0 序
- 本章对
java命令的使用、最佳实践进行全方位的总结。
1 java命令
1.0 场景：查看版本
- 方法1
# java -version
java version "1.8.0_261"
Java(TM) SE Runtime Environment (build 1.8.0_261-b12)
Java HotSpot(TM) 64-Bit Server VM (build 25.261-b12, mixed mode)
- 方法2
# java -XshowSettings:properties -version
Property settings:awt.toolkit = sun.awt.windows.WToolkitfile.encoding = GBKfile.encoding.pkg = sun.iofile.separator = \java.awt.graphicsenv = sun.awt.Win32GraphicsEnvironmentjava.awt.printerjob = sun.awt.windows.WPrinterJobjava.class.path = .D:\Program\Java\jdk1.8.0_261\lib\dt.jarD:\Program\Java\jdk1.8.0_261\lib\tools.jarjava.class.version = 52.0java.endorsed.dirs = D:\Program\Java\jdk1.8.0_261\jre\lib\endorsedjava.ext.dirs = D:\Program\Java\jdk1.8.0_261\jre\lib\extC:\Windows\Sun\Java\lib\extjava.home = D:\Program\Java\jdk1.8.0_261\jrejava.io.tmpdir = C:\Users\xxxxxx\AppData\Local\Temp\java.library.path = D:\Program\Java\jdk1.8.0_261\binC:\Windows\Sun\Java\binC:\Windows\system32C:\Windowsc:\Users\xxxxxx\AppData\Local\Programs\Cursor\resources\app\binC:\Windows\system32C:\WindowsC:\Windows\System32\WbemC:\Windows\System32\WindowsPowerShell\v1.0\C:\Windows\System32\OpenSSH\C\Program Files (x86)\NVIDIA Corporation\PhysX\CommonD:\Program\GNUWin\GnuWin32\binD:\Program\Arthas\lib\3.5.2\arthasD:\Program\Apache-Tomcat\apache-tomcat-8.5.84\binC:\Program Files (x86)\Enterprise Vault\EVClient\x64\D:\Program\WinMergeC:\Program Files\dotnet\C:\Users\xxxxxx\AppData\Local\Microsoft\WindowsAppsD:\Program\Java\jdk1.8.0_261\binD:\Program\Java\jdk1.8.0_261\jre\binD:\Program\git\cmdD:\Program\IDEA\IDEA 2021.3.1\IntelliJ IDEA 2021.3.1\binD:\Program\maven\apache-maven-3.8.1\binD:\Program\gradle\gradle-6.8\binD:\Program\VSCode\binD:\Program\DiffUseD:\Program\PyCharm\PyCharm2023.2.1\binc:\Users\D:\Program\JMeter\apache-jmeter-5.5\binD:\Program\miktex\miktex-24.1\miktex\bin\x64\D:\Program\nodejs\node-v20.11.1-win-x64C:\insolu\client001C:\Users\xxxxxx\AppData\Local\Microsoft\WindowsAppsD:\Program\Java\jdk1.8.0_261\binD:\Program\Java\jdk1.8.0_261\jre\binD:\Program\git\cmdD:\Program\IDEA\IDEA 2021.3.1\IntelliJ IDEA 2021.3.1\binD:\Program\maven\apache-maven-3.8.1\binD:\Program\gradle\gradle-6.8\binD:\Program\VSCode\binD:\Program\DiffUseD:\Program\PyCharm\PyCharm2023.2.1\bin.java.runtime.name = Java(TM) SE Runtime Environmentjava.runtime.version = 1.8.0_261-b12java.specification.name = Java Platform API Specificationjava.specification.vendor = Oracle Corporationjava.specification.version = 1.8java.vendor = Oracle Corporationjava.vendor.url = http://java.oracle.com/java.vendor.url.bug = http://bugreport.sun.com/bugreport/java.version = 1.8.0_261java.vm.info = mixed modejava.vm.name = Java HotSpot(TM) 64-Bit Server VMjava.vm.specification.name = Java Virtual Machine Specificationjava.vm.specification.vendor = Oracle Corporationjava.vm.specification.version = 1.8java.vm.vendor = Oracle Corporationjava.vm.version = 25.261-b12line.separator = \r \nos.arch = amd64os.name = Windows 10os.version = 10.0path.separator = ;sun.arch.data.model = 64sun.boot.class.path = D:\Program\Java\jdk1.8.0_261\jre\lib\resources.jarD:\Program\Java\jdk1.8.0_261\jre\lib\rt.jarD:\Program\Java\jdk1.8.0_261\jre\lib\sunrsasign.jarD:\Program\Java\jdk1.8.0_261\jre\lib\jsse.jarD:\Program\Java\jdk1.8.0_261\jre\lib\jce.jarD:\Program\Java\jdk1.8.0_261\jre\lib\charsets.jarD:\Program\Java\jdk1.8.0_261\jre\lib\jfr.jarD:\Program\Java\jdk1.8.0_261\jre\classessun.boot.library.path = D:\Program\Java\jdk1.8.0_261\jre\binsun.cpu.endian = littlesun.cpu.isalist = amd64sun.desktop = windowssun.io.unicode.encoding = UnicodeLittlesun.java.launcher = SUN_STANDARDsun.jnu.encoding = GBKsun.management.compiler = HotSpot 64-Bit Tiered Compilerssun.os.patch.level =sun.stderr.encoding = ms936sun.stdout.encoding = ms936user.country = CNuser.dir = C:\Users\xxxxxxuser.home = C:\Users\xxxxxxuser.language = zhuser.name = xxxxxxuser.script =user.timezone =user.variant =java version "1.8.0_261"
Java(TM) SE Runtime Environment (build 1.8.0_261-b12)
Java HotSpot(TM) 64-Bit Server VM (build 25.261-b12, mixed mode)
1.1 场景：判断jdk厂商
- 问题背景
- jdk厂商很多，不同jdk还是有细微差异。这会导致在不同部署环境中，可能会报一些因jdk厂商或jdk版本原因导致的错误（如：cacerts文件，openjdk中是不存在的）。这时知道jdk厂商就很必要了。
- 收费厂商
- Oracle JDK Amazon :
- Amazon Corretto JDK :
- 免费厂商
- OpenJDK : https://github.com/AdoptOpenJDK/openjdk8-upstream-binaries/releases/tag/
- BellSoft Liberica JDK
- Eclipse Temurin
- Red Hat build of OpenJDK : https://developers.redhat.com/products/openjdk/download?onebox=openjdk (需登录注册后，才可下载)
- Microsoft Build of OpenJDK（微软）
- 阿里巴巴 Dragonwell JDK
- 腾讯 Kona JDK
- 华为 毕昇JDK
- 方法1
查看
java.specification.vendor/java.vendor/java.vendor.url/java.vm.vendor/java.vm.specification.vendor字样
# java -XshowSettings:properties -version
Property settings:awt.toolkit = sun.awt.windows.WToolkitfile.encoding = GBKfile.encoding.pkg = sun.iofile.separator = \java.awt.graphicsenv = sun.awt.Win32GraphicsEnvironmentjava.awt.printerjob = sun.awt.windows.WPrinterJobjava.class.path = .D:\Program\Java\jdk1.8.0_261\lib\dt.jarD:\Program\Java\jdk1.8.0_261\lib\tools.jarjava.class.version = 52.0java.endorsed.dirs = D:\Program\Java\jdk1.8.0_261\jre\lib\endorsedjava.ext.dirs = D:\Program\Java\jdk1.8.0_261\jre\lib\extC:\Windows\Sun\Java\lib\extjava.home = D:\Program\Java\jdk1.8.0_261\jrejava.io.tmpdir = C:\Users\xxxxxx\AppData\Local\Temp\java.library.path = D:\Program\Java\jdk1.8.0_261\binC:\Windows\Sun\Java\binC:\Windows\system32C:\Windowsc:\Users\xxxxxx\AppData\Local\Programs\Cursor\resources\app\binC:\Windows\system32C:\WindowsC:\Windows\System32\WbemC:\Windows\System32\WindowsPowerShell\v1.0\C:\Windows\System32\OpenSSH\C\Program Files (x86)\NVIDIA Corporation\PhysX\CommonD:\Program\GNUWin\GnuWin32\binD:\Program\Arthas\lib\3.5.2\arthasD:\Program\Apache-Tomcat\apache-tomcat-8.5.84\binC:\Program Files (x86)\Enterprise Vault\EVClient\x64\D:\Program\WinMergeC:\Program Files\dotnet\C:\Users\xxxxxx\AppData\Local\Microsoft\WindowsAppsD:\Program\Java\jdk1.8.0_261\binD:\Program\Java\jdk1.8.0_261\jre\binD:\Program\git\cmdD:\Program\IDEA\IDEA 2021.3.1\IntelliJ IDEA 2021.3.1\binD:\Program\maven\apache-maven-3.8.1\binD:\Program\gradle\gradle-6.8\binD:\Program\VSCode\binD:\Program\DiffUseD:\Program\PyCharm\PyCharm2023.2.1\binc:\Users\D:\Program\JMeter\apache-jmeter-5.5\binD:\Program\miktex\miktex-24.1\miktex\bin\x64\D:\Program\nodejs\node-v20.11.1-win-x64C:\insolu\client001C:\Users\xxxxxx\AppData\Local\Microsoft\WindowsAppsD:\Program\Java\jdk1.8.0_261\binD:\Program\Java\jdk1.8.0_261\jre\binD:\Program\git\cmdD:\Program\IDEA\IDEA 2021.3.1\IntelliJ IDEA 2021.3.1\binD:\Program\maven\apache-maven-3.8.1\binD:\Program\gradle\gradle-6.8\binD:\Program\VSCode\binD:\Program\DiffUseD:\Program\PyCharm\PyCharm2023.2.1\bin.java.runtime.name = Java(TM) SE Runtime Environmentjava.runtime.version = 1.8.0_261-b12java.specification.name = Java Platform API Specificationjava.specification.vendor = Oracle Corporationjava.specification.version = 1.8java.vendor = Oracle Corporationjava.vendor.url = http://java.oracle.com/java.vendor.url.bug = http://bugreport.sun.com/bugreport/java.version = 1.8.0_261java.vm.info = mixed modejava.vm.name = Java HotSpot(TM) 64-Bit Server VMjava.vm.specification.name = Java Virtual Machine Specificationjava.vm.specification.vendor = Oracle Corporationjava.vm.specification.version = 1.8java.vm.vendor = Oracle Corporationjava.vm.version = 25.261-b12line.separator = \r \nos.arch = amd64os.name = Windows 10os.version = 10.0path.separator = ;sun.arch.data.model = 64sun.boot.class.path = D:\Program\Java\jdk1.8.0_261\jre\lib\resources.jarD:\Program\Java\jdk1.8.0_261\jre\lib\rt.jarD:\Program\Java\jdk1.8.0_261\jre\lib\sunrsasign.jarD:\Program\Java\jdk1.8.0_261\jre\lib\jsse.jarD:\Program\Java\jdk1.8.0_261\jre\lib\jce.jarD:\Program\Java\jdk1.8.0_261\jre\lib\charsets.jarD:\Program\Java\jdk1.8.0_261\jre\lib\jfr.jarD:\Program\Java\jdk1.8.0_261\jre\classessun.boot.library.path = D:\Program\Java\jdk1.8.0_261\jre\binsun.cpu.endian = littlesun.cpu.isalist = amd64sun.desktop = windowssun.io.unicode.encoding = UnicodeLittlesun.java.launcher = SUN_STANDARDsun.jnu.encoding = GBKsun.management.compiler = HotSpot 64-Bit Tiered Compilerssun.os.patch.level =sun.stderr.encoding = ms936sun.stdout.encoding = ms936user.country = CNuser.dir = C:\Users\xxxxxxuser.home = C:\Users\xxxxxxuser.language = zhuser.name = xxxxxxuser.script =user.timezone =user.variant =java version "1.8.0_261"
Java(TM) SE Runtime Environment (build 1.8.0_261-b12)
Java HotSpot(TM) 64-Bit Server VM (build 25.261-b12, mixed mode)
- 方法2：通过java的图标来进行判别
场景：查看jvm全局参数/启动参数
方法1：java -XX:+PrintFlagsFinal
# java -XX:+PrintFlagsFinal
[Global flags]intx ActiveProcessorCount = -1 {product}uintx AdaptiveSizeDecrementScaleFactor = 4 {product}uintx AdaptiveSizeMajorGCDecayTimeScale = 10 {product}uintx AdaptiveSizePausePolicy = 0 {product}uintx AdaptiveSizePolicyCollectionCostMargin = 50 {product}uintx AdaptiveSizePolicyInitializingSteps = 20 {product}uintx AdaptiveSizePolicyOutputInterval = 0 {product}uintx AdaptiveSizePolicyWeight = 10 {product}uintx AdaptiveSizeThroughPutPolicy = 0 {product}uintx AdaptiveTimeWeight = 25 {product}bool AdjustConcurrency = false {product}bool AggressiveHeap = false {product}bool AggressiveOpts = false {product}intx AliasLevel = 3 {C2 product}bool AlignVector = false {C2 product}intx AllocateInstancePrefetchLines = 1 {product}intx AllocatePrefetchDistance = 192 {product}intx AllocatePrefetchInstr = 3 {product}intx AllocatePrefetchLines = 4 {product}intx AllocatePrefetchStepSize = 64 {product}intx AllocatePrefetchStyle = 1 {product}bool AllowJNIEnvProxy = false {product}bool AllowNonVirtualCalls = false {product}bool AllowParallelDefineClass = false {product}bool AllowUserSignalHandlers = false {product}bool AlwaysActAsServerClassMachine = false {product}bool AlwaysCompileLoopMethods = false {product}bool AlwaysLockClassLoader = false {product}bool AlwaysPreTouch = false {product}bool AlwaysRestoreFPU = false {product}bool AlwaysTenure = false {product}bool AssertOnSuspendWaitFailure = false {product}bool AssumeMP = false {product}intx AutoBoxCacheMax = 128 {C2 product}uintx AutoGCSelectPauseMillis = 5000 {product}intx BCEATraceLevel = 0 {product}intx BackEdgeThreshold = 100000 {pd product}bool BackgroundCompilation = true {pd product}uintx BaseFootPrintEstimate = 268435456 {product}intx BiasedLockingBulkRebiasThreshold = 20 {product}intx BiasedLockingBulkRevokeThreshold = 40 {product}intx BiasedLockingDecayTime = 25000 {product}intx BiasedLockingStartupDelay = 4000 {product}bool BindGCTaskThreadsToCPUs = false {product}bool BlockLayoutByFrequency = true {C2 product}intx BlockLayoutMinDiamondPercentage = 20 {C2 product}bool BlockLayoutRotateLoops = true {C2 product}bool BranchOnRegister = false {C2 product}bool BytecodeVerificationLocal = false {product}bool BytecodeVerificationRemote = true {product}bool C1OptimizeVirtualCallProfiling = true {C1 product}bool C1ProfileBranches = true {C1 product}bool C1ProfileCalls = true {C1 product}bool C1ProfileCheckcasts = true {C1 product}bool C1ProfileInlinedCalls = true {C1 product}bool C1ProfileVirtualCalls = true {C1 product}bool C1UpdateMethodData = true {C1 product}intx CICompilerCount := 4 {product}bool CICompilerCountPerCPU = true {product}bool CITime = false {product}bool CMSAbortSemantics = false {product}uintx CMSAbortablePrecleanMinWorkPerIteration = 100 {product}intx CMSAbortablePrecleanWaitMillis = 100 {manageable}uintx CMSBitMapYieldQuantum = 10485760 {product}uintx CMSBootstrapOccupancy = 50 {product}bool CMSClassUnloadingEnabled = true {product}uintx CMSClassUnloadingMaxInterval = 0 {product}bool CMSCleanOnEnter = true {product}bool CMSCompactWhenClearAllSoftRefs = true {product}uintx CMSConcMarkMultiple = 32 {product}bool CMSConcurrentMTEnabled = true {product}uintx CMSCoordinatorYieldSleepCount = 10 {product}bool CMSDumpAtPromotionFailure = false {product}bool CMSEdenChunksRecordAlways = true {product}uintx CMSExpAvgFactor = 50 {product}bool CMSExtrapolateSweep = false {product}uintx CMSFullGCsBeforeCompaction = 0 {product}uintx CMSIncrementalDutyCycle = 10 {product}uintx CMSIncrementalDutyCycleMin = 0 {product}bool CMSIncrementalMode = false {product}uintx CMSIncrementalOffset = 0 {product}bool CMSIncrementalPacing = true {product}uintx CMSIncrementalSafetyFactor = 10 {product}uintx CMSIndexedFreeListReplenish = 4 {product}intx CMSInitiatingOccupancyFraction = -1 {product}uintx CMSIsTooFullPercentage = 98 {product}double CMSLargeCoalSurplusPercent = 0.950000 {product}double CMSLargeSplitSurplusPercent = 1.000000 {product}bool CMSLoopWarn = false {product}uintx CMSMaxAbortablePrecleanLoops = 0 {product}intx CMSMaxAbortablePrecleanTime = 5000 {product}uintx CMSOldPLABMax = 1024 {product}uintx CMSOldPLABMin = 16 {product}uintx CMSOldPLABNumRefills = 4 {product}uintx CMSOldPLABReactivityFactor = 2 {product}bool CMSOldPLABResizeQuicker = false {product}uintx CMSOldPLABToleranceFactor = 4 {product}bool CMSPLABRecordAlways = true {product}uintx CMSParPromoteBlocksToClaim = 16 {product}bool CMSParallelInitialMarkEnabled = true {product}bool CMSParallelRemarkEnabled = true {product}bool CMSParallelSurvivorRemarkEnabled = true {product}uintx CMSPrecleanDenominator = 3 {product}uintx CMSPrecleanIter = 3 {product}uintx CMSPrecleanNumerator = 2 {product}bool CMSPrecleanRefLists1 = true {product}bool CMSPrecleanRefLists2 = false {product}bool CMSPrecleanSurvivors1 = false {product}bool CMSPrecleanSurvivors2 = true {product}uintx CMSPrecleanThreshold = 1000 {product}bool CMSPrecleaningEnabled = true {product}bool CMSPrintChunksInDump = false {product}bool CMSPrintEdenSurvivorChunks = false {product}bool CMSPrintObjectsInDump = false {product}uintx CMSRemarkVerifyVariant = 1 {product}bool CMSReplenishIntermediate = true {product}uintx CMSRescanMultiple = 32 {product}uintx CMSSamplingGrain = 16384 {product}bool CMSScavengeBeforeRemark = false {product}uintx CMSScheduleRemarkEdenPenetration = 50 {product}uintx CMSScheduleRemarkEdenSizeThreshold = 2097152 {product}uintx CMSScheduleRemarkSamplingRatio = 5 {product}double CMSSmallCoalSurplusPercent = 1.050000 {product}double CMSSmallSplitSurplusPercent = 1.100000 {product}bool CMSSplitIndexedFreeListBlocks = true {product}intx CMSTriggerInterval = -1 {manageable}uintx CMSTriggerRatio = 80 {product}intx CMSWaitDuration = 2000 {manageable}uintx CMSWorkQueueDrainThreshold = 10 {product}bool CMSYield = true {product}uintx CMSYieldSleepCount = 0 {product}uintx CMSYoungGenPerWorker = 67108864 {pd product}uintx CMS_FLSPadding = 1 {product}uintx CMS_FLSWeight = 75 {product}uintx CMS_SweepPadding = 1 {product}uintx CMS_SweepTimerThresholdMillis = 10 {product}uintx CMS_SweepWeight = 75 {product}bool CheckEndorsedAndExtDirs = false {product}bool CheckJNICalls = false {product}bool ClassUnloading = true {product}bool ClassUnloadingWithConcurrentMark = true {product}intx ClearFPUAtPark = 0 {product}bool ClipInlining = true {product}uintx CodeCacheExpansionSize = 65536 {pd product}uintx CodeCacheMinimumFreeSpace = 512000 {product}bool CollectGen0First = false {product}bool CompactFields = true {product}intx CompilationPolicyChoice = 3 {product}
ccstrlist CompileCommand = {product}ccstr CompileCommandFile = {product}
ccstrlist CompileOnly = {product}intx CompileThreshold = 10000 {pd product}bool CompilerThreadHintNoPreempt = true {product}intx CompilerThreadPriority = -1 {product}intx CompilerThreadStackSize = 0 {pd product}uintx CompressedClassSpaceSize = 1073741824 {product}uintx ConcGCThreads = 0 {product}intx ConditionalMoveLimit = 3 {C2 pd product}intx ContendedPaddingWidth = 128 {product}bool ConvertSleepToYield = true {pd product}bool ConvertYieldToSleep = false {product}bool CrashOnOutOfMemoryError = false {product}bool CreateMinidumpOnCrash = false {product}bool CriticalJNINatives = true {product}bool DTraceAllocProbes = false {product}bool DTraceMethodProbes = false {product}bool DTraceMonitorProbes = false {product}bool Debugging = false {product}uintx DefaultMaxRAMFraction = 4 {product}intx DefaultThreadPriority = -1 {product}intx DeferPollingPageLoopCount = -1 {product}intx DeferThrSuspendLoopCount = 4000 {product}bool DeoptimizeRandom = false {product}bool DisableAttachMechanism = false {product}bool DisableExplicitGC = false {product}bool DisplayVMOutputToStderr = false {product}bool DisplayVMOutputToStdout = false {product}bool DoEscapeAnalysis = true {C2 product}bool DontCompileHugeMethods = true {product}bool DontYieldALot = false {pd product}ccstr DumpLoadedClassList = {product}bool DumpReplayDataOnError = true {product}bool DumpSharedSpaces = false {product}bool EagerXrunInit = false {product}intx EliminateAllocationArraySizeLimit = 64 {C2 product}bool EliminateAllocations = true {C2 product}bool EliminateAutoBox = true {C2 product}bool EliminateLocks = true {C2 product}bool EliminateNestedLocks = true {C2 product}intx EmitSync = 0 {product}bool EnableContended = true {product}bool EnableResourceManagementTLABCache = true {product}bool EnableSharedLookupCache = true {product}bool EnableTracing = false {product}uintx ErgoHeapSizeLimit = 0 {product}ccstr ErrorFile = {product}ccstr ErrorReportServer = {product}double EscapeAnalysisTimeout = 20.000000 {C2 product}bool EstimateArgEscape = true {product}bool ExitOnOutOfMemoryError = false {product}bool ExplicitGCInvokesConcurrent = false {product}bool ExplicitGCInvokesConcurrentAndUnloadsClasses = false {product}bool ExtendedDTraceProbes = false {product}ccstr ExtraSharedClassListFile = {product}bool FLSAlwaysCoalesceLarge = false {product}uintx FLSCoalescePolicy = 2 {product}double FLSLargestBlockCoalesceProximity = 0.990000 {product}bool FailOverToOldVerifier = true {product}bool FastTLABRefill = true {product}intx FenceInstruction = 0 {ARCH product}intx FieldsAllocationStyle = 1 {product}bool FilterSpuriousWakeups = true {product}ccstr FlightRecorderOptions = {product}bool ForceNUMA = false {product}bool ForceTimeHighResolution = false {product}intx FreqInlineSize = 325 {pd product}double G1ConcMarkStepDurationMillis = 10.000000 {product}uintx G1ConcRSHotCardLimit = 4 {product}uintx G1ConcRSLogCacheSize = 10 {product}intx G1ConcRefinementGreenZone = 0 {product}intx G1ConcRefinementRedZone = 0 {product}intx G1ConcRefinementServiceIntervalMillis = 300 {product}uintx G1ConcRefinementThreads = 0 {product}intx G1ConcRefinementThresholdStep = 0 {product}intx G1ConcRefinementYellowZone = 0 {product}uintx G1ConfidencePercent = 50 {product}uintx G1HeapRegionSize = 0 {product}uintx G1HeapWastePercent = 5 {product}uintx G1MixedGCCountTarget = 8 {product}intx G1RSetRegionEntries = 0 {product}uintx G1RSetScanBlockSize = 64 {product}intx G1RSetSparseRegionEntries = 0 {product}intx G1RSetUpdatingPauseTimePercent = 10 {product}intx G1RefProcDrainInterval = 10 {product}uintx G1ReservePercent = 10 {product}uintx G1SATBBufferEnqueueingThresholdPercent = 60 {product}intx G1SATBBufferSize = 1024 {product}intx G1UpdateBufferSize = 256 {product}bool G1UseAdaptiveConcRefinement = true {product}uintx GCDrainStackTargetSize = 64 {product}uintx GCHeapFreeLimit = 2 {product}uintx GCLockerEdenExpansionPercent = 5 {product}bool GCLockerInvokesConcurrent = false {product}uintx GCLogFileSize = 8192 {product}uintx GCPauseIntervalMillis = 0 {product}uintx GCTaskTimeStampEntries = 200 {product}uintx GCTimeLimit = 98 {product}uintx GCTimeRatio = 99 {product}uintx HeapBaseMinAddress = 2147483648 {pd product}bool HeapDumpAfterFullGC = false {manageable}bool HeapDumpBeforeFullGC = false {manageable}bool HeapDumpOnOutOfMemoryError = false {manageable}ccstr HeapDumpPath = {manageable}uintx HeapFirstMaximumCompactionCount = 3 {product}uintx HeapMaximumCompactionInterval = 20 {product}uintx HeapSizePerGCThread = 87241520 {product}bool IgnoreEmptyClassPaths = false {product}bool IgnoreUnrecognizedVMOptions = false {product}uintx IncreaseFirstTierCompileThresholdAt = 50 {product}bool IncrementalInline = true {C2 product}uintx InitialBootClassLoaderMetaspaceSize = 4194304 {product}uintx InitialCodeCacheSize = 2555904 {pd product}uintx InitialHeapSize := 264241152 {product}uintx InitialRAMFraction = 64 {product}double InitialRAMPercentage = 1.562500 {product}uintx InitialSurvivorRatio = 8 {product}uintx InitialTenuringThreshold = 7 {product}uintx InitiatingHeapOccupancyPercent = 45 {product}bool Inline = true {product}ccstr InlineDataFile = {product}intx InlineSmallCode = 2000 {pd product}bool InlineSynchronizedMethods = true {C1 product}bool InsertMemBarAfterArraycopy = true {C2 product}intx InteriorEntryAlignment = 16 {C2 pd product}intx InterpreterProfilePercentage = 33 {product}bool JNIDetachReleasesMonitors = true {product}bool JavaMonitorsInStackTrace = true {product}intx JavaPriority10_To_OSPriority = -1 {product}intx JavaPriority1_To_OSPriority = -1 {product}intx JavaPriority2_To_OSPriority = -1 {product}intx JavaPriority3_To_OSPriority = -1 {product}intx JavaPriority4_To_OSPriority = -1 {product}intx JavaPriority5_To_OSPriority = -1 {product}intx JavaPriority6_To_OSPriority = -1 {product}intx JavaPriority7_To_OSPriority = -1 {product}intx JavaPriority8_To_OSPriority = -1 {product}intx JavaPriority9_To_OSPriority = -1 {product}bool LIRFillDelaySlots = false {C1 pd product}uintx LargePageHeapSizeThreshold = 134217728 {product}uintx LargePageSizeInBytes = 0 {product}bool LazyBootClassLoader = true {product}intx LiveNodeCountInliningCutoff = 40000 {C2 product}bool LogCommercialFeatures = false {product}intx LoopMaxUnroll = 16 {C2 product}intx LoopOptsCount = 43 {C2 product}intx LoopUnrollLimit = 60 {C2 pd product}intx LoopUnrollMin = 4 {C2 product}bool LoopUnswitching = true {C2 product}bool ManagementServer = false {product}uintx MarkStackSize = 4194304 {product}uintx MarkStackSizeMax = 536870912 {product}uintx MarkSweepAlwaysCompactCount = 4 {product}uintx MarkSweepDeadRatio = 1 {product}intx MaxBCEAEstimateLevel = 5 {product}intx MaxBCEAEstimateSize = 150 {product}uintx MaxDirectMemorySize = 0 {product}bool MaxFDLimit = true {product}uintx MaxGCMinorPauseMillis = 4294967295 {product}uintx MaxGCPauseMillis = 4294967295 {product}uintx MaxHeapFreeRatio = 100 {manageable}uintx MaxHeapSize := 4227858432 {product}intx MaxInlineLevel = 9 {product}intx MaxInlineSize = 35 {product}intx MaxJNILocalCapacity = 65536 {product}intx MaxJavaStackTraceDepth = 1024 {product}intx MaxJumpTableSize = 65000 {C2 product}intx MaxJumpTableSparseness = 5 {C2 product}intx MaxLabelRootDepth = 1100 {C2 product}intx MaxLoopPad = 11 {C2 product}uintx MaxMetaspaceExpansion = 5451776 {product}uintx MaxMetaspaceFreeRatio = 70 {product}uintx MaxMetaspaceSize = 4294901760 {product}uintx MaxNewSize := 1409286144 {product}intx MaxNodeLimit = 75000 {C2 product}uint64_t MaxRAM = 0 {pd product}uintx MaxRAMFraction = 4 {product}double MaxRAMPercentage = 25.000000 {product}intx MaxRecursiveInlineLevel = 1 {product}uintx MaxTenuringThreshold = 15 {product}intx MaxTrivialSize = 6 {product}intx MaxVectorSize = 32 {C2 product}uintx MetaspaceSize = 21807104 {pd product}bool MethodFlushing = true {product}uintx MinHeapDeltaBytes := 524288 {product}uintx MinHeapFreeRatio = 0 {manageable}intx MinInliningThreshold = 250 {product}intx MinJumpTableSize = 10 {C2 pd product}uintx MinMetaspaceExpansion = 339968 {product}uintx MinMetaspaceFreeRatio = 40 {product}uintx MinRAMFraction = 2 {product}double MinRAMPercentage = 50.000000 {product}uintx MinSurvivorRatio = 3 {product}uintx MinTLABSize = 2048 {product}intx MonitorBound = 0 {product}bool MonitorInUseLists = false {product}intx MultiArrayExpandLimit = 6 {C2 product}bool MustCallLoadClassInternal = false {product}uintx NUMAChunkResizeWeight = 20 {product}uintx NUMAInterleaveGranularity = 2097152 {product}uintx NUMAPageScanRate = 256 {product}uintx NUMASpaceResizeRate = 1073741824 {product}bool NUMAStats = false {product}ccstr NativeMemoryTracking = off {product}bool NeedsDeoptSuspend = false {pd product}bool NeverActAsServerClassMachine = false {pd product}bool NeverTenure = false {product}uintx NewRatio = 2 {product}uintx NewSize := 88080384 {product}uintx NewSizeThreadIncrease = 5320 {pd product}intx NmethodSweepActivity = 10 {product}intx NmethodSweepCheckInterval = 5 {product}intx NmethodSweepFraction = 16 {product}intx NodeLimitFudgeFactor = 2000 {C2 product}uintx NumberOfGCLogFiles = 0 {product}intx NumberOfLoopInstrToAlign = 4 {C2 product}intx ObjectAlignmentInBytes = 8 {lp64_product}uintx OldPLABSize = 1024 {product}uintx OldPLABWeight = 50 {product}uintx OldSize := 176160768 {product}bool OmitStackTraceInFastThrow = true {product}
ccstrlist OnError = {product}
ccstrlist OnOutOfMemoryError = {product}intx OnStackReplacePercentage = 140 {pd product}bool OptimizeFill = true {C2 product}bool OptimizePtrCompare = true {C2 product}bool OptimizeStringConcat = true {C2 product}bool OptoBundling = false {C2 pd product}intx OptoLoopAlignment = 16 {pd product}bool OptoScheduling = false {C2 pd product}uintx PLABWeight = 75 {product}bool PSChunkLargeArrays = true {product}intx ParGCArrayScanChunk = 50 {product}uintx ParGCDesiredObjsFromOverflowList = 20 {product}bool ParGCTrimOverflow = true {product}bool ParGCUseLocalOverflow = false {product}uintx ParallelGCBufferWastePct = 10 {product}uintx ParallelGCThreads = 8 {product}bool ParallelGCVerbose = false {product}uintx ParallelOldDeadWoodLimiterMean = 50 {product}uintx ParallelOldDeadWoodLimiterStdDev = 80 {product}bool ParallelRefProcBalancingEnabled = true {product}bool ParallelRefProcEnabled = false {product}bool PartialPeelAtUnsignedTests = true {C2 product}bool PartialPeelLoop = true {C2 product}intx PartialPeelNewPhiDelta = 0 {C2 product}uintx PausePadding = 1 {product}intx PerBytecodeRecompilationCutoff = 200 {product}intx PerBytecodeTrapLimit = 4 {product}intx PerMethodRecompilationCutoff = 400 {product}intx PerMethodTrapLimit = 100 {product}bool PerfAllowAtExitRegistration = false {product}bool PerfBypassFileSystemCheck = false {product}intx PerfDataMemorySize = 32768 {product}intx PerfDataSamplingInterval = 50 {product}ccstr PerfDataSaveFile = {product}bool PerfDataSaveToFile = false {product}bool PerfDisableSharedMem = false {product}intx PerfMaxStringConstLength = 1024 {product}intx PreInflateSpin = 10 {pd product}bool PreferInterpreterNativeStubs = false {pd product}intx PrefetchCopyIntervalInBytes = 576 {product}intx PrefetchFieldsAhead = 1 {product}intx PrefetchScanIntervalInBytes = 576 {product}bool PreserveAllAnnotations = false {product}bool PreserveFramePointer = false {pd product}uintx PretenureSizeThreshold = 0 {product}bool PrintAdaptiveSizePolicy = false {product}bool PrintCMSInitiationStatistics = false {product}intx PrintCMSStatistics = 0 {product}bool PrintClassHistogram = false {manageable}bool PrintClassHistogramAfterFullGC = false {manageable}bool PrintClassHistogramBeforeFullGC = false {manageable}bool PrintCodeCache = false {product}bool PrintCodeCacheOnCompilation = false {product}bool PrintCommandLineFlags = false {product}bool PrintCompilation = false {product}bool PrintConcurrentLocks = false {manageable}intx PrintFLSCensus = 0 {product}intx PrintFLSStatistics = 0 {product}bool PrintFlagsFinal := true {product}bool PrintFlagsInitial = false {product}bool PrintGC = false {manageable}bool PrintGCApplicationConcurrentTime = false {product}bool PrintGCApplicationStoppedTime = false {product}bool PrintGCCause = true {product}bool PrintGCDateStamps = false {manageable}bool PrintGCDetails = false {manageable}bool PrintGCID = false {manageable}bool PrintGCTaskTimeStamps = false {product}bool PrintGCTimeStamps = false {manageable}bool PrintHeapAtGC = false {product rw}bool PrintHeapAtGCExtended = false {product rw}bool PrintHeapAtSIGBREAK = true {product}bool PrintJNIGCStalls = false {product}bool PrintJNIResolving = false {product}bool PrintOldPLAB = false {product}bool PrintOopAddress = false {product}bool PrintPLAB = false {product}bool PrintParallelOldGCPhaseTimes = false {product}bool PrintPromotionFailure = false {product}bool PrintReferenceGC = false {product}bool PrintSafepointStatistics = false {product}intx PrintSafepointStatisticsCount = 300 {product}intx PrintSafepointStatisticsTimeout = -1 {product}bool PrintSharedArchiveAndExit = false {product}bool PrintSharedDictionary = false {product}bool PrintSharedSpaces = false {product}bool PrintStringDeduplicationStatistics = false {product}bool PrintStringTableStatistics = false {product}bool PrintTLAB = false {product}bool PrintTenuringDistribution = false {product}bool PrintTieredEvents = false {product}bool PrintVMOptions = false {product}bool PrintVMQWaitTime = false {product}bool PrintWarnings = true {product}uintx ProcessDistributionStride = 4 {product}bool ProfileInterpreter = true {pd product}bool ProfileIntervals = false {product}intx ProfileIntervalsTicks = 100 {product}intx ProfileMaturityPercentage = 20 {product}bool ProfileVM = false {product}bool ProfilerPrintByteCodeStatistics = false {product}bool ProfilerRecordPC = false {product}uintx PromotedPadding = 3 {product}uintx QueuedAllocationWarningCount = 0 {product}uintx RTMRetryCount = 5 {ARCH product}bool RangeCheckElimination = true {product}intx ReadPrefetchInstr = 0 {ARCH product}bool ReassociateInvariants = true {C2 product}bool ReduceBulkZeroing = true {C2 product}bool ReduceFieldZeroing = true {C2 product}bool ReduceInitialCardMarks = true {C2 product}bool ReduceSignalUsage = false {product}intx RefDiscoveryPolicy = 0 {product}bool ReflectionWrapResolutionErrors = true {product}bool RegisterFinalizersAtInit = true {product}bool RelaxAccessControlCheck = false {product}ccstr ReplayDataFile = {product}bool RequireSharedSpaces = false {product}uintx ReservedCodeCacheSize = 251658240 {pd product}bool ResizeOldPLAB = true {product}bool ResizePLAB = true {product}bool ResizeTLAB = true {pd product}bool RestoreMXCSROnJNICalls = false {product}bool RestrictContended = true {product}bool RewriteBytecodes = true {pd product}bool RewriteFrequentPairs = true {pd product}intx SafepointPollOffset = 256 {C1 pd product}intx SafepointSpinBeforeYield = 2000 {product}bool SafepointTimeout = false {product}intx SafepointTimeoutDelay = 10000 {product}bool ScavengeBeforeFullGC = true {product}intx SelfDestructTimer = 0 {product}uintx SharedBaseAddress = 0 {product}ccstr SharedClassListFile = {product}uintx SharedMiscCodeSize = 122880 {product}uintx SharedMiscDataSize = 4194304 {product}uintx SharedReadOnlySize = 16777216 {product}uintx SharedReadWriteSize = 16777216 {product}bool ShowMessageBoxOnError = false {product}intx SoftRefLRUPolicyMSPerMB = 1000 {product}bool SpecialEncodeISOArray = true {C2 product}bool SplitIfBlocks = true {C2 product}intx StackRedPages = 1 {pd product}intx StackShadowPages = 6 {pd product}bool StackTraceInThrowable = true {product}intx StackYellowPages = 3 {pd product}bool StartAttachListener = false {product}intx StarvationMonitorInterval = 200 {product}bool StressLdcRewrite = false {product}uintx StringDeduplicationAgeThreshold = 3 {product}uintx StringTableSize = 60013 {product}bool SuppressFatalErrorMessage = false {product}uintx SurvivorPadding = 3 {product}uintx SurvivorRatio = 8 {product}intx SuspendRetryCount = 50 {product}intx SuspendRetryDelay = 5 {product}intx SyncFlags = 0 {product}ccstr SyncKnobs = {product}intx SyncVerbose = 0 {product}uintx TLABAllocationWeight = 35 {product}uintx TLABRefillWasteFraction = 64 {product}uintx TLABSize = 0 {product}bool TLABStats = true {product}uintx TLABWasteIncrement = 4 {product}uintx TLABWasteTargetPercent = 1 {product}uintx TargetPLABWastePct = 10 {product}uintx TargetSurvivorRatio = 50 {product}uintx TenuredGenerationSizeIncrement = 20 {product}uintx TenuredGenerationSizeSupplement = 80 {product}uintx TenuredGenerationSizeSupplementDecay = 2 {product}intx ThreadPriorityPolicy = 0 {product}bool ThreadPriorityVerbose = false {product}uintx ThreadSafetyMargin = 52428800 {product}intx ThreadStackSize = 0 {pd product}uintx ThresholdTolerance = 10 {product}intx Tier0BackedgeNotifyFreqLog = 10 {product}intx Tier0InvokeNotifyFreqLog = 7 {product}intx Tier0ProfilingStartPercentage = 200 {product}intx Tier23InlineeNotifyFreqLog = 20 {product}intx Tier2BackEdgeThreshold = 0 {product}intx Tier2BackedgeNotifyFreqLog = 14 {product}intx Tier2CompileThreshold = 0 {product}intx Tier2InvokeNotifyFreqLog = 11 {product}intx Tier3BackEdgeThreshold = 60000 {product}intx Tier3BackedgeNotifyFreqLog = 13 {product}intx Tier3CompileThreshold = 2000 {product}intx Tier3DelayOff = 2 {product}intx Tier3DelayOn = 5 {product}intx Tier3InvocationThreshold = 200 {product}intx Tier3InvokeNotifyFreqLog = 10 {product}intx Tier3LoadFeedback = 5 {product}intx Tier3MinInvocationThreshold = 100 {product}intx Tier4BackEdgeThreshold = 40000 {product}intx Tier4CompileThreshold = 15000 {product}intx Tier4InvocationThreshold = 5000 {product}intx Tier4LoadFeedback = 3 {product}intx Tier4MinInvocationThreshold = 600 {product}bool TieredCompilation = true {pd product}intx TieredCompileTaskTimeout = 50 {product}intx TieredRateUpdateMaxTime = 25 {product}intx TieredRateUpdateMinTime = 1 {product}intx TieredStopAtLevel = 4 {product}bool TimeLinearScan = false {C1 product}bool TraceBiasedLocking = false {product}bool TraceClassLoading = false {product rw}bool TraceClassLoadingPreorder = false {product}bool TraceClassPaths = false {product}bool TraceClassResolution = false {product}bool TraceClassUnloading = false {product rw}bool TraceDynamicGCThreads = false {product}bool TraceGen0Time = false {product}bool TraceGen1Time = false {product}ccstr TraceJVMTI = {product}bool TraceLoaderConstraints = false {product rw}bool TraceMetadataHumongousAllocation = false {product}bool TraceMonitorInflation = false {product}bool TraceParallelOldGCTasks = false {product}intx TraceRedefineClasses = 0 {product}bool TraceSafepointCleanupTime = false {product}bool TraceSharedLookupCache = false {product}bool TraceSuspendWaitFailures = false {product}intx TrackedInitializationLimit = 50 {C2 product}bool TransmitErrorReport = false {product}bool TrapBasedNullChecks = false {pd product}bool TrapBasedRangeChecks = false {C2 pd product}intx TypeProfileArgsLimit = 2 {product}uintx TypeProfileLevel = 111 {pd product}intx TypeProfileMajorReceiverPercent = 90 {C2 product}intx TypeProfileParmsLimit = 2 {product}intx TypeProfileWidth = 2 {product}intx UnguardOnExecutionViolation = 0 {product}bool UnlinkSymbolsALot = false {product}bool Use486InstrsOnly = false {ARCH product}bool UseAES = true {product}bool UseAESCTRIntrinsics = true {product}bool UseAESIntrinsics = true {product}intx UseAVX = 2 {ARCH product}bool UseAdaptiveGCBoundary = false {product}bool UseAdaptiveGenerationSizePolicyAtMajorCollection = true {product}bool UseAdaptiveGenerationSizePolicyAtMinorCollection = true {product}bool UseAdaptiveNUMAChunkSizing = true {product}bool UseAdaptiveSizeDecayMajorGCCost = true {product}bool UseAdaptiveSizePolicy = true {product}bool UseAdaptiveSizePolicyFootprintGoal = true {product}bool UseAdaptiveSizePolicyWithSystemGC = false {product}bool UseAddressNop = true {ARCH product}bool UseAltSigs = false {product}bool UseAutoGCSelectPolicy = false {product}bool UseBMI1Instructions = true {ARCH product}bool UseBMI2Instructions = true {ARCH product}bool UseBiasedLocking = true {product}bool UseBimorphicInlining = true {C2 product}bool UseBoundThreads = true {product}bool UseCLMUL = true {ARCH product}bool UseCMSBestFit = true {product}bool UseCMSCollectionPassing = true {product}bool UseCMSCompactAtFullCollection = true {product}bool UseCMSInitiatingOccupancyOnly = false {product}bool UseCRC32Intrinsics = true {product}bool UseCodeCacheFlushing = true {product}bool UseCompiler = true {product}bool UseCompilerSafepoints = true {product}bool UseCompressedClassPointers := true {lp64_product}bool UseCompressedOops := true {lp64_product}bool UseConcMarkSweepGC = false {product}bool UseCondCardMark = false {C2 product}bool UseCountLeadingZerosInstruction = true {ARCH product}bool UseCountTrailingZerosInstruction = true {ARCH product}bool UseCountedLoopSafepoints = false {C2 product}bool UseCounterDecay = true {product}bool UseDivMod = true {C2 product}bool UseDynamicNumberOfGCThreads = false {product}bool UseFPUForSpilling = true {C2 product}bool UseFastAccessorMethods = false {product}bool UseFastEmptyMethods = false {product}bool UseFastJNIAccessors = true {product}bool UseFastStosb = true {ARCH product}bool UseG1GC = false {product}bool UseGCLogFileRotation = false {product}bool UseGCOverheadLimit = true {product}bool UseGCTaskAffinity = false {product}bool UseGHASHIntrinsics = true {product}bool UseHeavyMonitors = false {product}bool UseInlineCaches = true {product}bool UseInterpreter = true {product}bool UseJumpTables = true {C2 product}bool UseLWPSynchronization = true {product}bool UseLargePages = false {pd product}bool UseLargePagesInMetaspace = false {product}bool UseLargePagesIndividualAllocation := false {pd product}bool UseLockedTracing = false {product}bool UseLoopCounter = true {product}bool UseLoopInvariantCodeMotion = true {C1 product}bool UseLoopPredicate = true {C2 product}bool UseMathExactIntrinsics = true {C2 product}bool UseMaximumCompactionOnSystemGC = true {product}bool UseMembar = false {pd product}bool UseMontgomeryMultiplyIntrinsic = true {C2 product}bool UseMontgomerySquareIntrinsic = true {C2 product}bool UseMulAddIntrinsic = true {C2 product}bool UseMultiplyToLenIntrinsic = true {C2 product}bool UseNUMA = false {product}bool UseNUMAInterleaving = false {product}bool UseNewLongLShift = false {ARCH product}bool UseOSErrorReporting = false {pd product}bool UseOldInlining = true {C2 product}bool UseOnStackReplacement = true {pd product}bool UseOnlyInlinedBimorphic = true {C2 product}bool UseOptoBiasInlining = true {C2 product}bool UsePSAdaptiveSurvivorSizePolicy = true {product}bool UseParNewGC = false {product}bool UseParallelGC := true {product}bool UseParallelOldGC = true {product}bool UsePerfData = true {product}bool UsePopCountInstruction = true {product}bool UseRDPCForConstantTableBase = false {C2 product}bool UseRTMDeopt = false {ARCH product}bool UseRTMLocking = false {ARCH product}bool UseSHA = false {product}bool UseSHA1Intrinsics = false {product}bool UseSHA256Intrinsics = false {product}bool UseSHA512Intrinsics = false {product}intx UseSSE = 4 {product}bool UseSSE42Intrinsics = true {product}bool UseSerialGC = false {product}bool UseSharedSpaces = false {product}bool UseSignalChaining = true {product}bool UseSquareToLenIntrinsic = true {C2 product}bool UseStoreImmI16 = false {ARCH product}bool UseStringDeduplication = false {product}bool UseSuperWord = true {C2 product}bool UseTLAB = true {pd product}bool UseThreadPriorities = true {pd product}bool UseTypeProfile = true {product}bool UseTypeSpeculation = true {C2 product}bool UseUTCFileTimestamp = true {product}bool UseUnalignedLoadStores = true {ARCH product}bool UseVMInterruptibleIO = false {product}bool UseXMMForArrayCopy = true {product}bool UseXmmI2D = false {ARCH product}bool UseXmmI2F = false {ARCH product}bool UseXmmLoadAndClearUpper = true {ARCH product}bool UseXmmRegToRegMoveAll = true {ARCH product}bool VMThreadHintNoPreempt = false {product}intx VMThreadPriority = -1 {product}intx VMThreadStackSize = 0 {pd product}intx ValueMapInitialSize = 11 {C1 product}intx ValueMapMaxLoopSize = 8 {C1 product}intx ValueSearchLimit = 1000 {C2 product}bool VerifyMergedCPBytecodes = true {product}bool VerifySharedSpaces = false {product}intx WorkAroundNPTLTimedWaitHang = 1 {product}uintx YoungGenerationSizeIncrement = 20 {product}uintx YoungGenerationSizeSupplement = 80 {product}uintx YoungGenerationSizeSupplementDecay = 8 {product}uintx YoungPLABSize = 4096 {product}bool ZeroTLAB = false {product}intx hashCode = 5 {product}
用法: java [-options] class [args...](执行类)或 java [-options] -jar jarfile [args...](执行 jar 文件)
其中选项包括:-d32 使用 32 位数据模型 (如果可用)-d64 使用 64 位数据模型 (如果可用)-server 选择 "server" VM默认 VM 是 server.-cp <目录和 zip/jar 文件的类搜索路径>-classpath <目录和 zip/jar 文件的类搜索路径>用 ; 分隔的目录, JAR 档案和 ZIP 档案列表, 用于搜索类文件。-D<名称>=<值>设置系统属性-verbose:[class|gc|jni]启用详细输出-version 输出产品版本并退出-version:<值>警告: 此功能已过时, 将在未来发行版中删除。需要指定的版本才能运行-showversion 输出产品版本并继续-jre-restrict-search | -no-jre-restrict-search警告: 此功能已过时, 将在未来发行版中删除。在版本搜索中包括/排除用户专用 JRE-? -help 输出此帮助消息-X 输出非标准选项的帮助-ea[:<packagename>...|:<classname>]-enableassertions[:<packagename>...|:<classname>]按指定的粒度启用断言-da[:<packagename>...|:<classname>]-disableassertions[:<packagename>...|:<classname>]禁用具有指定粒度的断言-esa | -enablesystemassertions启用系统断言-dsa | -disablesystemassertions禁用系统断言-agentlib:<libname>[=<选项>]加载本机代理库 <libname>, 例如 -agentlib:hprof另请参阅 -agentlib:jdwp=help 和 -agentlib:hprof=help-agentpath:<pathname>[=<选项>]按完整路径名加载本机代理库-javaagent:<jarpath>[=<选项>]加载 Java 编程语言代理, 请参阅 java.lang.instrument-splash:<imagepath>使用指定的图像显示启动屏幕
有关详细信息, 请参阅 http://www.oracle.com/technetwork/java/javase/documentation/index.html。
方法2：jinfo <PID>
jinfo 15648
Attaching to process ID 15648, please wait...
Debugger attached successfully.
Server compiler detected.
JVM version is 25.261-b12
Java System Properties:idea.version = 2023.2.2
java.runtime.name = Java(TM) SE Runtime Environment
java.vm.version = 25.261-b12
sun.boot.library.path = D:\Program\Java\jdk1.8.0_261\jre\bin
java.vendor.url = http://java.oracle.com/
java.vm.vendor = Oracle Corporation
maven.multiModuleProjectDirectory = E:\source_code\BigData\bdp_common_data_service
path.separator = ;
guice.disable.misplaced.annotation.check = true
file.encoding.pkg = sun.io
java.vm.name = Java HotSpot(TM) 64-Bit Server VM
sun.os.patch.level =
sun.java.launcher = SUN_STANDARD
user.script =
user.country = CN
user.dir = E:\source_code\BigData\bdp_common_data_service
java.vm.specification.name = Java Virtual Machine Specification
java.runtime.version = 1.8.0_261-b12
java.awt.graphicsenv = sun.awt.Win32GraphicsEnvironment
os.arch = amd64
java.endorsed.dirs = D:\Program\Java\jdk1.8.0_261\jre\lib\endorsed
line.separator =java.io.tmpdir = C:\Users\xxxxxx\AppData\Local\Temp\
java.vm.specification.vendor = Oracle Corporation
idea.maven.embedder.version = 3.8.1
user.variant =
os.name = Windows 10
maven.defaultProjectBuilder.disableGlobalModelCache = true
maven.ext.class.path = D:\Program\IDEA\IDEA_COMMUNITY_2023.2\plugins\maven\lib\maven-event-listener.jar
sun.jnu.encoding = GBK
java.library.path = D:\Program\Java\jdk1.8.0_261\bin;C:\Windows\Sun\Java\bin;C:\Windows\system32;C:\Windows;c:\Users\xxxxxx\AppData\Local\Programs\Cursor\resources\app\bin;C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0\;C:\Windows\System32\OpenSSH\;C:\Program Files\DFSK 云盘;C;\Program Files (x86)\NVIDIA Corporation\PhysX\Common;D:\Program\influxdb\influxdb-1.8.4-1;D:\Program\nacos\nacos-server-2.0.3\nacos\bin;D:\Program\ActiveMQ\apache-artemis-2.19.1\bin;D:\Program\Neo4j\neo4j-community-3.5.35\bin;D:\Program\GNUWin\GnuWin32\bin;D:\Program\Arthas\lib\3.5.2\arthas;D:\Program\Apache-Tomcat\apache-tomcat-8.5.84\bin;C:\Program Files (x86)\Enterprise Vault\EVClient\x64\;D:\Program\WinMerge;C:\Program Files\dotnet\;C:\Users\xxxxxx\AppData\Local\Microsoft\WindowsApps;D:\Program\Java\jdk1.8.0_261\bin;D:\Program\Java\jdk1.8.0_261\jre\bin;D:\Program\git\cmd;D:\Program\IDEA\IDEA 2021.3.1\IntelliJ IDEA 2021.3.1\bin;D:\Program\maven\apache-maven-3.8.1\bin;D:\Program\gradle\gradle-6.8\bin;D:\Program\VSCode\bin;D:\Program\DiffUse;D:\Program\PyCharm\PyCharm2023.2.1\bin;c:\Users\;D:\Program\JMeter\apache-jmeter-5.5\bin;D:\Program\miktex\miktex-24.1\miktex\bin\x64\;D:\Program\nodejs\node-v20.11.1-win-x64;C:\insolu\client001;C:\Users\xxxxxx\AppData\Local\Microsoft\WindowsApps;D:\Program\Java\jdk1.8.0_261\bin;D:\Program\Java\jdk1.8.0_261\jre\bin;D:\Program\git\cmd;D:\Program\IDEA\IDEA 2021.3.1\IntelliJ IDEA 2021.3.1\bin;;D:\Program\maven\apache-maven-3.8.1\bin;D:\Program\gradle\gradle-6.8\bin;D:\Program\VSCode\bin;D:\Program\DiffUse;D:\Program\PyCharm\PyCharm2023.2.1\bin;;D:\Program\netcat;;.
java.class.version = 52.0
java.specification.name = Java Platform API Specification
sun.management.compiler = HotSpot 64-Bit Tiered Compilers
maven.repo.local = D:\Program_Data\maven_repository
os.version = 10.0
user.home = C:\Users\xxxxxx
user.timezone = Asia/Shanghai
java.awt.printerjob = sun.awt.windows.WPrinterJob
file.encoding = GBK
java.specification.version = 1.8
java.rmi.server.disableHttp = true
user.name = xxxxxx
java.class.path = D:\Program\IDEA\IDEA_COMMUNITY_2023.2\plugins\maven-model\lib\maven-model.jar;D:\Program\IDEA\IDEA_COMMUNITY_2023.2\plugins\maven-server\lib\maven-server.jar;D:\Program\IDEA\IDEA_COMMUNITY_2023.2\plugins\maven\lib\maven3-server-common.jar;D:\Program\IDEA\IDEA_COMMUNITY_2023.2\plugins\maven\lib\maven3-server-lib\archetype-catalog-2.2.jar;D:\Program\IDEA\IDEA_COMMUNITY_2023.2\plugins\maven\lib\maven3-server-lib\archetype-common-2.2.jar;D:\Program\IDEA\IDEA_COMMUNITY_2023.2\plugins\maven\lib\maven3-server-lib\archetype-descriptor-2.2.jar;D:\Program\IDEA\IDEA_COMMUNITY_2023.2\plugins\maven\lib\maven3-server-lib\lucene-core-2.4.1.jar;D:\Program\IDEA\IDEA_COMMUNITY_2023.2\plugins\maven\lib\maven3-server-lib\maven-dependency-tree-1.2.jar;D:\Program\IDEA\IDEA_COMMUNITY_2023.2\plugins\maven\lib\maven3-server-lib\nexus-indexer-3.0.4.jar;D:\Program\IDEA\IDEA_COMMUNITY_2023.2\plugins\maven\lib\maven3-server-lib\nexus-indexer-artifact-1.0.1.jar;D:\Program\IDEA\IDEA_COMMUNITY_2023.2\plugins\maven\lib\maven3-server.jar;D:\Program\IDEA\IDEA_COMMUNITY_2023.2\plugins\maven\lib\maven36-server.jar;D:\Program\maven\apache-maven-3.8.1\lib\cdi-api-1.0.jar;D:\Program\maven\apache-maven-3.8.1\lib\commons-cli-1.4.jar;D:\Program\maven\apache-maven-3.8.1\lib\commons-io-2.5.jar;D:\Program\maven\apache-maven-3.8.1\lib\commons-lang3-3.8.1.jar;D:\Program\maven\apache-maven-3.8.1\lib\guava-25.1-android.jar;D:\Program\maven\apache-maven-3.8.1\lib\guice-4.2.1-no_aop.jar;D:\Program\maven\apache-maven-3.8.1\lib\jansi-1.17.1.jar;D:\Program\maven\apache-maven-3.8.1\lib\javax.inject-1.jar;D:\Program\maven\apache-maven-3.8.1\lib\jcl-over-slf4j-1.7.29.jar;D:\Program\maven\apache-maven-3.8.1\lib\jsoup-1.12.1.jar;D:\Program\maven\apache-maven-3.8.1\lib\jsr250-api-1.0.jar;D:\Program\maven\apache-maven-3.8.1\lib\maven-artifact-3.8.1.jar;D:\Program\maven\apache-maven-3.8.1\lib\maven-builder-support-3.8.1.jar;D:\Program\maven\apache-maven-3.8.1\lib\maven-compat-3.8.1.jar;D:\Program\maven\apache-maven-3.8.1\lib\maven-core-3.8.1.jar;D:\Program\maven\apache-maven-3.8.1\lib\maven-embedder-3.8.1.jar;D:\Program\maven\apache-maven-3.8.1\lib\maven-model-3.8.1.jar;D:\Program\maven\apache-maven-3.8.1\lib\maven-model-builder-3.8.1.jar;D:\Program\maven\apache-maven-3.8.1\lib\maven-plugin-api-3.8.1.jar;D:\Program\maven\apache-maven-3.8.1\lib\maven-repository-metadata-3.8.1.jar;D:\Program\maven\apache-maven-3.8.1\lib\maven-resolver-api-1.6.2.jar;D:\Program\maven\apache-maven-3.8.1\lib\maven-resolver-connector-basic-1.6.2.jar;D:\Program\maven\apache-maven-3.8.1\lib\maven-resolver-impl-1.6.2.jar;D:\Program\maven\apache-maven-3.8.1\lib\maven-resolver-provider-3.8.1.jar;D:\Program\maven\apache-maven-3.8.1\lib\maven-resolver-spi-1.6.2.jar;D:\Program\maven\apache-maven-3.8.1\lib\maven-resolver-transport-wagon-1.6.2.jar;D:\Program\maven\apache-maven-3.8.1\lib\maven-resolver-util-1.6.2.jar;D:\Program\maven\apache-maven-3.8.1\lib\maven-settings-3.8.1.jar;D:\Program\maven\apache-maven-3.8.1\lib\maven-settings-builder-3.8.1.jar;D:\Program\maven\apache-maven-3.8.1\lib\maven-shared-utils-3.2.1.jar;D:\Program\maven\apache-maven-3.8.1\lib\org.eclipse.sisu.inject-0.3.4.jar;D:\Program\maven\apache-maven-3.8.1\lib\org.eclipse.sisu.plexus-0.3.4.jar;D:\Program\maven\apache-maven-3.8.1\lib\plexus-cipher-1.7.jar;D:\Program\maven\apache-maven-3.8.1\lib\plexus-component-annotations-2.1.0.jar;D:\Program\maven\apache-maven-3.8.1\lib\plexus-interpolation-1.25.jar;D:\Program\maven\apache-maven-3.8.1\lib\plexus-sec-dispatcher-1.4.jar;D:\Program\maven\apache-maven-3.8.1\lib\plexus-utils-3.2.1.jar;D:\Program\maven\apache-maven-3.8.1\lib\slf4j-api-1.7.29.jar;D:\Program\maven\apache-maven-3.8.1\lib\wagon-file-3.4.3.jar;D:\Program\maven\apache-maven-3.8.1\lib\wagon-http-3.4.3-shaded.jar;D:\Program\maven\apache-maven-3.8.1\lib\wagon-provider-api-3.4.3.jar;D:\Program\maven\apache-maven-3.8.1\boot\plexus-classworlds-2.6.0.jar;D:\Program\maven\apache-maven-3.8.1\boot\plexus-classworlds.license;D:\Program\IDEA\IDEA_COMMUNITY_2023.2\lib\util_rt.jar;D:\Program\IDEA\IDEA_COMMUNITY_2023.2\lib\annotations.jar;D:\Program\IDEA\IDEA_COMMUNITY_2023.2\lib\util-8.jar
java.naming.factory.initial = com.intellij.execution.rmi.RemoteServer$Jndi
java.vm.specification.version = 1.8
sun.arch.data.model = 64
sun.java.command = org.jetbrains.idea.maven.server.RemoteMavenServer36
java.home = D:\Program\Java\jdk1.8.0_261\jre
user.language = zh
java.specification.vendor = Oracle Corporation
awt.toolkit = sun.awt.windows.WToolkit
java.vm.info = mixed mode
java.version = 1.8.0_261
java.ext.dirs = D:\Program\Java\jdk1.8.0_261\jre\lib\ext;C:\Windows\Sun\Java\lib\ext
sun.boot.class.path = D:\Program\Java\jdk1.8.0_261\jre\lib\resources.jar;D:\Program\Java\jdk1.8.0_261\jre\lib\rt.jar;D:\Program\Java\jdk1.8.0_261\jre\lib\sunrsasign.jar;D:\Program\Java\jdk1.8.0_261\jre\lib\jsse.jar;D:\Program\Java\jdk1.8.0_261\jre\lib\jce.jar;D:\Program\Java\jdk1.8.0_261\jre\lib\charsets.jar;D:\Program\Java\jdk1.8.0_261\jre\lib\jfr.jar;D:\Program\Java\jdk1.8.0_261\jre\classes
java.awt.headless = true
java.vendor = Oracle Corporation
maven.home = D:\Program\maven\apache-maven-3.8.1
file.separator = \
java.vendor.url.bug = http://bugreport.sun.com/bugreport/
apple.awt.UIElement = true
sun.io.unicode.encoding = UnicodeLittle
sun.cpu.endian = little
java.rmi.server.hostname = 127.0.0.1
sun.desktop = windows
sun.cpu.isalist = amd64VM Flags:
Non-default VM flags: -XX:CICompilerCount=4 -XX:InitialHeapSize=264241152 -XX:MaxHeapSize=805306368 -XX:MaxNewSize=268435456 -XX:MinHeapDeltaBytes=524288 -XX:NewSize=88080384 -XX:OldSize=176160768 -XX:+UseCompressedClassPointers -XX:+UseCompressedOops -XX:+UseFastUnorderedTimeStamps -XX:-UseLargePagesIndividualAllocation -XX:+UseParallelGC
Command line: -Djava.awt.headless=true -Dmaven.defaultProjectBuilder.disableGlobalModelCache=true -Didea.version=2023.2.2 -Didea.maven.embedder.version=3.8.1 -Xmx768m -Dmaven.ext.class.path=D:\Program\IDEA\IDEA_COMMUNITY_2023.2\plugins\maven\lib\maven-event-listener.jar -Dfile.encoding=GBK
方法3：jps -v
# jps -v
jps -v
15648 RemoteMavenServer36 -Djava.awt.headless=true -Dmaven.defaultProjectBuilder.disableGlobalModelCache=true -Didea.version=2023.2.2 -Didea.maven.embedder.version=3.8.1 -Xmx768m -Dmaven.ext.class.path=D:\Program\IDEA\IDEA_COMMUNITY_2023.2\plugins\maven\lib\maven-event-listener.jar -Dfile.encoding=GBK
18928 Jps -Denv.class.path=.;D:\Program\Java\jdk1.8.0_261\lib\dt.jar;D:\Program\Java\jdk1.8.0_261\lib\tools.jar; -Dapplication.home=D:\Program\Java\jdk1.8.0_261 -Xms8m
19328 exit -XX:ErrorFile=C:\Users\xxxxxx\\java_error_in_idea64_%p.log -XX:HeapDumpPath=C:\Users\xxxxxx\\java_error_in_idea64.hprof -Xms128m -Xmx2048m -XX:ReservedCodeCacheSize=512m -XX:+UseG1GC -XX:SoftRefLRUPolicyMSPerMB=50 -XX:CICompilerCount=2 -XX:+HeapDumpOnOutOfMemoryError -XX:-OmitStackTraceInFastThrow -XX:+IgnoreUnrecognizedVMOptions -XX:CompileCommand=exclude,com/intellij/openapi/vfs/impl/FilePartNodeRoot,trieDescend -ea -Dsun.io.useCanonCaches=false -Dsun.java2d.metal=true -Djbr.catch.SIGABRT=true -Djdk.http.auth.tunneling.disabledSchemes="" -Djdk.attach.allowAttachSelf=true -Djdk.module.illegalAccess.silent=true -Dkotlinx.coroutines.debug=off -Xmx2048m -Djb.vmOptionsFile=C:\Users\xxxxxx\AppData\Roaming\\JetBrains\\IdeaIC2023.2\idea64.exe.vmoptions -Djava.system.class.loader=com.intellij.util.lang.PathClassLoader -Didea.vendor.name=JetBrains -Didea.paths.selector=IdeaIC2023.2 -Djna.boot.library.path=D:\Program\IDEA\IDEA_COMMUNITY_2023.2/lib/jna/amd64 -Dpty4j.preferred.native.folder=D:\Program\IDEA\IDEA_COM
6416 RemoteMavenServer36 -Djava.awt.headless=true -Dmaven.defaultProjectBuilder.disableGlobalModelCache=true -Didea.version=2023.2.2 -Didea.maven.embedder.version=3.8.1 -Xmx768m -Dmaven.ext.class.path=D:\Program\IDEA\IDEA_COMMUNITY_2023.2\plugins\maven\lib\maven-event-listener.jar -Dfile.encoding=GBK
2324 RemoteMavenServer36 -Djava.awt.headless=true -Dmaven.defaultProjectBuilder.disableGlobalModelCache=true -Didea.version=2023.2.2 -Didea.maven.embedder.version=3.8.1 -Xmx768m -Dmaven.ext.class.path=D:\Program\IDEA\IDEA_COMMUNITY_2023.2\plugins\maven\lib\maven-event-listener.jar -Dfile.encoding=GBK
2524 RemoteMavenServer36 -Djava.awt.headless=true -Dmaven.defaultProjectBuilder.disableGlobalModelCache=true -Didea.version=2023.2.2 -Didea.maven.embedder.version=3.8.1 -Xmx768m -Dmaven.ext.class.path=D:\Program\IDEA\IDEA_COMMUNITY_2023.2\plugins\maven\lib\maven-event-listener.jar -Dfile.encoding=GBK
X 参考文献
- JDK如何判断自己是什么公司的 - CSDN
- 常用java 命令行命令的使用及示例 - CSDN
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