数组的简单操作
public class arrayDemo03 {public static void main(String[] args) {int[] array = {1,2,3,4,5};//打印数组元素for (int i = 0; i < array.length; i++) {System.out.println(array[i]);}//计算所有元素的和int sum = 0;for (int i = 0; i < array.length; i++) {sum += array[i];}System.out.println("数组的和为：" + sum);//查找最大元素int max = array[0];for (int i = 0; i < array.length; i++) {if (max < array[i]){max = array[i];}}System.out.println("数组中最大元素为" + max);}
}
public class arrayDemo04 {public static void main(String[] args) {int[] arrays = {1,2,3,4,5};// for-each 增强型for循环 适合打印输出，不适合造作内部元素// 数组名.for 可在idea中自动生成 JDK1.5版本以上才可以实现 无法对下标进行操作for (int array : arrays) {System.out.println(array);}printArray(arrays);System.out.println();int[] result = reverse(arrays);for (int i = 0; i < result.length; i++) {System.out.print( result[i] + " ");}}// 反转数组public static int[] reverse(int[] arrays){int [] result = new int[arrays.length];for (int i = arrays.length-1,j=0; i < arrays.length && j < arrays.length; i--,j++) {result[j] = arrays[i];}return result;}//打印数组元素public static void printArray(int[] arrays){for (int i = 0; i < arrays.length; i++) {System.out.print( arrays[i] + " ");}}}
