StringBuffer作为参数传递

package com.shujia.day11;public class stringBufferDemo1 {public static void main(String[] args) {String s1 = "hello";//StringBuffer作为参数传递StringBuffer sb1 = new StringBuffer("hello");StringBuffer sb2 = new StringBuffer("world");System.out.println("sb1: "+sb1+", sb2: "+sb2);fun1(sb1,sb2);System.out.println("sb1: "+sb1+", sb2: "+sb2);}public static void fun1(StringBuffer sb1,StringBuffer sb2){sb1 = sb2;sb2.append(sb1);System.out.println("sb1: "+sb1+", sb2: "+sb2);}
}
结果为
sb1: hello, sb2: world
sb1: worldworld, sb2: worldworld
sb1: hello, sb2: worldworld