摘要： public class ChangeTest { public void changeMethodA(int a, int b){ System.out.println("changeMethodA交换之前\ta:"+a+"\tb:"+b); a = a + b - (b = a); System.out.println("changeMethodA交换之后\ta:"+a+"\tb:"+b); } public void changeMethodB(int a, int ... 阅读全文