标签：
Java中方法参数传递是：值传递(Pass By Value)
public class ParameterDemo{ public void changeValue1(int a){ a = 8; } public void changeValue2(Employee e){ e.salary = 8000; } public void changeValue3(Employee e){ e = new Employee(); e.salary = 8000; } public void swap(Employee e, Employee e2){ Employee temp = e; e = e2; e2 = temp; } public static void main(String[] args){ MethodDemo m = new MethodDemo(); int a = 10; System.out.println(a);//10 m.changeValue1(a); System.out.println(a);//10 Employee e = new Employee(); System.out.println(e.salary);//0 m.changeValue2(e); System.out.println(e.salary);//8000 Employee e2 = new Employee(); System.out.println(e2.salary);//0 m.changeValue3(e2); System.out.println(e2.salary);//0 Employee e3 = new Employee(); e3.name = "huhu"; Employee e4 = new Employee(); e4.name = "hengheng"; System.out.println("e3.name = "+e3.name+" e4.name = "+ e4.name);//e3.name = huhu e4.name = hengheng m.swap(e3, e4); System.out.println("e3.name = "+e3.name+" e4.name = "+ e4.name);//e3.name = huhu e4.name = hengheng }}class Employee{ String name; int salary;}标签：
原文地址：http://www.cnblogs.com/liqiong/p/4268350.html
