Java中的值传递和引用传递

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java 中没有引用传递，都是值传递的,可以通过传递副本修改对象的,副本交换，并不影响原引用



package Object.reference;public class People {private String name;private int age;public People(){}public People(String name, int age) {super();this.name = name;this.age = age;}public String toString(){return "name:" + name + " age:" + age;}public String getName() {return name;}public int getAge() {return age;}public void setName(String name) {this.name = name;}public void setAge(int age) {this.age = age;}}

package Object.reference;/*  java 中的值传递和引用传递http://www.cnblogs.com/clara/archive/2011/09/17/2179493.htmljava 中没有引用传递，都是值传递的*/public class Test {public static void swap(People a, People b, boolean flag) {if (flag) {// 可以通过传递副本修改对象的值a.setName("changeName");a.setAge(100);} else {//副本交换，并不影响主程序的指针People c = a;a = b;b = c;}}public static void main(String[] args) {People p1 = new People("yingjie", 23);People p2 = new People("yuexin", 20);swap(p1, p2,false);//传递的是p1,p2的副本，函数调用前后p1,p2没任何改变swap(p1, p2,true);//传递的是p1,p2的副本，可以通过传递副本修改对象的值,函数调用前后p1对象内容改变}}

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