复制代码 代码如下:

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;

}

}

复制代码 代码如下:

package Object.reference;

/* java 中的值传递和引用传递

http://www.jb51.net/clara/archive/2011/09/17/2179493.html

java 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

}

}