赋值

package com.me.base;/*** 验证对象赋值是操作引用* * &＃64;author scyking**/
public class Assignment {public static void main(String[] args) {People people1 &＃61; new People();People people2 &＃61; new People();people1.setAge(17);people2.setAge(57);// output:"people1 age:17;people2 age:57"System.out.println("people1 age:" &＃43; people1.getAge() &＃43; ";people2 age:" &＃43; people2.getAge());// 将people1的引用指向people2对象。即people1、people2引用相同对象&＃xff0c;而原people1引用对象不再被引用&＃xff0c;会被gc回收。people1 &＃61; people2;// output:"people1 age:57;people2 age:57"System.out.println("people1 age:" &＃43; people1.getAge() &＃43; ";people2 age:" &＃43; people2.getAge());// 此时people1引用已指向people2对象&＃xff0c;修改现people1引用对象的值时&＃xff0c;people2引用对象得相应值也会变化。&＃xff08;别名现象&＃xff09;people1.setAge(25);// output:people1 age:25;people2 age:25System.out.println("people1 age:" &＃43; people1.getAge() &＃43; ";people2 age:" &＃43; people2.getAge());// 避免别名现象People people3 &＃61; new People();People people4 &＃61; new People();people3.setAge(17);people4.setAge(57);// output:"people3 age:17;people4 age:57"System.out.println("people3 age:" &＃43; people3.getAge() &＃43; ";people4 age:" &＃43; people4.getAge());// people3.age &＃61; people4.age
people3.setAge(people4.getAge());// output:"people3 age:57;people4 age:57"System.out.println("people3 age:" &＃43; people3.getAge() &＃43; ";people4 age:" &＃43; people4.getAge());people3.setAge(25);// output:"people3 age:25;people4 age:57"System.out.println("people3 age:" &＃43; people3.getAge() &＃43; ";people4 age:" &＃43; people4.getAge());// 不变类String str1 &＃61; "str1";String str2 &＃61; "str2";str1 &＃61; str2;// output:"str1:str2;str2:str2"System.out.println("str1:" &＃43; str1 &＃43; ";str2:" &＃43; str2);}}