equalsw 重写后无法判断属性值

Question

package Equals的用法;

public class Phone1 {

public int cpu = 2;

public void say() {

System.out.println("我是手机");

}

}

package Equals的用法;

public class Phone2 {

public int cpu = 2;

public void say() {

System.out.println("我是手机");

}

public boolean equals(Object obj) {

if (this == obj)

return true;

if (obj == null)

return false;

if (getClass() != obj.getClass())

return false;

Phone2 other = (Phone2) obj;

if (cpu != other.cpu)

return false;

return true;

}

}

package Equals的用法;

public class User {

public static void main(String[] args) {

Phone1 aPhone1 = new Phone1();

Phone2 aPhone2 = new Phone2();

if (aPhone1.equals(aPhone2)) {

System.out.println("比较的是对象的地址: 一样");

} else {

System.out.println("比较的是对象的地址: 不一样");

}

if (aPhone2.equals(aPhone1)) {

System.out.println("比较的是对象的属性: 一样");

} else {

System.out.println("比较的是对象的属性: 不一样");

}

}

}

Answer 1

aphone1和aphone2的类型都不一样，一个是Phone1，一个是Phone2，上来比较就会return false比较的应该是同一类型的两个对象Phone2 aPhone1 = new Phone2();Phone2 aPhone2 = new Phone2();这样的aPhone1和aPhone2比较才有意义