1 class Person{
2 private String name ;
3 private int age;
4 public Person(String name,int age) {
5 this.name = name;
6 this.age = age;
7 }
8 // public int hashCode() {
9 // return super.hashCode();
10 // }
11 public int hashCode() {
12 return this.age;
13 }
14 public String toString() {
15 return "姓名"+this.name+","+"年龄"+this.age;
16 }
17 //多态 子类对象赋值给父类变量
18 public boolean equals(Object obj) {//Object obj = new Person("王强",12);
19 Person p = (Person)obj;//向下强转 父类变量 obj 赋值给 子类变量
20 return this.age == p.age;
21 }
22 }
23 public class Demo1 {
24 public static void main(String[] args) {
25 Person p1 = new Person("王二",12);
26 Person p2 = new Person("王强",12);
27 System.out.println(p1);//toString 方法默认是返回包名.类名 @对象的哈希码
28 System.out.println(p1.equals(p2));//equals 默认的是放回俩个对象的地址是否相同
29
30 System.out.println(p1.hashCode());
31 System.out.println(p2.hashCode());
32 }
33 }
