很简单，反复读两遍
1 package com.corn.objectsummary;
2
3 public class User {
4
5 private int uid;
6 private String name;
7 private int age;
8
9 public int getUid() {
10 return uid;
11 }
12
13 public void setUid(int uid) {
14 this.uid = uid;
15 }
16
17 protected String getName() {
18 return name;
19 }
20
21 public void setName(String name) {
22 this.name = name;
23 }
24
25 public int getAge() {
26 return age;
27 }
28
29 public void setAge(int age) {
30 this.age = age;
31 }
32
33 @Override
34 public boolean equals(Object obj) {
35 if (obj == null || !(obj instanceof User)) {
36 return false;
37 }
38 if (((User) obj).getUid() == this.getUid()) {
39 return true;
40 }
41 return false;
42 }
43 }
1 package com.corn.objectsummary;
2
3 public class ObjectTest implements Cloneable {
4
5 public static void main(String[] args) {
6 User u1 = new User();
7 u1.setUid(111);
8 u1.setName("张三");
9
10 User u2 = new User();
11 u2.setUid(111);
12 u2.setName("张三丰");
13
14 System.out.println(u1.equals(u2)); //返回true
15 }
16 }