From 547a7ce1d0a6e0b502806dcb0be655517c8c8ba2 Mon Sep 17 00:00:00 2001
From: xuxin <840198532@qq.com>
Date: Mon, 26 Jan 2026 14:02:58 +0800
Subject: [PATCH] =?UTF-8?q?=E8=BF=9B=E9=98=B6day01-Object=E7=B1=BB?=
 =?UTF-8?q?=E7=9A=84equals=E6=96=B9=E6=B3=95=E7=9A=84=E9=87=8D=E5=86=99?=
 =?UTF-8?q?=E5=AE=9E=E7=8E=B0?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .../src/com/inmind/object01/Demo02.java       | 17 ++++++++
 .../src/com/inmind/object01/Person.java       | 41 +++++++++++++++++++
 .../src/com/inmind/object01/Student.java      |  1 +
 3 files changed, 59 insertions(+)

diff --git a/javaSE-day01/src/com/inmind/object01/Demo02.java b/javaSE-day01/src/com/inmind/object01/Demo02.java
index d88b6ea..13603ff 100644
--- a/javaSE-day01/src/com/inmind/object01/Demo02.java
+++ b/javaSE-day01/src/com/inmind/object01/Demo02.java
@@ -10,6 +10,16 @@ boolean equals(Object obj) 判断2个对象的内容是否相同
     equals：比较的是内容
 
 注意：每个引用数据类型都默认直接或者间接继承Object，也就是说每个引用类型都有它的equals方法
+
+Object类底层equals源码：
+    public boolean equals(Object obj) {
+        return (this == obj);
+    }
+
+ 如果父类的内容比较功能，不符合子类需求，那就重写equals方法即可
+
+总结：每个对象的equals方法继承自Object类，默认使用==比较地址值，这个对于我们而言，不满足咱们需求
+     因此我们会在每个类中重写equals方法，不用手动写，直接alt+insert自动生成
  */
 public class Demo02 {
     public static void main(String[] args) {
@@ -18,6 +28,13 @@ public class Demo02 {
 
         System.out.println(str1 == str2);//false,比较的是地址
         System.out.println(str1.equals(str2));//true,比较的是内容
+        System.out.println("-------------------------------");
+        //一般在开发中，自定义类的对象也会进行比较
+        Person p1 = new Person("张三", 18);
+        Person p2 = new Person("张三", 18);
 
+        System.out.println(p1 == p2);//false
+        //false,希望是true，但是底层源码是==比较地址，false
+        System.out.println(p1.equals(p2));//true
     }
 }
diff --git a/javaSE-day01/src/com/inmind/object01/Person.java b/javaSE-day01/src/com/inmind/object01/Person.java
index 03c395f..10f1fd1 100644
--- a/javaSE-day01/src/com/inmind/object01/Person.java
+++ b/javaSE-day01/src/com/inmind/object01/Person.java
@@ -1,9 +1,18 @@
 package com.inmind.object01;
 
+import java.util.Objects;
+
 public class Person {
     String name;
     int age;
 
+    public Person() {
+    }
+
+    public Person(String name, int age) {
+        this.name = name;
+        this.age = age;
+    }
 
     @Override
     public String toString() {
@@ -12,4 +21,36 @@ public class Person {
                 ", age=" + age +
                 '}';
     }
+
+    /*@Override
+    public boolean equals(Object obj) {
+        //比较双方是否是地址相同，是否是同一个对象，如果是，那么不用比较一定是同一个
+        if (this == obj) {
+            return true;
+        }
+        //如果地址不相同，那么就要比较内容是否相同
+        //要先比较类型是否相同
+        if (obj instanceof Person) {
+            //如果都是Person，那么比较属性内容
+            Person p = (Person) obj;
+            if (this.age == p.age && this.name.equals(p.name)) {
+                return true;
+            }
+        } else {
+            //如果不是Person，那么不需要比较，肯定不同
+            return false;
+        }
+
+        return false;
+    }*/
+
+    //alt+insert自动生成的equals方法
+    @Override
+    public boolean equals(Object o) {
+        if (o == null || getClass() != o.getClass()) return false;
+        Person person = (Person) o;
+        return age == person.age && Objects.equals(name, person.name);
+    }
+
+
 }
diff --git a/javaSE-day01/src/com/inmind/object01/Student.java b/javaSE-day01/src/com/inmind/object01/Student.java
index 2bf66ee..b26ded4 100644
--- a/javaSE-day01/src/com/inmind/object01/Student.java
+++ b/javaSE-day01/src/com/inmind/object01/Student.java
@@ -2,6 +2,7 @@ package com.inmind.object01;
 
 public class Student extends Person{
 
+
     @Override
     public String toString() {
         return "Student{" +