From ae87d6d972b78cbf7559e46b2303412a1407256e Mon Sep 17 00:00:00 2001
From: xuxin <840198532@qq.com>
Date: Sat, 30 May 2026 16:28:23 +0800
Subject: [PATCH] =?UTF-8?q?javaSE-day01-Objects=E5=B7=A5=E5=85=B7=E7=B1=BB?=
 =?UTF-8?q?=E7=9A=84equals=E6=96=B9=E6=B3=95?=
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---
 .../src/com/inmind/objects02/Demo04.java      | 28 +++++++++++++++++++
 1 file changed, 28 insertions(+)
 create mode 100644 javaSE-day01/src/com/inmind/objects02/Demo04.java

diff --git a/javaSE-day01/src/com/inmind/objects02/Demo04.java b/javaSE-day01/src/com/inmind/objects02/Demo04.java
new file mode 100644
index 0000000..d5edc74
--- /dev/null
+++ b/javaSE-day01/src/com/inmind/objects02/Demo04.java
@@ -0,0 +1,28 @@
+package com.inmind.objects02;
+
+import com.inmind.object01.Person;
+
+import java.util.Objects;
+
+/*
+    4.Objects类的equals方法
+    static boolean equals(Object a, Object b) 返回 true如果参数相等，彼此 false否则。
+
+    Objects类的equals方法的作用:在实现判断2个对象是否相同的基础上,有效地避免空指针异常
+ */
+public class Demo04 {
+    public static void main(String[] args) {
+        Person p1 = new Person("张三", 20);
+        Person p2 = new Person("张三", 20);
+        //普通的判断写法
+        System.out.println(p1.equals(p2));//true
+        //不小心，将p1初始化了
+//        p1 = null;
+
+        /*if (p1 != null){
+            System.out.println(p1.equals(p2));
+        }*/
+        System.out.println(Objects.equals(p1, p2));
+        //请问Objects.equals，它本身有比较内容的功能吗？？？没有，它使用的是p1对象的equals方法
+    }
+}