From 2826fd011a418874698aa81b84ff5a8b7f6cf41d Mon Sep 17 00:00:00 2001
From: xuxin <840198532@qq.com>
Date: Thu, 16 Jul 2026 10:58:05 +0800
Subject: [PATCH] =?UTF-8?q?day02-=E8=BF=90=E7=AE=97=E7=AC=A6=5F=E9=80=BB?=
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---
 day02/src/com/inmind/yunsuan02/Demo11.java | 42 ++++++++++++++++++++++
 1 file changed, 42 insertions(+)
 create mode 100644 day02/src/com/inmind/yunsuan02/Demo11.java

diff --git a/day02/src/com/inmind/yunsuan02/Demo11.java b/day02/src/com/inmind/yunsuan02/Demo11.java
new file mode 100644
index 0000000..f628cc0
--- /dev/null
+++ b/day02/src/com/inmind/yunsuan02/Demo11.java
@@ -0,0 +1,42 @@
+package com.inmind.yunsuan02;
+/**
+ 逻辑运算符：
+ &&  短路与  并且
+ ||  短路或  或者
+ ！   取反
+
+ 注意：&& 和 ||其实是有短路效果的（也就是对应的结果已经确定，那么后面的代码不会执行!!!!）
+ */
+public class Demo11 {
+    public static void main(String[] args) {
+        //双与 :一假即假
+        System.out.println(true&&true   );//true
+        System.out.println(false&&true);//false
+        System.out.println(true&&false);//false
+        System.out.println(false&&false);//false
+        System.out.println("---------------");
+
+        //双或 :一真即真
+        System.out.println(true||true);//true
+        System.out.println(false||true);//true
+        System.out.println(true||false);//true
+        System.out.println(false||false);//false
+        System.out.println("---------------");
+        //! 取反
+        System.out.println(!false);//true
+        System.out.println(!true);//false
+
+        //常见的情况如下
+        int a = 88;
+        int b = 88;
+        System.out.println((a==100)&&(b==100));//true
+        //如果有一门是95分以上，就带你去玩
+        System.out.println((a>=95)||(b>=95));//true
+        System.out.println("--------------------------------------");
+        int i = 10;
+        int j = 20;
+        System.out.println(--i<10 && j++>10);//true
+        System.out.println(i);//9
+        System.out.println(j);//21
+    }
+}