day02-运算符_逻辑运算符和短路效果
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42
day02/src/com/inmind/yunsuan02/Demo11.java
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42
day02/src/com/inmind/yunsuan02/Demo11.java
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package com.inmind.yunsuan02;
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/**
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逻辑运算符:
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&& 短路与 并且
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|| 短路或 或者
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! 取反
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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!!!!)
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*/
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public class Demo11 {
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public static void main(String[] args) {
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//双与 :一假即假
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System.out.println(true&&true );//true
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System.out.println(false&&true);//false
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System.out.println(true&&false);//false
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System.out.println(false&&false);//false
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System.out.println("---------------");
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//双或 :一真即真
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System.out.println(true||true);//true
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System.out.println(false||true);//true
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System.out.println(true||false);//true
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System.out.println(false||false);//false
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System.out.println("---------------");
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//! 取反
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System.out.println(!false);//true
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System.out.println(!true);//false
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//常见的情况如下
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int a = 88;
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int b = 88;
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System.out.println((a==100)&&(b==100));//true
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//如果有一门是95分以上,就带你去玩
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System.out.println((a>=95)||(b>=95));//true
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System.out.println("--------------------------------------");
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int i = 10;
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int j = 20;
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System.out.println(--i<10 && j++>10);//true
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System.out.println(i);//9
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System.out.println(j);//21
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}
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}
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