privatestaticvoidtest(Status status){int result=0;switch(status){caseOPEN:result=1;break;casePROCESS:result=2;break;casePENDING:result=2;break;caseCLOSE:result=3;break;default:thrownewRuntimeException("状态不正确");}System.out.println("result is "+result);} Java 14+ 后可以这样用: 代码语言:...
首先import java.util.Scanner;表示导入java.util包里的Scanner类。import也就是输入的意思。 需要注意的是:import 只能导入包所包含的类,而不能导入包。为了方便,我们基本不导入单独的类,而是导入包下所有的类,例如 import java.util.*; 补充:Java中的一个包就是一个类库单元,包内包含有一组类,它们在单一的名...
在讲解分支语句前,我们先来了解一个概念——块(block),块(复合语句)指的是由一对大括号{}括起来的若干条简单的java语句。例如,public class Tset5{...}大括号里面包含的就是块了,块可以嵌套,例如 public class Test5{ public static void main{ } } Java中可以分为if语句和switch语句两种分支语句,下面我们...
1. 理解switch语句 Java 中的switch语句是一种控制结构,允许根据不同的条件执行不同的代码块。其基本语法如下: switch(expression){casevalue1:// code blockbreak;casevalue2:// code blockbreak;default:// default block} 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 2. 模拟范围判断 虽然switch不能直接用...
“`java switch (expression) { case constant1: // code block 1 break; case constant2: // code block 2 break; case constant3: // code block 3 break; … default: // default code block break; } “` –expression为一个表达式,它的值会与每个case后面的常量进行比较。
Although most of theswitchstatements in real life imply that only one of thecaseblocks should be executed, thebreakstatement is necessary to exit aswitchafter the block completes. If we forget to write abreak, the blocks underneath will be executed. ...
When JavaScript reaches abreakkeyword, it breaks out of the switch block. This will stop the execution inside the switch block. It is not necessary to break the last case in a switch block. The block breaks (ends) there anyway. Note:If you omit the break statement, the next case will ...
Theswitchkeyword in Java is used to execute one block of code among many alternatives. It is a control statement that allows the variable to be tested for equality against a list of values, each with its own block of code. Usage
<template> <el-switch style="display: block" v-model="value" active-color="#13ce66" inactive-color="#ff4949" active-text="上架" inactive-text="下架"> </el-switch> </template> export default { data(){ return { value: true } } } 效果图: Switch 常用的事件为 change,即点击开关...
The optionaldefaultcase acts as a catch-all, executing its code block if none of the specified cases match the value of the variable. Output: Weekday Use the Arrow Syntax to Use Multiple Values for Oneswitch-caseStatement Java 14 introduces a new syntax for theswitch-casestatement. Users can...