Learn how to use the `case` keyword in Java for efficient switch statements. This guide covers syntax, examples, and best practices to simplify your code. Perfect for Java developers.
/bin/bashread-p"请输入你要的动作:"actioncase$actioninstart|S)echo"service is running...";;stop|T)echo"service is stoped...";;reload|R)echo"service is restart...";;*)echo"请输入你要的动作";;esac $1:脚本后面的第一个参数。 二、函数 shell中允许将一组命令集合或语句形成一段可用代码,...
,在END IF后需要加上分号“;”以表示语句结束,其他语句如CASE、LOOP等也是相同的。...CASE 表达式 select CASE sva WHEN 1 THEN '男' ELSE '女' END as ssva from taname where sva !...参考资料: 1、Mysql if case总结 2、Leetcode swap salary 3、select case when if 的一些用法 4、IF Syntax...
根据那些基本的编译理论中最精华的部分,您可以得知一个语言处理器(包括解释器和编译器)的基本运算至少由两个阶段组成: 解析器,用于获取输入的文本并将其转换成 Abstract Syntax Tree(AST)。 代码生成器(在编译器的情况下),用于获取 AST 并从中生成所需字节码;或是求值器(在解释器的情况下),用于获取 AST 并计算...
Its syntax is: string.toLowerCase(Locale locale) If you do not pass thelocaleparameter, the default locale,Locale.getDefault(), is used. To learn more, visitJava toLowerCase() With Locale. To convert all characters in a string to upper case characters, use theJava String toUpperCase() me...
[mysql]> helpcaseoperator; #case的第二种基本用法24Name: 'CASE OPERATOR'25Description:26Syntax:27CASE value WHEN [compare_value] THEN result [WHEN [compare_value] THEN28result ...] [ELSE result] END2930CASE WHEN [condition] THEN result [WHEN [condition] THEN result ...]31[ELSE result] ...
public java.lang.Object visit(SyntaxObjectVisitor visitor, java.lang.Object context) Calls the visitAggregationCase method of the SyntaxObjectVisitor and passes that method this AggregationCase and an Object. Specified by: visit in class SyntaxObject Parameters: visitor - A SyntaxObjectVisitor...
syntaxClosed=true;break; } }if(!syntaxClosed) {thrownewSyntaxException("语法错误:case..when..未闭合"); } } 以上,就是获取case..when..词组的方法了,主要就是从case开始,到end结束,中间的所有词根,都被划作其范围。当然,还有一个重要的点,是将数据字段找出来,放到可取到的地方。
Cancel Create saved search Sign in Sign up Reseting focus {{ message }} juntt / MiaoShaCase Public Notifications You must be signed in to change notification settings Fork 9 Star 14 聚焦Java性能优化 打造亿级流量秒杀系统 License MIT license 14 stars ...
The firstCASEsyntax returns theresultfor the first ***value***=***compare_value***comparison that is true. The second syntax returns the result for the first condition that is true. If no comparison or condition is true, the result afterELSEis returned, orNULLif there is noELSEpart. ...