检查JAVA_HOME使用批处理脚本是present环境 [英] Check if JAVA_HOME is present in environment using batch script

问题描述

我要检查JAVA_HOME是否present环境或不
所以我写了下面的脚本 a.bat

I want to check whether JAVA_HOME is present in environment or not So I wrote the below script a.bat

if "%JAVA_HOME%" == "" 
(
echo Enter path to JAVA_HOME: 
set /p javahome=
)
if not "%JAVA_HOME%" == ""
(
echo %JAVA_HOME%
)

显示命令的语法不正确我在哪里去了？

It shows "The syntax of the command is incorrect" where am i going wrong?

推荐答案

试试这个：

@echo off
IF "%JAVA_HOME%" == "" (
    echo Enter path to JAVA_HOME: 
    set /p JAVA_HOME=
) ELSE (
    echo %JAVA_HOME%
)

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