如果存在和批处理

Question

我如何在此添加和Else选项说：
您没有java开发工具包请选择选项4？

FOR /R "C:\Program Files" %%a IN (.) DO (
    IF EXIST "%%~a\javac.exe" ECHO You Have The Java Dev Kit Ignore Option 4
) 

Answer 1

您需要搜索所有子目录以确定它是否存在。

set found=0
FOR /R "C:\Program Files" %%a IN (.) DO (
    IF EXIST "%%~a\javac.exe" set found=1
)
if %found%==0 (
   ECHO You don't have the java dev kit please select option 4
) ELSE (
   echo Found javac.exe
)

Answer 2

SET found=0
FOR /R "C:\Program Files" %%a IN (.) DO (
    IF EXIST "%%~a\javac.exe" ( ECHO You Have The Java Dev Kit Ignore Option 4 
    SET found=1)
) 
IF %found%==0 ( ECHO You don't have the java dev kit please select option 4 )

如果您想要ELSE，则必须使用(和)括号。