Check if JAVA_HOME is present in environment using batch script

Question

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%
)

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

score 19 · Accepted Answer · answered Aug 11 '11 at 06:49

19

Try this:

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

answered Aug 11 '11 at 06:49

dertkw

7,798
5
37
45

1

Doesn't fly for windows 10 – Matas Vaitkevicius May 13 '16 at 08:30

score 2 · Answer 2 · answered Aug 27 '11 at 07:13

2

if not defined JAVA_HOME (
    :undefined
    set /p JAVA_HOME=Enter path to JAVA_HOME:
    if not defined JAVA_HOME goto:undefined
 )
echo %JAVA_HOME%

answered Aug 27 '11 at 07:13

walid2mi

2,704
15
15

This requires command extensions so you might want to explicitly set those first even though they are on by default. SETLOCAL ENABLEEXTENSIONS IF ERRORLEVEL 1 ECHO Unable to enable extensions – opticyclic Jan 22 '16 at 03:51

Check if JAVA_HOME is present in environment using batch script

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