By: Jan Mat?rne

Jan Mat?rne — Tue, 16 May 2006 00:11:33 +0000

Maybe not as dynamic as yours (and for Windows) - but used the same technique for over a year and it works well. So I could compile Ant on a 1.2 or a 1.5 base (nice to see all the 1.5-deprecated stuff which was ‘new’ in 1.2).

@echo off
set JAVA_BASE=c:\jdk
if “%1″==”help” goto help

set JHOME=%JAVA_BASE%\%1
if “%1″==”160″ set JHOME=%JAVA_BASE%\160_2004Nov
if “%1″==”150″ set JHOME=%JAVA_BASE%\150
….
if “%1″==”" set JHOME=C:\Programme\Java\j2sdk1.4.2_04
goto end

:help
echo setjava - Set the Java-Version
echo .
echo 1.4.2_04
echo 15 160 160_snap 1.6.0-Snapshot
echo 15 150 150_b2 1.5.0
…
goto end2

:end
if exist %JHOME%\bin\javac.exe goto setJavaHome
echo %JHOME%\bin\javac.exe not found. No changes done.
goto end2

:setJavaHome
set JAVA_HOME=%JHOME%
call cleanPath.pl PATH _clean_.bat -add %JAVA_HOME%\bin -del jdk
call _clean_.bat
del _clean_.bat
echo Java-Home: %JAVA_HOME%
call java -version
goto end2

:end2
set JAVA_BASE=
set JHOME=

Oh the ‘cleanPath.pl’ is a small perl skript which can add and remove entries (regexp based) from the PATH variable. Nice to clean that stuff …

By: Ian Holsman

Ian Holsman — Mon, 15 May 2006 20:15:07 +0000

Thanks!
I was looking for something like this so I could run opentaps on my laptop (which required 1.4.2) and solr (which needs 1.5)

Comments on: OS X Java version changing script

By: Jan Mat?rne

By: Ian Holsman