changeJavaVersion.bat

:: set Java versions (permanently with setx and not only for console with set)
@echo off
echo.

IF "%1" == ""       GOTO NoParams
IF "%1" == "8"      GOTO J8
IF "%1" == "17"     GOTO J17
IF "%1" == "latest" GOTO latest

IF "%1" == "-h"         GOTO help
IF "%1" == "--help"     GOTO help

:NoParams
    echo Enter Java version
    GOTO options
    
:help
    echo Usage: javaVer [java version]
    GOTO options

:: available java versions
:options
    echo options: 8, 17, latest.
    GOTO exit

:: java 8
:J8
    setx JAVA_HOME=C:\Program Files\AdoptOpenJDK\jre-8.0.282.8-hotspot
    GOTO activate

:: java 17
:J17
    setx JAVA_HOME=C:\P\Java\AdoptOpenJdk_temurin-17.0.6
    GOTO activate

:: latest java version
:latest
    setx JAVA_HOME=C:\Program Files\Java\j21
    GOTO activate

:: activates the selected java version
:activate
    set Path=%JAVA_HOME%\bin;%Path%
    echo Java %1 activated.
    GOTO exit

:: prints java version
:exit
    echo.
    echo Current Java version:
    java -version