Quick Switching Method for JDK Versions (2024)

1. Download JDK

Go to the official website to download the corresponding jdk version and install it. I have installed three of them: 8, 17, 23.

2. Configure environment variables

1. The first environment variable

Variable name: JAVA_HOME
Variable value: C:\Program Files\Java\jdk-8

2. The second environment variable

Variable name: JAVA8_HOME
Variable value: C:\Program Files\Java\jdk-8

3. The third environment variable

Variable name: JAVA17_HOME
Variable value: C:\Program Files\Java\jdk-17

4. The fourth environment variable

Variable name: JAVA23_HOME
Variable value: C:\Program Files\Java\jdk-23

Create new environment variables in Path,

%JAVA_HOME%\bin

Check the environment variables of Path, add them if there is no, change it to %JAVA_HOME%\bin and move up to the first one

3. Write .bat scripts

The paths of all the guys are changed to their actual paths!!!

@echo off
setlocal

:menu
cls
echo ============================
echo Select the JDK version to use:
echo ============================
echo 1. JDK 8 (C:\Program Files\Java\jdk1.8.0_191)
echo 2. JDK 17 (C:\Program Files\Java\jdk-17)
echo 3. JDK 23 (C:\Program Files\Java\jdk-23)
echo Q. Quit
echo ============================
set /p choice="Enter your choice (1, 2, 3 or Q): "

if /i "%choice%"=="Q" goto :eof

REM set up JAVA_HOME The path corresponding to the target version
if "%choice%"=="1" (
    set "JAVA_HOME=C:\Program Files\Java\jdk1.8.0_191"
) else if "%choice%"=="2" (
    set "JAVA_HOME=C:\Program Files\Java\jdk-17"
) else if "%choice%"=="3" (
    set "JAVA_HOME=C:\Program Files\Java\jdk-23"
) else (
    echo Invalid choice. Please try again.
    pause
    goto :menu
)

REM verify JAVA_HOME Does it exist
if not exist "%JAVA_HOME%" (
    echo The specified JDK path does not exist: %JAVA_HOME%
    pause
    exit /b 1
)

REM Update system environment variables JAVA_HOME and Path
setx JAVA_HOME "%JAVA_HOME%" /M
REM setx PATH "%JAVA_HOME%\bin;%PATH%" /M

REM Update the current session JAVA_HOME and Path
set "JAVA_HOME=%JAVA_HOME%"
REM set "PATH=%JAVA_HOME%\bin;%PATH%"

echo Switched to JDK %choice%
echo JAVA_HOME is now set to %JAVA_HOME%

pause
endlocal

4. Administrator permissions to execute .bat file

Execute the .bat file,Reopen a new cmd terminal, and then enter java -version to see if the switch is successful

Summarize

This is all about this article about the quick switching method of JDK version. For more related content on quick switching of JDK version, please search for my previous articles or continue browsing the related articles below. I hope everyone will support me in the future!