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It is absolutely possible to install side-by-side several JRE/JDK versions. Moreover, you don't have to do anything special for that to happen, as Sun is creating a different folder for each (under Program Files). There is no control panel to check which JRE works for each application.
- Step 1: Installing Multiple Java Versions
- Step 2: Define Java Environment Variables
- Step 3: Install The Scripts to Change The Java Version
- Step 4: Add The Script Directory to The Path
- Temporary and Permanent Java Version Changes
- What You Should Do Next…
Installing multiple Java versions in parallel is incredibly easy in Windows. You can download and run the installer for each version, which automatically installs the versions in separate directories.
The following two environment variables decide which Java version an application uses: 1. JAVA_HOME– many start scripts use this variable. 2. Path – is used when running a Java binary (such as java and javac) from the console. These variables should always point to the same Java installation to avoid inconsistencies. Some programs, such as Eclipse,...
To change the Java version on the command line, I have prepared some batch files that you can copy to your system. Here is the link: scripts-up-to-java23.zip The ZIP file contains scripts named 1. java22.bat, java21.bat, java20.bat, etc., for all Java versions, 2. the corresponding files java20.ps1, java19.ps1, etc. for PowerShell, 3. plus two comm...
To be able to call the scripts from anywhere, you have to add the directory to the "Path" environment variable (just like you did with "%JAVA_HOME%\bin" in the second step): If you have installed the latest releases of all Java versions, you can use the scripts without any further adjustments. Open a new command line or PowerShell and enter, for in...
The commands presented up to this point only affect the currently opened command line or PowerShell. As soon as you open another command line, the default version defined in step 2 is active again (Java 22, if you have not changed anything). If you want to change the Java version permanently, just add the parameter "perm" to the corresponding comma...
I hope you were able to follow the instructions well and that the commands work for you. Now I would like to hear from you: Were you able to follow the steps well – or do you have unanswered questions? Either way, let me know by leaving a comment below.
Nov 18, 2014 · Set all the java versions you need as separate variables. Java_8_home-> Points to Java 8 Location in local; Java_11_home -> Points to Java 11 Location in local; Java_17_home -> Points to Java 17 Location in local; Java_Home-> This points to the java version you want to use; Run in power shell to update the version to 8 update_java_version 8 $True
- The set command only works for the current terminal. To permanently set a system or user environment variable you can use setx . You can set the va...
- In case if someone want to switch frequently in each new command window then I am using following approach. Command Prompt Version: Create batch fi...
- Open Environment Variables editor (File Explorer > right click on This PC > Properties > Advanced system settings > Environment Variables...) Find...
- Adding to the answer provided here ( https://stackoverflow.com/a/64459399/894565 ). I manually created environment variables via UI for Java11 , Ja...
- If your path have less than 1024 characters can execute (Run as Administrator) this script: @echo off set "JAVA5_FOLDER=C:\Java\jdk1.5.0_22" set "...
- Run this BAT file to conveniently change the java version. Pros: It does NOT modify the PATH system environment variable. The only thing that has t...
- Load below mentioned PowerShell script at the start of the PowerShell. or generate the file using New-Item $profile -Type File -Force this will cr...
Jun 17, 2023 · If you’ve ever worked with multiple Java versions on a single environment, you’re likely familiar with the challenges it can present. In this article, I’ll share my personal experience and some...
Mar 26, 2016 · If there is something different, than you expect, than it is better to reinstall Java. If it not possible, very carefully change the settings. Be aware, that from version to version the setup can be different. In my case I would to downgrade from Java 1.9 to 1.8. Java Registry Setup
We can now easily switch between Java versions very easily from any directory: C:\>java8 "Setting Java 8 as JAVA_HOME as system environment variable (script must be run as administrator)" SUCCESS: Specified value was saved.
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Can I use different versions of Java under Windows?
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This post show how to have multiple Java runtime environments on your PC and switch between them on Windows so that a particular program uses the version that you want it to.
