Register an uninstaller with Windows. As of Java 11, the Oracle's free version of Java (Oracle OpenJDK) doesn't seem to include an installer. More on stackoverflow.com

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In image 3 you have multiple paths still pointing to JDK 11... windows is picking the first java.exe it comes across (which is in the JDK11 folders) You need to remove the Eclipse Adoptium and Microsoft\jdk-11.0.12.7-hotspot environment variables Ensure the same thing hasn't happened in the user specific PATH variable - you only showed us the system PATH variable ALSO (important) remove the Common Files\Oracle\Java\javapath environment variable. Oracle does some crappy workaround to try and point you to the "latest" of their JDKs by installing shortcuts in that folder - get rid of it, you don't need those as it only adds to the confusion and causes issues similar to the above. Restart after this and try again - if it's still not working then post updated screenshots Basically you should ONLY be pointing to 1 folder with java.exe if you want "java -version" to run that specific version on the command line You can also technically run: C:\Program Files\Java\jdk-20\bin\java.exe -version and this will output the desired version number. But if you want to be able to run just "java -version" then you have to do the above steps. As others have noted Java isn't really "installed" - it's just about telling programs where the exe is. Most IDEs like IntelliJ will let you specify the path without relying on the environment variables or they may also come with a built-in Java version, it really depends on how you want things to be configured. More on reddit.com

How did you install it? Where did you download it from? What platform are you on? Can't ask for help without providing any information whatsoever. More on reddit.com