java -version If it shows the version you wanted, congratulations. If not, check your Path — sometimes Windows caches the old java.exe in C:\Windows\System32 . | Problem | Why it happens | Fix | |---------|----------------|-----| | java -version doesn’t change | Another Java in Path appears before %JAVA_HOME%\bin | Move %JAVA_HOME%\bin to the top of your Path | | “JAVA_HOME is set to an invalid directory” | Typo or missing JDK folder | Double-check the path exists | | java works, but javac doesn’t | You installed a JRE, not a JDK | Download the full JDK | 🚀 Next-Level: Automate with CLI Tools For true wizards, install sdkman (via Git Bash/WSL) or jEnv to switch versions with a single command:
Here’s the treasure map to master Java version switching on Windows. Open cmd and type: change java version windows
Imagine you’re working on a cutting-edge Spring Boot 3 project (needs Java 17), but suddenly you have to debug a legacy banking app from 2014 (needs Java 8). Your PC feels like a time machine—if you know how to switch versions without breaking everything. java -version If it shows the version you
