Let's say you want to try other Java versions but you don't want to alter the Windows environment variables. Steps: Go to your home folder. i.e. C:\Users\MyAccountName To install Java on your Windows system: 1. Double-click the downloaded Java file to start the installation. 2. Once the installation wizard welcome screen appears, select Next to proceed. 3. Choose the destination folder for the Java installation files, or stick to the default path and click Next. 4. In that case, follow our guide on Java JDK/Java JRE installation on Windows 11 to install Java on your system. Once you configure it correctly on the system, follow the below-mentioned steps to install and configure the NetBeans IDE on your system. Step 1: Download NetBeans on Your System Remove any existing java path entries. Suppose I need to change java version to 8, then i change the key value of JAVA_HOME. i.e, JAVA_HOME renamed to JAVA_HOME_11 and JAVA_HOME_8 renames to JAVA_HOME You need to close existing CMD and open new CMD to verify this change. I admit its still a GUI solution only Download and extract the Windows x86 tar.gz version and start your .JAR file from commmand line: start C:\Java\bin\javaw.exe -jar C:\myfolder\myprogram.jar. 2 is not ok because it implies to install (now or in the past) Java on the 'another PC'. But 1 works. When I install JDK 11 (and later) and then install JRE 8, and run the java -version command, 1.8.0 is displayed in the output instead of 11 (or the installed JDK version). A: This happens because the javapath is placed before JDK 11 (and later) location in the user environment path. This is a bug with the JRE 8 uninstaller. Step 1 : Right Click on MyComputer and click on properties . Step 2 : Click on Advanced tab. Step 3: Click on Environment Variables. Step 4: Create a new class path for JAVA_HOME. Step 5: Enter the Variable name as JAVA_HOME and the value to your jdk bin path ie c:\Programfiles\Java\jdk-1.6\bin and. 7. OpenJDK 64-Bit Server VM 18.9 (build 11.0.2+9, mixed mode) Using the sdk use command will only enable you to use a specified version of the JDK in the same terminal shell where you are Prx6Yc.