I have been trying to set up my workspace so I can begin modding Minecraft, but everytime I run gradlew setupDecompWorkspace it says:

 

ERROR: JAVA_HOME is set to an invalid directory: C:\Program Files\Java\jdk1.8.0_51\bin

 

I know I need to set the JAVA_HOME variable in my environment variables, so I did. However, it appears to be saying it's set to a place that the variable in the system properties is not set to.  I created a new JAVA_HOME variable and gave it the correct path, "C:\Program Files (x86)\Java\jre1.8.0_71",  but it didn't update it.  At this point, I have uninsatlled and reinstalled both the jdk and jre.  The path JAVA_HOME is pointing to, "C:\Program Files\Java\jdk1.8.0_51\bin",  doesn't even exist anymore.  When I do echo %JAVA_HOME% it tells me the same thing, that the JAVA_HOME exists, but it's not the right directory.  I set everything up correctly in the Environment Variables (according to all the tutorials I read), but I'm not really sure what's wrong at this point.  It could be anything what with the stupid bugs Windows 10 has...

- You need to have the JDK installed, not just the JRE (JDK includes JRE).

- JAVA_HOME needs to point at the JDK folder (e.g. C:\Program Files\Java\jdk1.8.0_51), not the bin folder inside it.

 

I'll change the JAVA_HOME I have to point to the jdk, but it seems like there is another one hidden somewhere since even after setting it to something other than

"C:\Program Files\Java\jdk1.8.0_51\bin", it doesn't update.

 

Here's a picture of my variables:

 

http://s29.postimg.org/f8hvmxa9z/Enviroment_Variables.png[/img]

 

Windows is a bit strange with it's environment variables sometimes. You might need to relog or reboot.

 

Wow, that fixed it.  I can't believe I call myself a programmer and I did everything BUT restart my computer...That's like rule numero uno.

Lol, thanks diesieben07.