How to open/run .jar file (double-click not working)?

Question

I can\'t open or run my .jar file.

I just installed java, but I tried to open the .jar with other programs first, so the double-click defaults to something else and

Answer 1

There are two different types of Java to download: The JDK, which is used to write Java programs, and the RE (runtime environment), which is used to actually run Java programs. Are you sure that you installed the RE instead of the SDK?