Cannot open jar files

[TheSpudWhacker]

I have java and have tried with command prompt and double-clicking the program and making it open with the javaw exe but it just makes the notions as if it loaded it but nothing will popup on screen or anything. Nothing will work, at all. I want to install minecraft forge but the .jar won't open, rather frustrating.

 

[itmoba]

Launch cmd.exe and type in "java -jar path_to_my_file.jar". You may need to use the "cd" command to navigate yourself to the folder in which the file resides (assuming you don't know how to type in the path correctly).