I have managed to open it but it wasn't through the command. I opened the SSBS.jar file and then opened the Super Smash BS.jar file after and for some reason when I pressed start game it opened. So I closed the SSBS.jar tab that opened and tried to play but it semi worked. The levels now load but they crash after being open for about 10 seconds. I couldn't figure out how to do the command line as it kept saying unable to access java file so I must have went wrong somewhere. I'm going to see if I can figure anything else out. Thanks for trying to help me fix it though.
Edit: Before when I was testing and it crashed my volume was turned down, I was trying things out now and found out that when it crashes the music still plays in the background.
Edit Edit: I just going to assume that this is happening due to my laptop. I have got two java error codes but don't understand them. Also before it crashes all the text on screen disappears. This also happens if I go into the options menu to change the button layout as well.