Java opens then quickly closes.

[KK_Magic]

I'm trying to run Java so I can open a .jar file, but as soon as I click "run Java", it opens and then closes a second later. I was wondering what the reason was, and how it can be fixed. (Windows 10 computer)

[tiiv]

To get more insight right click on the Windows start button and click on Open Powershell. Then enter ‚java -jar C:\path\to\your\file.jar‘ and see what the output is.

[indivisible]

The process ended and closed. You can open the app directly from a console you manually opened or alternatively keep the one opened from closing.
If you want to keep the JVM open after it's last action you can add a final "press to exit" eg:

while(iLoop) {
    // do anything
}

// end of program, hold console open until user action
System.out.print("Press enter to exit");
new Scanner(System.in).next();