“no main manifest attribute” after downloading a .jar file in Java
问题 I'm am very confused with this problem. It didn't happen for the first few times when ran this code, but after that, I couldn't get it running again. It only breaks after downloading it using my Java code. The code I have downloads a jar file from my website and then uses ProcessBuilder to run it. It all worked fine the first couple of times, but I ran it a few more times and it started giving me no main manifest attribute, in ...\AppData\Local\GDRQ\bin\launch_gdbotbin.jar Here is the java