Process Builder

[jackmaverick1]

I get this error,

Exception in thread "main" java.io.IOException: Cannot run program "java -jar C:\Users\Jack\testFile.jar\" (in directory "\"): CreateProcess error=2, The system cannot find the file specified
	at java.lang.ProcessBuilder.start(Unknown Source)
	at testProject.Main.main(Main.java:15)
Caused by: java.io.IOException: CreateProcess error=2, The system cannot find the file specified
	at java.lang.ProcessImpl.create(Native Method)
	at java.lang.ProcessImpl.<init>(Unknown Source)
	at java.lang.ProcessImpl.start(Unknown Source)
	... 2 more

when trying to use this code:

ProcessBuilder pbT = new ProcessBuilder("java -jar "+files[0]);;
		pbT.directory(new File("/"));
		pbT.start();

That's just in my main() method

Does anyone have any insight as to why, and if so how I can fix it?

Thanks!
-Jack

[hiddepolen]

pbT.directory(new File("/"));

Try:

pbT.directory(new File("/text.txt"));

[jackmaverick1]

That's not a directory.
That string, files[0], is a user entered file path

[hiddepolen]

Oh, I see. Well, from the error I can see that you are trying to access a file that doesn't exist. You should catch that exception.

[jackmaverick1]

Thing is, in windows explorer, it finds the file just fine.

[hiddepolen]

What are you trying to do with it? You can get an IOException when you can't open/edit your file. Also, starting with a slash means you take the absolute path.

[jackmaverick1]

The file is a jarfile, and I want to run it. The process builder returns Error=2 now. I really don't know quite what's wrong as the command works perfectly from command prompt.

[hiddepolen]

Does it launch when you type the command straight in the command prompt?
I found this, maybe it helps: http://www.java-forums.org/advanced-java/24858-how-use-process-builder.html

[JamesCherrill]

IOException: Cannot run program "java -jar C:\Users\Jack\testFile.jar\"

That final \ on the filename looks wrong to me. Very wrong.

[jackmaverick1]

Really?
If I used:

if(files[0].endswith("\\")
Somemethodtoremovelastchar();

Do you think I would have better luck?

[jackmaverick1]

Does it launch when you type the command straight in the command prompt?
I found this, maybe it helps: http://www.java-forums.org/advanced-java/24858-how-use-process-builder.html

Yes, perfectly

[hiddepolen]

Well, does the command with \ at the end work in the prompt? Testing helps usually, just try and check if it works :)

EDIT: You just posted before me. I would suggest you try what JamesCherill said.