Executing command line app

Question

I am trying to execute JAD decompiler on class file from code:

Process p = Runtime.getRuntime().exec("c:\\1\\jad.exe c:\\1\\EIn.class");
//All paths are correct, "c:\\1\\jad.exe c:\\1\\EIn.class" wotks when I run it in cmd

When I debug i don't get any errors, debugger moves to the next line...

if I put:

int res = p.waitFor();

It just hangs.

Update:

BufferedReader in = new BufferedReader(new InputStreamReader(p.getErrorStream()));
String str = null;
while ((str = in.readLine()) != null) { //Stucks here
}

See http://stackoverflow.com/questions/12433888/use-java-to-start-a-windows-exe/12433899#12433899 — Sri Harsha Chilakapati, Nov 19 '12 at 13:08
Use the cmd to launch it. The '/k' arg causes to wait in the cmd. — Sri Harsha Chilakapati, Nov 19 '12 at 13:22

score 1 · Answer 1 · answered Nov 19 '12 at 13:04

1

Is the jad decompiler waiting on input from you via stdin?

To see the errors that you are getting, consume the getOutputStream and getErrorStream to see what the decompiler is writing out.

You can use the ProcessBuilder class to make redirecting streams a little more pleasant.

answered Nov 19 '12 at 13:04

Jeff Foster

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with file ProcessBuilder it also gets stuck – markiz Nov 19 '12 at 15:20

score 0 · Answer 2 · answered Nov 19 '12 at 13:07

0

public static void main(String[] args) throws Exception {

    String[] cmd = { "c:\\1\\jad.exe", "-c:\\1\\EIn.class" };
    Process p = Runtime.getRuntime().exec(cmd);
    p.waitFor();
}

answered Nov 19 '12 at 13:07

Morteza Adi

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score 0 · Answer 3 · answered Nov 19 '12 at 13:10

0

This is a TRAP in Java ,please just have a look at this page,you will get more than you wanna!

answered Nov 19 '12 at 13:10

Kevin

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Executing command line app

3 Answers3