exec process

thufir@dur:~$
thufir@dur:~$ java -jar NetBeansProjects/Skype/dist/Skype.jar
Exception in thread "main" java.lang.IllegalThreadStateException: process hasn't exited
	at java.lang.UNIXProcess.exitValue(UNIXProcess.java:217)
	at net.bounceme.dur.skype.Skype.main(Skype.java:14)
thufir@dur:~$
thufir@dur:~$ cat NetBeansProjects/Skype/src/net/bounceme/dur/skype/Skype.java
package net.bounceme.dur.skype;

import java.io.IOException;
import java.util.logging.Level;
import java.util.logging.Logger;

public class Skype {

    private static final Logger log = Logger.getLogger(Skype.class.getName());

    public static void main(String args[]) throws IOException {
        Runtime rt = Runtime.getRuntime();
        Process proc = rt.exec("uname -a");
        int exitVal = proc.exitValue();
        System.out.println("Process exitValue: " + exitVal);
    }
}
thufir@dur:~$