problem with exec(), subprocess starts after main process

[krsnik02.abel@gmail.com]

Hi all,

I have a problem. I must create a subprocess and connect to it with socket.

My process:
0. String command_to_exec_subprocess="java -cp"+cp+" mypackage.MyMainClass "+args;
1. Runtime.getRuntime().exec(command_to_exec_subproce ss);
2. socket.connect(new InetSocketAddress("localhost",25000), 3000);

My subprocess:
1. ServerSocket server=new ServerSocket(25000);
JFrame jf=new JFrame();
jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
jf.setVisible(true);
2. Socket client=server.accept();

I use: Windows 7
JVM: 1.6

Problem is that frame popsup after my process finished, socket can never connect to server socket. As far as I know this means that Runtime waits with starting subprocess till my main process ends... Does any one know how to make the process execute just after I use exec command?? I tryed to use ProcessBuilder but when I use it it doesnt even start the subprocess... When i run the command from cmd on windows7 it runs with no problem.

Thx.

[krsnik02.abel@gmail.com]

I found solution here:
When Runtime.exec() won't - JavaWorld

To try the connection I used:
new Thread(){
private BufferedReader is=new BufferedReader(new InputStreamReader(p.getInputStream()));
public void run(){
try {
String msg="";
while((msg=is.readLine())!=null){
System.out.println("STD IN:"+msg);
}
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}.start();

new Thread(){
private BufferedReader is=new BufferedReader(new InputStreamReader(p.getErrorStream()));
public void run(){
try {
String msg="";
while((msg=is.readLine())!=null){
System.out.println("STD ERR:"+msg);
}
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}.start();

its not very elegant but good for now to try if solution works.