Question

Hi I have a class that is a remote object and I implemented methods.
Then I just wanted to test it in my local. So I added a main method on it.
Then in main, I called runtUtilApp method , that just executes notepad, after some sleep I finish the working of notepad and I called stop method. After the all execution I wait program to finish execution. But it is still working and not ending.

What is the reason of this ?
I am thinking wrong ?

---

import java.io.IOException;
import java.rmi.RemoteException;
import java.rmi.server.*;



public class ClientImp extends UnicastRemoteObject implements Remote{

    private static final long serialVersionUID = 227L;
    private Process proc;

/**
 * constructor
 */
public ClientImp() throws RemoteException {
    super();
}


public boolean runApp() throws RemoteException {
    try {
        Runtime rt = Runtime.getRuntime();
        proc = rt.exec("notepad");
        return true;
    } catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
        return false;
    }
}


public boolean stopCurrentUtilApp() throws RemoteException {
    proc.destroy();
    return true;
}

public static void main(String[] args) {
     client;
    try {
        ClientImp client = new ClientImp();
        client.runUtilApp();
        Thread.sleep(10000);
        client.stopCurrentUtilApp();
    } catch (RemoteException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    } catch (InterruptedException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
}

}

Answer 1

Because your class extends UnicastRemoteObject, which means that when you create a new instance of your class, the UnicastRemoteObject constructor is called, which exports this object as an RMI server object, which cause a non-daemon RMI thread to start.

Call System.exit() to exit from the JVM.