Themes are synchronized

I am creating two threads, a first thread for calling the application and a second thread for the read file that results from calling the application on the first thread. Calling the application works fine, but reading the file doesn't work.

Here is my code:

/*
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 * and open the template in the editor.
 */
package reciverwindow;

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

/**
 *
 * 
 */
public class NewClass1 implements Runnable {

    public static void main(String[] args) {

        CallMatlab c = new CallMatlab();
        CUI m = new CUI();
        Thread t1 = new Thread(c);
         t1.start();
        Thread t2 = new Thread(m);

        t2.start();
       /* try {
            t2.sleep(3);
        } catch (InterruptedException ex) {
            Logger.getLogger(NewClass1.class.getName()).log(Level.SEVERE, null, ex);
        }
    }*/


   synchronized (t2) {
            try {
                t2.wait(3);
                  t2.notifyAll();
            } catch (InterruptedException ex) {
                Logger.getLogger(NewClass1.class.getName()).log(Level.SEVERE, null, ex);
            }
            }


    }

    public void run() {
        throw new UnsupportedOperationException("Not supported yet.");
    }
}