How to put a running thread in waiting state using jdk1.5 and above

Question

Hi,
i have thread class(MyThread.java) which will run Continuously and i written two methods to stop thread and resume thread. but it is not happening as i expected , even though stop thread method called the thread is running
how to stop this thread .
Belwo you can find the code :
Mythread.java
package com.appli.test.thread;
public class MyThread implements Runnable
     public boolean bo = false;
     private Thread thread = null;
     private Object runLock = new Object();
     int count =0;
     public void begin()
          thread = new Thread(this);
          thread.start();
     public void run()
          while(bo == false)
               System.out.println("while bo ="+bo);
               try
                    System.out.println(" count = ** "+count);
                    count +=1;
                    Thread.sleep(1000);
               }catch (Exception e) {
                    // TODO: handle exception
     public void stopThred()
               synchronized(runLock){
                    try {
                         bo = true;
                         System.out.println("wait called ");
                         runLock.wait();
                    } catch (InterruptedException e) {
                         e.printStackTrace();
                    }catch(IllegalMonitorStateException ie){
                         ie.printStackTrace();
     public void resumeThread()
          synchronized(runLock){
               try {
               bo = false;
                    runLock.notify();
                    System.out.println("resume called");
               }catch(IllegalMonitorStateException ie){
                    ie.printStackTrace();
from this class i am calling MyThread class
package com.appli.test.thread;
public class CallThread {
     * @param args
     public static void main(String[] args) {
          System.out.println("in the call thread class **");
          MyThread thread = new MyThread();
          thread.begin();
from this class i am calling stop thread method
package com.appli.test.thread;
public class CallOne {
     public static void main(String[] args) {
          System.out.println("in the call one class **");
          MyThread thread = new MyThread();
          thread.stopThred();               
from this class i am calling resume
package com.appli.test.thread;
public class CallTwo {
     public static void main(String[] args) {
          System.out.println("in the call Two class **");
          MyThread thread = new MyThread();
          thread.resumeThread();
what went worng in this code?
please help me

Answer 1

@Op. Your classes CallThread, CallOne and CallTwo aren't sharing an instance. CallThread starts a thread. CallOne creates a MyThread instance, and calls stopThread on that one. That is not the same instance as the thread created by CallThread. The same applies to CallTwo.
Kaj