suspend.java

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class CustomThread extends Thread 
{
    volatile boolean goFlag = true;
    
    CustomThread(String name) 
    {
        super(name);
        start(); 
    }

    public void run() 
    {
        try {
            for(int loop_index = 0; loop_index <= 5; loop_index++) {
                System.out.println(Thread.currentThread().getName() + " here...");
                Thread.sleep(500);
                synchronized(this) {
                    while(!goFlag) {
                        wait();
                    }
                }
            }
        } catch (InterruptedException e) {}
    }

    public void newSuspend() 
    {
        goFlag = false;
    }

    synchronized public void newResume() 
    {
        goFlag = true;
        notify();
    }
}

class suspend 
{
    public static void main(String args[]) 
    {
        CustomThread thread1 = new CustomThread("one");
        CustomThread thread2 = new CustomThread("two");

        try {
            Thread.sleep(1000);
            System.out.println("Suspending thread one...");
            thread1.newSuspend();
            Thread.sleep(1000);
            System.out.println("Resuming thread one...");
            thread1.newResume();
        } catch (InterruptedException e) {}

        try {
            thread1.join();
            thread2.join();
        } catch (InterruptedException e) {}
    }
}