class clicker implements Runnable{
	int click=0;
	Thread t;
	private volatile boolean running=true;
	public clicker(int p){
		t=new Thread(this);
		t.setPriority(p);
	}
	public void run(){
		while(running){
			click++;
		}
	}
	public void stop(){
		running=false;
	}
	public void start(){
		t.start();
	}
}

class HiLoPri{
	public static void main(String args[]){
		Thread.currentThread().setPriority(Thread.MAX_PRIORITY);
		clicker hi=new clicker(Thread.NORM_PRIORITY+2);
		clicker lo=new clicker(Thread.NORM_PRIORITY-2);
		lo.start();
		hi.start();
		try{
			Thread.sleep(10000);
		}
		catch(InterruptedException e){
			System.out.println("Main thread Interrupted.");
		}
		lo.stop();
		hi.stop();
		try{
			lo.t.join();
			hi.t.join();
		}
		catch(InterruptedException e){
			System.out.println("InterruptedException caught.");
		}
		System.out.println("Low-priority thread:"+lo.click);
		System.out.println("High-priority thread:"+hi.click);
	}
}