package com.company;

import java.util.concurrent.atomic.AtomicInteger;
import java.awt.Toolkit;

public class Main
{

    public static int n = 100000;
    public static final AtomicInteger val = new AtomicInteger(n);
    public static ThreadsDecrement[] threadsArr = new ThreadsDecrement[4];

        public static class ThreadsDecrement extends Thread
        {
            int counter = 0;
            public void run()
            {
                long start = System.currentTimeMillis();

                while(Main.val.get() > 0)
                {
                    val.getAndDecrement();
                    counter++;
                }

                long end = System.currentTimeMillis();

                Toolkit.getDefaultToolkit().beep();

                System.out.println(this.getName() + " performed " + Integer.toString(counter) + " operations. " +
                        "It took " + Double.toString(((double)(end-start)/1000L))+ " seconds.\n" +
                        "remaining value = " + Integer.toString(Main.val.get()));
            }

        }

        public static void main(String args[])
        {
            for(int i = 0; i < 4; i++)
            {
                Main.threadsArr[i] = new ThreadsDecrement();
                Main.threadsArr[i].setName("Thread " + Integer.toString(i));
                Main.threadsArr[i].start();
            }
        }
    }