package com.company;

import java.util.concurrent.ForkJoinPool;
import java.util.concurrent.TimeUnit;

public class Main {
    public static final class randomCharThread implements Runnable{
        @Override
        public void run(){
            char achar = (char) ('A' + Math.random() * ('Z' - 'A' + 1));
            System.out.print(achar);
        }
    }
    public static final class randomDigitThread implements Runnable{
        @Override
        public void run(){
            int aDigit = (int) (Math.random() * 10);
            System.out.print(aDigit);
        }
    }
    public static final class starThread implements Runnable{
        @Override
        public void run(){
            System.out.print('*');
        }
    }
    public static void main(String[] args){
        int noOfTimes = 30;
        System.out.println("Program starts");
        final ForkJoinPool pool = ForkJoinPool.commonPool();
        for(int i=0; i<noOfTimes; i++){
            pool.execute(new randomCharThread());
            pool.execute(new randomDigitThread());
            pool.execute(new starThread());
        }
        pool.awaitQuiescence(5000, TimeUnit.MILLISECONDS);
        System.out.println("");
        System.out.println("Program ends");
    }
}