concurrent-java/src/main/java/interview/FizzBuzz.java at master · Someshbose/concurrent-java · GitHub

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package interview;

public class FizzBuzz {
    public static void main(String[] args) {
        MultiThreadedFizzbuzz obj = new MultiThreadedFizzbuzz(15);

        Thread t1 = new FizzBuzzThread(obj,"Fizz");
        Thread t2 = new FizzBuzzThread(obj,"Buzz");
        Thread t3 = new FizzBuzzThread(obj,"FizzBuzz");
        Thread t4 = new FizzBuzzThread(obj,"Number");

        t1.start();
        t2.start();
        t3.start();
        t4.start();
    }
}

class MultiThreadedFizzbuzz{
    private int n;
    private int num =1;

    public MultiThreadedFizzbuzz(int n){
        this.n = n;
    }

    public synchronized void fizz() throws InterruptedException{
        while (num <= n){
            if(num % 3 == 0 & num %5 !=0 ){
                System.out.println("Fizz!");
                num++;
                notifyAll();
            }else {
                wait();
            }
        }
    }

    public synchronized void buzz() throws InterruptedException{
        while (num <= n){
            if(num % 3 != 0 & num %5 ==0 ){
                System.out.println("Buzz!");
                num++;
                notifyAll();
            }else {
                wait();
            }
        }
    }

    public synchronized void fizzbuzz() throws InterruptedException{
        while (num <= n){
            if(num %15 ==0 ){
                System.out.println("FizzBuzz!");
                num++;
                notifyAll();
            }else {
                wait();
            }
        }
    }

    public synchronized void num() throws InterruptedException{
        while (num <= n){
            if(num %3 !=0 && num %5 !=0 ){
                System.out.println(num);
                num++;
                notifyAll();
            }else {
                wait();
            }
        }
    }
}

class FizzBuzzThread extends Thread{
    MultiThreadedFizzbuzz obj;
    String method;

    public FizzBuzzThread(MultiThreadedFizzbuzz obj, String method){
        this.obj=obj;
        this.method=method;

    }

    @Override
    public void run() {
        if("Fizz".equals(method)){
            try{
                obj.fizz();
            }catch (Exception e){

            }
        }
        else if("Buzz".equals(method)){
            try{
                obj.buzz();
            }catch (Exception e){

            }
        }
        else if("FizzBuzz".equals(method)){
            try{
                obj.fizzbuzz();
            }catch (Exception e){

            }
        }
        else if("Number".equals(method)){
            try{
                obj.num();
            }catch (Exception e){

            }
        }
    }
}