3 Threads Printing numbers in sequence

Question

I am trying to write a simple code to print numbers in sequence. Scenario is like

Thread  Number
T1        1
T2        2
T3        3
T1        4
T2        5
T3          


        

Answer 1

public class EvenOdd1 {
    //public static String str ="str1";

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        EvenOdd1 edd1 = new EvenOdd1();

        AbThread tr2 = new AbThread(0,edd1);
        AbThread tr3 = new AbThread(1,edd1);
        AbThread tr4 = new AbThread(2,edd1);
        tr2.start();
        tr3.start();
        tr4.start();
    }
}
class AbThread extends Thread {

        int mod;
        int mod_count=1;
        EvenOdd1 edd1;
        public static int count=1;
        int num_thread=3;

        public AbThread(int mod,EvenOdd1 edd1){
            this.mod = mod;
            this.edd1 = edd1;

        }

    public void run()
    {
        synchronized(edd1)
        {
            try{
            while(true){
                while(count%num_thread!=mod)
                    edd1.wait();

                if(count==30)
                    break;

                    print();
                  edd1.wait();
            }
            }
            catch (InterruptedException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }

    }


    public void print()
    {
        int val = mod==1?2*mod_count:(mod==2?3*mod_count:4*mod_count);
        System.out.println(Thread.currentThread().getName() + " : " + val);
        edd1.notifyAll();
        count=count+1;
        this.mod_count++ ;

    }


}