Print ODD numbers using ODD Thread and Print EVEN Numbers using Even Thread

Hi,
       we need to print the odd elements using the odd thread and print the even elements using the even thread:

Here i am placing the java code and output. please post a comment if you see any mistake here.

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package com.learning; public class PrintODDandEvenNumbersUsingThreads { public volatile static int counter = 0; public static void main(String[] args){ PrintODDandEvenNumbersUsingThreads obj = new PrintODDandEvenNumbersUsingThreads(); Thread evenThread = new EvenThreadClass(obj); Thread oddThread = new OddThreadClass(obj); evenThread.start(); oddThread.start(); } static class EvenThreadClass extends Thread{ PrintODDandEvenNumbersUsingThreads obj = null; EvenThreadClass(PrintODDandEvenNumbersUsingThreads obj){ this.obj=obj; } public void run(){ while(!Thread.currentThread().isInterrupted()){ synchronized(obj){ try{ if(counter%2==0){ System.out.println("EvenThread-->"+counter); counter++; Thread.sleep(100); obj.notify(); }else{ obj.wait(); } }catch(InterruptedException ie){ ie.printStackTrace(); }catch(Exception e){ e.printStackTrace(); } } } } } static class OddThreadClass extends Thread{ PrintODDandEvenNumbersUsingThreads obj = null; OddThreadClass(PrintODDandEvenNumbersUsingThreads obj){ this.obj=obj; } public void run(){ while(!Thread.currentThread().isInterrupted()){ synchronized(obj){ try{ if(counter%2!=0){ System.out.println("OddThread<-- span="">+counter); counter++; Thread.sleep(100); obj.notify(); }else{ obj.wait(); } }catch(InterruptedException ie){ ie.printStackTrace(); }catch(Exception e){ e.printStackTrace(); } } } } } }

O/P:
EvenThread-->0
OddThread<--1 p="">EvenThread-->2
OddThread<--3 p="">EvenThread-->4
OddThread<--5 p="">EvenThread-->6
OddThread<--7 p="">EvenThread-->8
OddThread<--9 p="">EvenThread-->10
OddThread<--11 p="">