Program to create two threads, which alternately displays numbers from 1 to 10. Each thread sleeps for 1 second before displaying next number

This is a simple program which uses sleep(long millisec) method of Thread class. It causes to pause the execution of thread for specified number of milliseconds. The output of the program may vary.
PROGRAM 
class One extends Thread {
 
 public void run() {
  
  for(int i=1; i<=10; i++) {
   System.out.println("One : "+i);
   
   try {
    Thread.sleep(1000);
   }
   catch (InterruptedException ie) { }
  }
 }
}

class Two extends Thread {
 
 public void run() {
  
  for(int i=1; i<=10; i++) {
   System.out.println("Two : "+i);
   
   try {
    Thread.sleep(1000);
   }
   catch (InterruptedException ie) { }
  }
 }
}

public class AlternateTwoThreads {

 public static void main(String[] args) {
  
  One t1 = new One();
  Two t2 = new Two();
  t1.start();
  t2.start();
 }

}
OUTPUT 
C:\javac AlternateTwoThreads.java
C:\java AlternateTwoThreads
One : 1
Two : 1
Two : 2
One : 2
One : 3
Two : 3
One : 4
Two : 4
One : 5
Two : 5
One : 6
Two : 6
One : 7
Two : 7
One : 8
Two : 8
One : 9
Two : 9
One : 10
Two : 10

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