Question

DO THIS IN JAVA

Write a complete Java program. the program has two threads. One thread prints all capital letters 'A' to'Z'. The other thread prints all odd numbers from 1 to 21.

Answer 1

/*
* The java program that create two instances of Thread classes and calls start methods to print the capital letters from A to Z and odd numbers from
* 1 to 21.
* */
//ThreadMain.java
public class ThreadMain
{
   public static void main(String[] args)
   {
       System.out.println("Printing capital letters and odd numbers using two threads");
       /*Create an instance of Thread classes*/
       Thread thread1=new Thread(new CapitalLetters());
       Thread thread2=new Thread(new OddNumbers());
       //call start methods on thread1 and thread2
       thread1.start();
       thread2.start();
   }
   //inner static class to print capital letters A to Z
   static class CapitalLetters implements Runnable
   {
       public synchronized void run()
       {
           /*synchronized run method to print the capital letters
           * from A to Z*/
           for(char ch='A';ch<='Z';ch++)
           {
               System.out.println(ch);
           }              
       }
   }
   //inner static class to print odd numbers from 1 to 21
   static class OddNumbers implements Runnable
   {
       /*synchronized run method to print the odd numbers
       * from 1 to 21*/
       public synchronized void run()
       {
           for(int i=1;i<=21;i++)
           {  
               if(i%2==1)
                   System.out.println(i);
           }
       }
   } //end of inner class ,OddNumbers
}//end of the class

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Sample Output:

Printing capital letters and odd numbers using two threads
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
U
V
W
X
Y
Z
1
3
5
7
9
11
13
15
17
19
21