Print Fibonacci & Reverse series with Thread class

Q. Write a JAVA program which will generate the threads:

- To display 10 terms of Fibonacci series.
- To display 1 to 10 in reverse order.

Answer:

We develop two classes, one for finding Fibonacci series and other is for the reverse number.

Fibonacci.java

import java.io.*;
class Fibonacci extends Thread
{
     public void run()
     {
          try
          {
               int a=0, b=1, c=0;
               BufferedReader br=new BufferedReader(new InputStreamReader(System.in));

               System.out.print("Enter the Limit for fabonacci: ");

               int n = Integer.parseInt(br.readLine());
               System.out.println("\n=================================");
               System.out.println("Fibonacci series:");
               while (n>0)
               {
                    System.out.print(c+" ");
                    a=b;
                    b=c;
                    c=a+b;
                    n=n-1;
               }
          }
          catch (Exception ex)
          {
               ex.printStackTrace();
          }
     }
}


Reverse.java

class Reverse extends Thread
{
     public void run()
     {
          try
          {
               System.out.println("\n=================================");
               System.out.println("\nReverse is: ");
               System.out.println("=================================");
               for (int i=10; i >= 1 ;i-- )
               {
                    System.out.print(i+"  ");
               }
               System.out.println("\n=================================\n\n");
          }
          catch (Exception ex)
          {
               ex.printStackTrace();
          }
     }
}


MainThread.java

class MainThread
{
     public static void main(String[] args)
     {
          try
          {
               Fibonacci fib = new Fibonacci();
               fib.start();
               fib.sleep(4000);
               Reverse rev = new Reverse();
               rev.start();
          }
          catch (Exception ex)
          {
               ex.printStackTrace();
          }
     }
}


Output:

fibonacci reverse
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