Zero Exception – Java, Spring Boot & System Design Tutorials

Write a Java program which will generate threads to display 10 terms of Fibonacci Series and to display 1 to 20 in Reverse order.

Program:

import java.lang.*;

class FibonacciReverse extends Thread{
    String str;
    FibonacciReverse(String s){
        str = s;
        setName(str);
        start();
    }

    public void run() {
        int a=1,b=1,i,j;
        int c=a+b;
        try {
            for(i=0;i<=10;i++) {
                a=b;
                b=c;
                c=a+b;
                System.out.println(c);
                sleep(500);
            }
        } catch(InterruptedException e) {
            System.out.println(e);
        }

        try {
            for(j=20;j>=1;j--) {
                System.out.println(j);
                sleep(500);
            }
        } catch (InterruptedException e){
            System.out.println(e);
        }
    }
}

class ThreadMain {
    public static void main(String args[]){
        FibonacciReverse t1 = new FibonacciReverse("first");
        FibonacciReverse t2 = new FibonacciReverse("second");
    }
}