Please screen of the execution of the program in addition to the source code.

For the following code

import java.math.BigInteger;

import java.util.Scanner;

class SumThread extends Thread {

public SumThread (BigInteger from, BigInteger to) {

this.from = from;

this.to = to;

sum = new BigInteger("0");

}

public void run( ) {

for(BigInteger i = from; i.compareTo(to) <= 0; i = i.add(new BigInteger("1"))) {

sum = sum.add(i);

}

}

public BigInteger getSum( ) {

return sum;

}

private BigInteger from, to, sum;

}

public class Sum4 {

public static void main(String args[]) {

/*if(args.length != 3) {

System.out.println("Pass threads, start and end.");

return;

}*/

Scanner s=new Scanner(System.in);

System.out.print("Enter The Number Of Threads: ");

/* get arguments */

int num_threads = s.nextInt();

System.out.print("Enter The Starting Number : ");

BigInteger from = new BigInteger(String.valueOf(s.nextInt()));

System.out.print("Enter The Ending Number : ");

BigInteger to = new BigInteger(String.valueOf(s.nextInt()));

/* an array of threads */

SumThread [] threads = new SumThread [num_threads];

/* fill in the start/end ranges for each */

BigInteger step = to.subtract(from).divide(BigInteger.valueOf(num_threads));

long startTime = System.currentTimeMillis();

for(int i = 0; i < num_threads; i++) {

BigInteger start = from.add(step.multiply(BigInteger.valueOf(i)));

BigInteger stop = start.add(step).subtract(BigInteger.valueOf(1));

/* make sure we go all the way to the end on last thread */

if(i == (num_threads - 1)) {

stop = to;

}

System.out.printf("Thread %s sums from %s to %s. ", i, start.toString( ), stop.toString( ));

threads[i] = new SumThread (start, stop);

}

/* start them all */

for(int i = 0; i < num_threads; i++) {

threads[i].start( );

}

/* wait for all the threads to finish! */

try {

for(int i = 0; i < num_threads; i++) {

threads[i].join( );

}

} catch(InterruptedException e) {

System.out.println("Interrupted");

}

/* calculate total sum */

BigInteger total_sum = new BigInteger("0");

for(int i = 0; i < num_threads; i++) {

total_sum = total_sum.add(threads[i].getSum( ));

}

long stopTime = System.currentTimeMillis();

long elapsedTime = stopTime - startTime;

System.out.printf("The sum of %s-%s is %s in total time %d msec. ", from.toString( ), to.toString( ), total_sum.toString( ),elapsedTime);

}

}