use java Part 2.f. Create a new StringBuilder Object using no-arg constructor.g. Using for loop append the array elements one by one to the StringBuilder (one per loop iteration)h. Record a run-time it took to append all integers to the StringBuilder (record run-time of 2.g.))

Answered: Part 2. f. Create a new StringBuilder…

Computer Networking: A Top-Down Approach (7th Edition)

7th Edition

ISBN:9780133594140

Author:James Kurose, Keith Ross

Publisher:James Kurose, Keith Ross

Chapter1: Computer Networks And The Internet

Section: Chapter Questions

Problem R1RQ: What is the difference between a host and an end system? List several different types of end...

See similar textbooks

Related questions

Question

use java

Part 2.
f. Create a new StringBuilder Object using no-arg constructor.
g. Using for loop append the array elements one by one to the StringBuilder (one per loop iteration)
h. Record a run-time it took to append all integers to the StringBuilder (record run-time of 2.g.))

Expert Solution

Step 1

Create a java file - Performance.java and copy the code to the file. You have to run the program 3 times. Change the SIZE to 500 and then to 5000 and copy the time taken from the output and create the table.

=============================================================

public class Performance {

    public static void main(String[] args) {

        // change the SIZE to 500, 5000 to repeat for big array size
        final int SIZE = 50;
        System.out.println("Array Size: "+ SIZE);
        //a
        int[] array = new int[SIZE];

        //b
        for (int i = 0; i < SIZE; i++) array[i] = i;

        //c
        String stringObject = new String();

        // d record time
        long startTime = System.currentTimeMillis();
        for (int i = 0; i < SIZE; i++) stringObject += array[i];
        long endTime = System.currentTimeMillis();
        //e
        System.out.println("Time to append using string object: " + (endTime - startTime) + " ms.");



        //f
        StringBuilder builder = new StringBuilder();
        startTime = System.currentTimeMillis();
        for (int i = 0; i < SIZE; i++) builder.append(array[i]);
        endTime = System.currentTimeMillis();
        //e
        System.out.println("Time to append using string builder object: " + (endTime - startTime) + " ms.");


    }
}

================================================================