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

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Question

use java

**Part 2**

f. Create a new StringBuilder object using a no-argument constructor.

g. Using a for loop, append the array elements one by one to the StringBuilder (one per loop iteration).

h. Record the run-time it took to append all integers to the StringBuilder (record the 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.

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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.");


    }
}

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