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.))

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.");


    }
}

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