Create a program named MergeSort.java then copy the following code to your program: mergeSort.txt Write a main method that accepts three numbers N, A, B (assume A Assign random numbers between [A, B] to each of the N elements of the array. Call mergeSort method to sort the array. Write instructions to record the time spent on sorting. (Optional) you may write code to verify the array was sorted successfully. Once completed, test your program with different numbers N, A, B and screenshot your result. Your result should include the number of elements and sorting time. mergeSort.txt public static void mergeSort(int[] arr){ mergeSortRec(arr, 0, arr.length-1); } private static void mergeSortRec(int[] arr, int first, int last){ if(first int mid=(first+last)/2; mergeSortRec(arr, first, mid); mergeSortRec(arr, mid+1,last); merge(arr, first, mid, mid+1, last); } } private static void merge(int[] arr, int leftFirst, int leftLast, int rightFirst, int rightLast){ int[] aux=new int[arr.length]; //extra space, this is downside of this algorithm int index=leftFirst; int saveFirst=leftFirst; while(leftFirst<=leftLast && rightFirst <=rightLast){ if(arr[leftFirst]<=arr[rightFirst]){ aux[index++]=arr[leftFirst++]; }else{ aux[index++]=arr[rightFirst++]; } } while(leftFirst<=leftLast){ aux[index++]=arr[leftFirst++]; } while(rightFirst<=rightLast) aux[index++]=arr[rightFirst++]; for(index=saveFirst; index<=rightLast; index++) arr[index]=aux[index]; }

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

Create a program named MergeSort.java then copy the following code to your program:
- mergeSort.txt
Write a main method that accepts three numbers N, A, B (assume A
Assign random numbers between [A, B] to each of the N elements of the array.
Call mergeSort method to sort the array.
Write instructions to record the time spent on sorting.
(Optional) you may write code to verify the array was sorted successfully.
Once completed, test your program with different numbers N, A, B and screenshot your result. Your result should include the number of elements and sorting time.

mergeSort.txt

public static void mergeSort(int[] arr){
   mergeSortRec(arr, 0, arr.length-1);
}
private static void mergeSortRec(int[] arr, int first, int last){
   if(first     int mid=(first+last)/2;
mergeSortRec(arr, first, mid);
    mergeSortRec(arr, mid+1,last);
    merge(arr, first, mid, mid+1, last);
   }
}
private static void merge(int[] arr, int leftFirst,
   int leftLast, int rightFirst, int rightLast){
   int[] aux=new int[arr.length];
   //extra space, this is downside of this algorithm
   int index=leftFirst;
   int saveFirst=leftFirst;
   while(leftFirst<=leftLast && rightFirst <=rightLast){
if(arr[leftFirst]<=arr[rightFirst]){
   aux[index++]=arr[leftFirst++];
    }else{
   aux[index++]=arr[rightFirst++];
    }
   }
   while(leftFirst<=leftLast){
    aux[index++]=arr[leftFirst++];
   }
   while(rightFirst<=rightLast)
    aux[index++]=arr[rightFirst++];
   for(index=saveFirst; index<=rightLast; index++)
    arr[index]=aux[index];
}

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