Question

Programming in java

In this part of this Lab exercise, you will need to create a new class named ArrayShiftMult. This class carries out simple manipulation of an array. Then you should add a main method to this class to check that your code does what it is supposed to do. 1. Create a BlueJ project named LAB06 as follows: a. Open the P drive and create a folder named Blue), if it does not exist already. Under this folder, create another subfolder named CSC203 for this course, if it does not exist already. I strongly recommend that you keep your computer work for this course properly organized in this folder. b. Launch BlueJ and create a BlueJ project named LAB06 under the CSC203 folder mentioned in the previous step. 2. Create a class named ArrayshiftMult. Open the editor and delete all the code placed in it automatically by BlueJ. Choose Options and Preferences and then check Display Line Numbers. a. write a method named shiftOne which should accept an array of type int and retrun an array of type int. If we pass the argument inArray (an int array of non-negative ints) to shiftone, it should return a new array with the following properties: • The length of the returned array is the same as the given array (inArray); • The first element value of the returned array is -1. All but the last element of the given array appear in the returned array and the elements of the given array are shifted one to the right in returned array. For example, If the passed array for the shiftOne is of the form: {4, 21, 55, 2, 7} Then the returned array will be of the form: {-1, 4, 21, 55, 2}. b. Write a method named mult(int[] arrayı, int[] array2) which should accept 2 arrays of type int and return an array of type int. The method should be defined so that array1 and array2 can be of different lengths. Let minLen be the length of the shortest array (or of both arrays if they are the same size). and let longArray be whichever is the longest of the two. Then the following properties hold of the output array, outArray; • The length of outArray is the length of LongArray • For all i < minten, QutArrax[i] = array1[i] * array2[i]. • For all j >= minten QutArrax[j] = LangArrax[j]. c. Add the main() method to the class which will test the functionality of your work. The main method should allow the following: Define two arrays with the following form. {4, 7, 21, 3, 4, 5, 18, 4, 6, 2} {13, 10, 1, 3, 6, 9} Invoke the Shiftone method given the second array as a parameter list. then print out the elements of the resulted array using the for loop. Invoke the mult method given the two arrays, then print out the elements of the resulted array using the for loop.

Answer 1

JAVA program:

 class ArrayShiftMult {  // Method for shiftOne  public static int[] shiftOne(int[] inArray)     {               int len_array;          len_array = inArray.length;             int flag = 0;           int[] result = new int[len_array];                              // Checking for negetive integers               for(int i = 0; i < len_array; i++)           {                       if(inArray[i] < 0)                   {                               flag = 1;                               break;                  }               }                               // Shift for non negetive integers              if(flag == 0)           {                       result[0] = -1;                         for(int i = 1; i < len_array; i++)                   {                               result[i] = inArray[i-1];                       }               }               return result;                  }               // Method for mult      public static int[] mult(int[] array1, int[] array2)    {               int len1 = array1.length;               int len2 = array2.length;               int minLen;             int[] longArray;                                // Finding the minLen of the arrays and set the longArray               if(len1 <= len2)             {                       minLen = len1;                  longArray = array2;             }               else            {                       minLen = len2;                  longArray = array1;             }                               // Define outArray with length of longArray             int[] outArray = new int[longArray.length];             for(int i = 0; i < minLen; i++)              {                       outArray[i] = array1[i] * array2[i];            }               for(int j = minLen; j < longArray.length; j++)               {                       outArray[j] = longArray[j];             }                               return outArray;        }                       // Main method to initialize array and call the methods         public static void main(String args[])  {               int[] arr1 = {4, 7, 21, 3, 4, 5, 18, 4, 6, 2};          int[] arr2 = {13, 10, 1, 3, 6, 9};                              System.out.println("\nArray1: ");               for(int i = 0; i < arr1.length; i++)                 {                       System.out.print(arr1[i]+" ");          }                               System.out.println("\n\nArray2: ");             for(int i = 0; i < arr2.length; i++)                 {                       System.out.print(arr2[i]+" ");          }                               System.out.println("\n\nInvoking shiftOne method using second array:");                 int[] shift_arr = shiftOne(arr2);                               for(int i = 0; i < shift_arr.length; i++)            {                       System.out.print(shift_arr[i]+" ");             }                               System.out.println("\n\nInvoking mult method using the two arrays:");           int[] mult_arr = mult(arr1, arr2);                              for(int i = 0; i < mult_arr.length; i++)             {                       System.out.print(mult_arr[i]+" ");              }                               System.out.println("");                 }        } 

The output of the above code:

Array1: may using the for loop. 4 7 21 3 4 5 18 4 6 2 Array2: 13 10 1 3 6 9 Invoking shiftOne method using second array: -1 13 10 1 3 6 Invoking mult method using the two arrays: 52 70 21 9 24 45 18 4 6 2

Thank you !!!