Question

Java Programming (use jGrasp if not thats fine)

Write a Two classes one class that creates a two-dimensional 2 rows by 3 columns double array. This class will have a separate method for the user to populate the array with data values. The other class that has the following methods:

•   getTotal. This method should accept a two-dimensional array as its argument and return the total of all the values in the array.
•   getAverage. This method should accept a two-dimensional array as its argument and return the average of the values in the array.
•   getRowTotal. This method should accept a two-dimensional array as its first argument and an integer as the second argument. The second argument should be the subscript of a row in the array. The method should return the total of the values in the specified row.
•   getColumnTotal. This method should accept a two-dimensional array as its first argument and an integer as the second argument. The second argument should be the subscript of a column in the array. The method should return the total of the values in the specified column.
• getHighestInRow. This method should accept a two-dimensional array as its first argument and an integer as the second argument. The second argument should be the subscript of a row in the array. The method should return the value in the specified row.
• getLowestInRow. This method should accept a two-dimensional array as its first argument and an integer as the second argument. The second argument should be the subscript of a row in the array. The method should return the lowest value in the specified row.

Answer 1

Java Programming :

import java.util.Scanner;
class methods_class{
   //method to calculate sum of the array
   double getTotal(double A[][]){
       double sum = 0;
       int i,j=0;
       for(i=0;i<2;i++){
           for(j=0;j<3;j++){
               sum = sum + A[i][j];
           }
       }
       return sum;
   }
   //method to calculate average of the array
   double getAverage(double A[][]){
       double sum = getTotal(A);
       double average = sum/6.0;
       return average;
   }
   //method to calculate sum of the specific row of the array
   double getRowTotal(double A[][],int row){
       double row_sum = 0;
       int j;
       for(j=0;j<3;j++){
           row_sum = row_sum + A[row][j];
       }
       return row_sum;
   }
   //method to calculate sum of the specific column of the array
   double getColumnTotal(double A[][],int column){
       double column_sum = 0;
       int i;
       for(i=0;i<2;i++){
           column_sum = column_sum + A[i][column];
       }
       return column_sum;
   }
   //method to calculate max of the specific row of the array
   double getHighestInRow(double A[][],int row){
       double max = A[row][0];
       int j=0;
       for(j=0;j<3;j++){
           if(max < A[row][j]){
               max = A[row][j];
           }
       }
       return max;
   }
   //method to calculate min of the specific row of the array
   double getLowestInRow(double A[][],int row){
       double min = A[row][0];
       int j=0;
       for(j=0;j<3;j++){
           if(min > A[row][j]){
               min = A[row][j];
           }
       }
       return min;
   }
}
public class array{
   static double[][] A = new double[2][3];
   //method to take data to array
   public void populate(){
       int i,j=0;
       Scanner sc = new Scanner(System.in);
       for(i=0;i<2;i++){
           for(j=0;j<3;j++){
               System.out.print("Enter A["+i+"]["+j+"] : ");
               A[i][j] = sc.nextDouble();
           }  
       }
       System.out.println();
   }
   public static void main(String args[]){
       array data = new array();
       Scanner sc = new Scanner(System.in);
       int i,j=0;
       //calling the method to take data into the array
       data.populate();
       System.out.print("Entered 2D Array : \n\n\t");
       for(i=0;i<2;i++){
           for(j=0;j<3;j++){
               System.out.print(A[i][j] + " ");  
           }
           System.out.print("\n\t");
       }
       System.out.println();
      
      
       methods_class methods = new methods_class();
       //calling the method to calculate the sum of the array
       System.out.println("Total sum of the array : "+ methods.getTotal(A));  
       System.out.println("Total average of the array : "+ methods.getAverage(A));
      
       //calling the method to calculate the average of the array
       System.out.print("Enter a row_number to get the row_sum : ");
       int row = sc.nextInt();
       System.out.println("Total " + row +"row sum of the array : "+ methods.getRowTotal(A,row));
      
       //calling the method to calculate sum of the specific row of the array
       System.out.print("Enter a column_number to get the column_sum : ");
       int column = sc.nextInt();
       System.out.println("Total " + column +"column sum of the array : "+ methods.getColumnTotal(A,column));
      
       //calling the method to calculate max of the specific row of the array
       System.out.print("Enter a row_number to get max in that row: ");
       int row1 = sc.nextInt();
       System.out.println("Max in " + row1 +"row of the array : "+ methods.getHighestInRow(A,row1));
      
       //calling the method to calculate min of the specific row of the array
       System.out.print("Enter a row_number to get min in that row: ");
       int row2 = sc.nextInt();
       System.out.println("Min in " + row2 +"row of the array : "+ methods.getLowestInRow(A,row2));
      
   }
}

Output :

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