Question

A3 15. 2D Array Operations Write a program that creates a two-dimensional array initialized with test data. Use any primitive data type that you wish. The program should have 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 all the values in the array. • getRowTotal. This method should accept a two-dimensional array as its first argu- ment and an integer as its second argument. The second argument should be the sub- script 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 argu- ment and an integer as its second argument. The second argument should be the sub- script of a column in the array. The method should return the total of the values in the specified column. getHighest InRow. This method should accept a two-dimensional array as its first argument and an integer as its second argument. The second argument should be the subscript of a row in the array. The method should return the highest value in the specified row of the array. getLowest InRow. This method should accept a two-dimensional array as its first argu- ment and an integer as its second argument. The second argument should be the sub- script of a row in the array. The method should return the lowest value in the specified row of the array. Demonstrate each of the methods in this program.

This is java, please follow my request and use netbeans. Thank you.

Answer 1

1.CODE->

public class Test {

   public static void main(String[] args) {
       int [][]arr = new int[3][3];
      
       System.out.println("Array is: ");
      
   int x = 1;
   for (int i = 0; i < 3; i++)
   {
   for (int j = 0; j < 3; j++)
   {
   arr[i][j] = x++;
   System.out.print(arr[i][j]+" ");
   }
   System.out.println();
   }
  
   System.out.println();
  
  
   System.out.println("total sum of array : "+getTotal(arr));
   System.out.println("average of array : "+getAverage(arr));
  
   int i=2;
   System.out.println("sum of : "+ i+"th row in the array : "+getRowTotal(arr,i));
   System.out.println("sum of : "+ i+"th column in the array : "+getColumnTotal(arr,i));
  
   int m=1;
   System.out.println("Maximum in the "+m+"th row : "+getHighestInRow(arr,m));
   System.out.println("Minimum in the "+m+"th row : "+getLowestInRow(arr,m));

   }
  
   public static int getTotal(int[][] arr)
   {
       int sum=0;
       for(int i=0;i<arr.length;i++)
       {
           for(int j=0;j<arr[i].length;j++)
           {
               sum+=arr[i][j];
           }
       }
      
       return sum;
   }
  
   public static double getAverage(int[][] arr)
   {
       int m=arr.length;
       int n=arr[0].length;
       double ans=(1.0 * getTotal(arr))/(m*n);
       return ans;
   }
  
   public static int getRowTotal(int[][] arr,int i)
   {
       int sum=0;
       if(i>=arr.length)
           return sum;
      
      
       for(int j=0;j<arr[i].length;j++)
           sum+=arr[i][j];
       return sum;
          
   }
  
   public static int getColumnTotal(int[][] arr,int j)
   {
       int sum=0;
       if(j>=arr[j].length)
           return sum;
      
      
       for(int i=0;i<arr.length;i++)
           sum+=arr[i][j];
       return sum;
          
   }
  
   public static int getHighestInRow(int[][] arr,int i)
   {
       int max=arr[i][0];
       for(int j=0;j<arr[i].length;j++)
       {
           if(arr[i][j]>max)
               max=arr[i][j];
       }
      
       return max;
      
   }
  
  
   public static int getLowestInRow(int[][] arr,int i)
   {
       int min=arr[i][0];
       for(int j=0;j<arr[i].length;j++)
       {
           if(arr[i][j]<min)
               min=arr[i][j];
       }
      
       return min;
      
   }
  

}

2.OUTPUT->

| 3 | BE R = = = = = = = & Console X Task List <terminated Test [Java Application] C:\Program Files Vava\jdk-12.0.1\bin\javaw.exe (25-Feb-2020, 1:55:36 am) Array is: 1 2 3 4 5 6 7 8 9 total sum of array : 45 average of array : 5.0 sum of : 2th row in the array : 24 sum of : 2th column in the array : 18 Maximum in the 1th row : 6 Minimum in the 1th row : 4

I DID THIS IN ECLIPSE BECAUSE I DONT HAVE NET BEANS RIGHT NOW BUT I THINK IT WILL HELP YOU IN GETTING THE LOGIC. I WILL BE GLAD IF IT HELPS YOU.