Write the statements required to create and initialize the 2D array: Write the s

Question

Write the statements required to create and initialize the 2D array: Write the statements required to swap the top-right element with the bottom-left element of the 2D array above. You may hard-code the indexes here. Write a method that takes a 2D array of integers as an argument The array returns a new 2D array of integers of the same size (same number of rows and columns). The values in the returned array are the same as those in the argument array EXCEPT that any negative values are made positive. The header for the method is given below: public static int [][] absoluteArray2D(int [][] in) {

Explanation / Answer

TwoDimensionalArray.java

public class TwoDimensionalArray {

   public static void main(String[] args) {
      
       //Creating an integer type 2_D array and initialized with values
       int arr[][]={{1,5,7,9},{2,4,6,8}};
      
       //Displaying the elements inside the 2-D array
       System.out.println("Displaying 2-Dimensional Array ::");
       for(int i=0;i<arr.length;i++)
       {
           for(int j=0;j<arr[0].length;j++)
           {
               //Displaying the elements
               System.out.print(arr[i][j]+" ");
           }
           System.out.println(" ");
       }

      
       int temp;
       //Performing Swapping operation
       temp=arr[0][3];
       arr[0][3]=arr[1][0];
       arr[1][0]=temp;
      
       //Displaying the elements inside the 2-D array
       System.out.println("Displaying 2-Dimensional Array After Swapping::");
       for(int i=0;i<arr.length;i++)
       {
           for(int j=0;j<arr[0].length;j++)
           {
               //Displaying the elements
               System.out.print(arr[i][j]+" ");
           }
           System.out.println(" ");
       }

      
   }

}

_____________________

Output:

Displaying 2-Diemensional Array ::
1 5 7 9
2 4 6 8
Displaying 2-Diemensional Array After Swapping::
1 5 7 2
9 4 6 8

_______________________

25)

TwoDArrayAbsolute.java

import java.util.Scanner;

public class TwoDArrayAbsolute {

   public static void main(String[] args) {
      
       //Creating an integer array
   int arr[][]=new int[4][4];
     
   //Scanner class object is sued to read the inputs entered by the user
   Scanner sc=new Scanner(System.in);
     
     
   /* This nested for loop will get the values entered
   * by the suer and populate them into an array
   */
   for(int i=0;i<4;i++)
   {
       for(int j=0;j<4;j++)
       {
           //Getting the values entered by the user
           System.out.print("Enter the element ["+i+","+j+"] :");
           arr[i][j]=sc.nextInt();
       }
   }
     
   //Displaying the elements inside the array
   System.out.println("Displaying the elements inside the array :");
   for(int i=0;i<4;i++)
   {
       for(int j=0;j<4;j++)
       {
       System.out.printf(" %d ",arr[i][j]);
       }
       System.out.println(" ");
   }

   //Calling the method by passing the array as argument
   arr=absoluteArray2D(arr);
     
   //Displaying the 2-d array after making all integers as positive
   System.out.println("Displaying the elements inside the array :");
   for(int i=0;i<4;i++)
   {
       for(int j=0;j<4;j++)
       {
       System.out.print(arr[i][j]+" ");
       }
       System.out.println(" ");
   }
   }

   private static int[][] absoluteArray2D(int[][] arr) {
         
       for(int i=0;i<4;i++)
       {
           for(int j=0;j<4;j++)
           {
       if(arr[i][j]<0)
           arr[i][j]=-(arr[i][j]);
           }
      
       }
       return arr;
   }

}

__________________________

output:

Enter the element [0,0] :-2
Enter the element [0,1] :3
Enter the element [0,2] :4
Enter the element [0,3] :-5
Enter the element [1,0] :-6
Enter the element [1,1] :-7
Enter the element [1,2] :5
Enter the element [1,3] :4
Enter the element [2,0] :-3
Enter the element [2,1] :-5
Enter the element [2,2] :-6
Enter the element [2,3] :-7
Enter the element [3,0] :6
Enter the element [3,1] :5
Enter the element [3,2] :4
Enter the element [3,3] :-3
Displaying the elements inside the array :
-2   3   4   -5     
-6   -7   5   4     
-3   -5   -6   -7     
6   5   4   -3     
Displaying the elements inside the array :
2   3   4   5     
6   7   5   4     
3   5   6   7     
6   5   4   3     

__________Thank You

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