Example of output: Sum by rows: 45 Sum by columns: 45 Sum reversed diagonal elem

Question

Example of output:

Sum by rows: 45

Sum by columns: 45

Sum reversed diagonal elements: 15

/**********************************Problem2.java **************************************************/

public class Problem2 {
int[][] myArray;
//Constructor: Initialize myArray with the given
//vallues provided from the given square above.
public Problem2() {


}

//sum All Elements by rows: Write your code below
public int sumAllElementsbyRows() {

}

//Sum Reversed Diagonal Elements: Write your code below
public int sumAllReversedDiag() {

}

//sum All Elements by columns: Write your code below
public int sumAllElementsbyColumns() {

}

public static void main(String[] args){
Problem2 myProblem2 = new Problem2();
System.out.println("Sum by rows: " + myProblem2.sumAllElementsbyRows ());
System.out.println("Sum by columns: " + myProblem2.sumAllElementsbyColumns());
System.out.println("Sum reversed diagonal elements: " + myProblem2.sumAllReversedDiag());
}
}

2. For this problem you need S problem you need to write 3 methods that take integer typed two-dimensional array and return the following quantities: (20 points) -Sum of all elements in the array by row -Sum of all elements in the array by column -Sum of reversed diagonal elements You also need to write a constructor to initialize myArray with the given values in the table below. You can assume that array has equal number of columns and rows (i.e. squared). Example: For the two-dimensional array: 1 | 2 | 3 | ABS The reversed diagonal elements are {3, 5, 7}.

Explanation / Answer

/**** I have provided the complete program . First i have created the 2D array which you have given in the constructor. Then Provided all three methods ****/

package learning;

public class Problem2 {
    int[][] myArray;
    //Constructor: Initialize myArray with the given
    //vallues provided from the given square above.
    public Problem2() {
    myArray = new int[3][3];
    int num = 1;
    for(int i=0; i<3;i++){
      for(int j =0; j<3;j++){
       myArray[i][j] = num++;
      }
    }
   
    }
   
    //sum All Elements by rows: Write your code below
    public int sumAllElementsbyRows() {
    int sum = 0;
    for(int i=0; i<3;i++){
      for(int j=0; j<3; j++){
       sum += myArray[i][j];
      }
    }
    return sum;
    }
   
    //Sum Reversed Diagonal Elements: Write your code below
    public int sumAllReversedDiag() {
    int sum =0;
    for(int i=2; i>=0; i--){
      for(int j=2; j>=0; j--){
       if(i==j){
        sum += myArray[i][j];
       }
      }
    }
    return sum;
    }
   
    //sum All Elements by columns: Write your code below
    public int sumAllElementsbyColumns() {
    int sum =0;
    for(int j=0; j<3;j++){
      for(int i=0; i<3; i++){
       sum += myArray[i][j];
      }
    }
    return sum;
    }
   
    public static void main(String[] args){
       Problem2 myProblem2 = new Problem2();
       System.out.println("Sum by rows: " + myProblem2.sumAllElementsbyRows ());
       System.out.println("Sum by columns: " + myProblem2.sumAllElementsbyColumns());
       System.out.println("Sum reversed diagonal elements: " + myProblem2.sumAllReversedDiag());
       }
   }

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