Java Program to Increment the Matrix Elements by One

Java Program to Increment the Matrix Elements by One

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In the previous article, we have seen Java Program to Print an Identity Matrix

In this article we are going to see how we can write a program to increment each element of the matrix by 1 in JAVA language.

Java Program to Increment the Matrix Elements by One

A 3*3 Matrix is having 3 rows and 3 columns where this 3*3 represents the dimension of the matrix. Means there are 3*3 i.e. total 9 elements in a 3*3 Matrix.

Let’s understand it in more simpler way.

                   | A00   A01   A02 |
Matrix A =  | A10   A11   A12 |
                   | A20   A21   A22 | 3*3
  • Matrix A represents a 3*3 matrix.
  • ‘A‘ represents the matrix element
  • ‘Aij‘ represents the matrix element at it’s matrix position/index.
  • ‘i‘ represents the row index
  • ‘j‘ represents the column index
  • Means A00=Aij  where i=0 and j=0,  A01=aij where i=0 and j=1 and like this.
  • Here we have started row value from 0 and column value from 0.

Let’s see different ways to Increment the Matrix Elements by One.

Method-1: Java Program to Increment the Matrix Elements by One By Static Initialization of Array Elements

Approach:

  • Declare and Initialize an array of 3*3 means main matrix is ready.
  • Declare another resultant array of 3*3 means resultant matrix.
  • Now take two for loops and iterate each element of the main matrix and increment each element by one.
  • Go on storing each incremented element to the resultant matrix.
  • Print the resultant matrix.

Program:

public class Matrix
{
    public static void main(String args[])
    {

        // Initializing the 3X3 matrix i.e. 2D array
        int arr[][] = {{19,25,32},{40,54,62},{70,20,60}};
        //Resultant matrix
        int resArr[][] = new int[3][3];
        int row, col ;

        System.out.print("The matrix is : ");
        printMatrix(arr);

        // Loops to increment each element of matrix by 1 
        for(row=0;row<3;row++)
        {
            for(col=0;col<3;col++)
            {
                resArr[row][col] = arr[row][col]+1;
            }   
        }
        
        System.out.print("\nThe matrix after incrementing by 1 is : ");
        printMatrix(resArr);
    }

    // Method to print the matrix
    static void printMatrix(int arr[][])
    {
        int row, col;
        // Loop to print the elements
        for(row=0;row<3;row++)
        {
            // Used for formatting
            System.out.print("\n");
            for(col=0;col<3;col++)
            {
                System.out.print(arr[row][col]+" ");
            }
        }
        System.out.print("\n");
    }
}
Output:

The matrix is : 
19 25 32 
40 54 62 
70 20 60

The matrix after incrementing by 1 is : 
20 26 33 
41 55 63 
71 21 61

Method-2: Java Program to Increment the Matrix Elements by One By Dynamic Initialization of Array Elements

Approach:

  • Declare an array of 3*3.
  • Take the input of array elements from the user, so now main matrix is ready.
  • Declare another resultant array of 3*3 means resultant matrix.
  • Now take two for loops and iterate each element of the main matrix and increment each element by one.
  • Go on storing each incremented element to the resultant matrix.
  • Print the resultant matrix.

Program:

import java.util.*;

public class Matrix
{
    public static void main(String args[])
    {

        //Scanner class to take input
        Scanner scan = new Scanner(System.in);
        // Initializing the 3X3 matrix i.e. 2D array
        int arr[][] = new int[3][3];
         //Resultant matrix
        int resArr[][] = new int[3][3];
        int row, col ;
        
        // Taking main matrix input
        System.out.println("Enter matrix elements : ");
        for(row=0;row<3;row++)
            for(col=0;col<3;col++)
                arr[row][col] = scan.nextInt();
      

        System.out.print("The matrix is : ");
        printMatrix(arr);

        // Loops to increment each element of matrix by 1 
        for(row=0;row<3;row++)
        {
            for(col=0;col<3;col++)
            {
                resArr[row][col] = arr[row][col]+1;
            }   
        }
        
        System.out.print("\nThe matrix after incrementing by 1 is : ");
        printMatrix(resArr);
    }

    // Method to print the matrix
    static void printMatrix(int arr[][])
    {
        int row, col;
        // Loop to print the elements
        for(row=0;row<3;row++)
        {
            // Used for formatting
            System.out.print("\n");
            for(col=0;col<3;col++)
            {
                System.out.print(arr[row][col]+" ");
            }
        }
        System.out.print("\n");
    }
}
Output:

Enter matrix elements : 21 41 61 51 71 11 91 81 31
The matrix is : 
21 41 61 
51 71 11 
91 81 31

The matrix after incrementing by 1 is : 
22 42 62 
52 72 12 
92 82 32

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