ArrayExamples.java

import java.util.Scanner;

public class ArrayExamples {
  public static void main(String[] args) {
    Scanner input = new Scanner(System.in);
    final int N = 2;
    final int M = 2;
    final int P = 3;
    
    additionExample(N, M, input);
		printDivider();
    subtractionExample(N, M, input);
		printDivider();
    multiplicationExample(N, M, input);
		printDivider();
    divisionExample(N, M, input);
  }

	public static void printDivider(){
		System.out.println("-------------------------------------------------------------------------------");
	}
	public static void additionExample(int n, int m, Scanner input){
    System.out.println("Addition Example");
		// Enter matrix1
    System.out.println("Enter matrix1: it is 2x2 ");
    double[][] matrix1 = populateMatrix(n, m, input);

    // Enter matrix2
    System.out.println("Enter matrix2: it is 2x2");
    double[][] matrix2 = populateMatrix(n, m, input);
    
    // Add two matrices and print the result
    double[][] sumMatrix = addMatrix(matrix1, matrix2);

    System.out.println("The addition of the matrices is ");
    printMatrix(sumMatrix);
	}

	public static void subtractionExample(int n, int m, Scanner input){
		System.out.println("Subtraction Example");
		// Enter matrix1
    System.out.println("Enter matrix1: it is 2x2 ");
    double[][] matrix1 = populateMatrix(n, m, input);

    // Enter matrix2
    System.out.println("Enter matrix2: it is 2x2");
    double[][] matrix2 = populateMatrix(n, m, input);
    
    // Add two matrices and print the result
    double[][] subtractionMatrix = subtractMatrix(matrix1, matrix2);

    System.out.println("The subtraction of the matrices is ");
    printMatrix(subtractionMatrix);
	}
	
	public static void multiplicationExample(int n, int m, Scanner input){
		System.out.println("Multiplication Example");
		// Enter matrix1
    System.out.println("Enter matrix1: it is 2x2 ");
    double[][] matrix1 = populateMatrix(n, m, input);

    // Enter matrix2
    System.out.println("Enter matrix2: it is 2x2");
    double[][] matrix2 = populateMatrix(n, m, input);
    
    // Add two matrices and print the result
    double[][] subtractionMatrix = multiplyMatrices(matrix1, matrix2);

    System.out.println("The multiplication of the matrices is ");
    printMatrix(subtractionMatrix);
	}

	public static void divisionExample(int n, int m, Scanner input){
		System.out.println("Division Example");
		// Enter matrix1
    System.out.println("Enter matrix1: it is 2x2 ");
    double[][] matrix1 = populateMatrix(n, m, input);

    // Enter matrix2
    System.out.println("Enter matrix2: it is 2x2");
    double[][] matrix2 = populateMatrix(n, m, input);
    
    // Add two matrices and print the result
    double[][] result = divideMatricies(matrix1, matrix2);

    System.out.println("The multiplication of the matrices is ");
    printMatrix(result);
	}



  public static double[][] populateMatrix(int n, int m, Scanner input){
    double[][] matrix = new double[n][m];
    for (int i = 0; i < matrix.length; i++) {
      for (int j = 0; j < matrix[i].length; j++) {
        matrix[i][j] = input.nextDouble();
      }
    }
    return matrix;
  }

  public static void printMatrix(double[][] matrix){
    String row;
    for (int i = 0; i < matrix.length; i++) {
			row = "";
      for (int j = 0; j < matrix[i].length; j++) {
				row += " " + matrix[i][j];
      }
      System.out.println(row);
    }
  }

  /**
  * The method for adding two matrices
  */
  public static double[][] addMatrix(double[][] m1, double[][] m2) {
    double[][] result = new double[m1.length][m1[0].length];
    for (int i = 0; i < result.length; i++) {
      for (int j = 0; j < result[i].length; j++) {
        result[i][j] = m1[i][j] + m2[i][j];
      }
    }
    return result;
  }
  
	/**
  * The method for subtracting one matrix from another
  */
  public static double[][] subtractMatrix(double[][] m1, double[][] m2) {
    double[][] result = new double[m1.length][m1[0].length];
    for (int i = 0; i < result.length; i++) {
      for (int j = 0; j < result[i].length; j++) {
        result[i][j] = m1[i][j] - m2[i][j];
      }
    }
    return result;
  }
	
	/**
  * The method for multiplying one matrix from another
  */
  public static double[][] multiplyMatrices(double[][] m1, double[][] m2) {
    double[][] result = new double[m1.length][m1[0].length];
    for (int i = 0; i < result.length; i++) {
      for (int j = 0; j < result[i].length; j++) {
        result[i][j] = m1[i][j] * m2[i][j];
      }
    }
    return result;
  }
	
	/**
  * The method for dividing one matrix from another
  */
  public static double[][] divideMatricies(double[][] m1, double[][] m2) {
    double[][] result = new double[m1.length][m1[0].length];
    for (int i = 0; i < result.length; i++) {
      for (int j = 0; j < result[i].length; j++) {
        result[i][j] = m1[i][j] / m2[i][j];
      }
    }
    return result;
  }
}