Answer to Question #245966 in Java | JSP | JSF for kishan

Question

Write a program in Java to perform the following operations on Matrix using

multithreading. Get the required input matrix from the user and after that run

three threads to perform the following operation.

a. Addition

b. Subtraction

c. Multiplication

Answer 1

Source code

import java.util.Scanner;
public class Main
{
    
	public static void main(String[] args) {
		Scanner input=new Scanner(System.in);
		System.out.println("Enter number of rows: ");
		int rows=input.nextInt();
		System.out.println("Enter number of columns: ");
		int cols=input.nextInt();
		int [][] matrix1=new int [rows][cols];
		int [][] matrix2=new int [rows][cols];
		System.out.println("Enter first matrix: ");
		for(int i=0;i<rows;i++){
		    for(int j=0;j<cols;j++){
		        matrix1[i][j]=input.nextInt();
		    }
		}
		
		System.out.println("Enter second matrix: ");
		for(int i=0;i<rows;i++){
		    for(int j=0;j<cols;j++){
		        matrix2[i][j]=input.nextInt();
		    }
		}
		//addition
		Matrix thread1=new Matrix();
		thread1.addition(matrix1,matrix2,rows,cols);
		
		//subtraction
		Matrix thread2=new Matrix();
		thread2.subtraction(matrix1,matrix2,rows,cols);
		//multiplication
		Matrix thread3=new Matrix();
		thread3.multiplication(matrix1,matrix2,rows,cols);
		
	}
}
class Matrix extends Thread{
    public void addition(int [][] A, int [][] B, int r, int c){
        int [][] sum=new int[r][c];
        for(int i=0;i<r;i++){
            for(int j=0;j<c;j++){
		        sum[i][j]=A[i][j]+B[i][j];
		    }
		}
		System.out.println("The first matrix + second matrix is: ");
		for(int i=0;i<r;i++){
            for(int j=0;j<c;j++){
                System.out.print(sum[i][j]+" ");
		    }
		    System.out.println();
		}
    }
    public void subtraction(int [][] A, int [][] B, int r, int c){
        int [][] sub=new int[r][c];
        for(int i=0;i<r;i++){
            for(int j=0;j<c;j++){
		        sub[i][j]=A[i][j]-B[i][j];
		    }
		}
		System.out.println("The first matrix - second matrix is: ");
		for(int i=0;i<r;i++){
            for(int j=0;j<c;j++){
                System.out.print(sub[i][j]+" ");
		    }
		    System.out.println();
		}
    }
    public void multiplication(int [][] A, int [][] B, int r, int c){
        int [][] mul=new int[r][c];
        for(int i=0;i<r;i++){    
            for(int j=0;j<c;j++){    
                mul[i][j]=0;      
                for(int k=0;k<r;k++)      
                    {      
                    mul[i][j]+=A[i][k]*B[k][j];      
                    } 
            }   
        }    
		System.out.println("The first matrix * second matrix is: ");
		for(int i=0;i<r;i++){
            for(int j=0;j<c;j++){
                System.out.print(mul[i][j]+" ");
		    }
		    System.out.println();
		}
    }
}

Output