Question

Complete a multithreaded application that solves a problem of your choice, e.g., Sudoku solution validator (Chapter 4, Project 1), multithreaded sorting application (Chapter 4, Project 2), matrix multiplication, factorial solver, etc. While I recommend using C, you may use Java or any other language if you choose. Turn in both your source code and a readme explaining what problem your program solves and how to use it.

Answer 1

import java.lang.*;
import java.io.*;
class multiplication extends Thread
{
static int m1[][];
static int m2[][];
static int out[][];
static int n=2;
int row;
multiplication(int i)
{
row=i;
this.start();
}
public void run()
{
int i,j;
for(i=0;i<n;i++)
{
out[row][i]=0;
for(j=0;j<n;j++)
out[row][i]=out[row][i]+m1[row][j]*m2[j][i];
}
}
public static void main(String args[])
{
int i,j;
BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
System.out.print("Enter the order of Matrix : ");
try
{
n=Integer.parseInt(br.readLine());
}catch(Exception e){}
m1=new int[n][n];
m2=new int[n][n];
out=new int[n][n];
System.out.println("Enter the First Matrix : ");
for(i=0;i<n;i++)
{
for(j=0;j<n;j++)
{
try
{
m1[i][j]=Integer.parseInt(br.readLine());
}catch(Exception e){}
}
}
System.out.println("Enter the Second Matrix : ");
for(i=0;i<n;i++)
{
for(j=0;j<n;j++)
{
try
{
m2[i][j]=Integer.parseInt(br.readLine());
}catch(Exception e){}
}
}
multiplication mat[]=new multiplication[n];
for(i=0;i<n;i++)
mat[i]=new multiplication(i);
try
{
for(i=0;i<n;i++)
mat[i].join();
}catch(Exception e){}
System.out.println("OUTPUT :");
for(i=0;i<n;i++)
for(j=0;j<n;j++)
System.out.println(out[i][j]);
}
}