Need help creating multithreaded program

[invalid6363]

i'm trying to do one of the exercises from my OS book. the exercise is about creating a multithreaded solution that performs matrix multiplication.(A[i,j] x B[i,j]= C[i,j])
it says that for this exercise you need to calculate each element C[i,j] in a separate worker thread. This will involve creating MxN worker threads.(this is the part that i don't quite understand how to do.)
here is my code:

public class WorkerThread implements Runnable

{
	private int m;

	private int n;

	private int k = 2;

	private int [][] A;

	private int [][] B;

	private int [][] C;

	public WorkerThread(int m, int n, int[][] A, int[][]B, int [][]C) {

		this.m = m;
		this.n = n;

		this.A = A;
		this.B = B;
		this.C = C;

	}

	public void run() {

		/* calculate the matrix product in C[row][col] */
		for(int i = 0;i < m;i++){
			for(int j = 0;j < n;j++){
				for(int h = 0;h < k;h++){
					C[i][j] += A[i][h] * B[h][j];
				}				
			}
		}
		System.out.println("Matrix C: ");

		for(int i = 0;i < m;i++){
			for(int j = 0;j < n;j++){
				System.out.print(" " + C[i][j]);
			}
			System.out.println();
		}
	}
	public static void main(String [] args){
		int m = 3;
		int n = 3;
		int A [][] = {{1,4},{2,5},{3,6}};
		int B [][] = {{8,7,6},{5,4,3}};
		int C [][] = new int [m][n];		
		WorkerThread worker1 = new WorkerThread(m, n, A, B, C);
		Thread thread1 = new Thread(worker1);
		thread1.start();
	}
}

this code works but it only uses a single thread to multiply the matrices and from what i understand i need to use more than one thread.
Does anybody have any suggestions or can explain the "create MxN threads" part?
thanks.

 

[Diancecht]

You're rigth, you're creating just a thread.

I'd create another class that implements Runnable and have this code

               for(int h = 0;h < k;h++){
                    C[i][j] += A[i][h] * B[h][j];

in its run method, creating a new thread on each invocations inside the loop.

Cheers,
Dian