Multiplicacion de Matriz en Paralelo Java

/*  matriz.java */
package matriz;



public class matriz {

    private static  Thread hilo;
    public static int [][] A = new int [][] {{1,2,3},{3,4,5},{3,2,1}};
     public static int [][] B = new int [][]{{2,3,4},{5,5,5},{1,1,1}} ;
    public static int [][] C=new int [3][3];

    public static void main(String[] args)
    {


    hilo=new hilo();
    hilo.start();



    }

}

/*  hilo.java */
package matriz;
public class hilo  extends Thread
{

    public void run()
    {
        operacion();
        imprimir();


    }

    private void imprimir()
    {
        // TODO Auto-generated method stub
        int i ,j,k;
        for(i = 0; i < 3; i++)
        {
            System.out.print("\n");
             for(j = 0; j < 3; j++)
             {
                 System.out.print(matriz.C[i][j]+" ");
              }
         }

    }

    private void operacion()
    {
        // TODO Auto-generated method stub
        int i ,j,k;
           for (i = 0; i < 3; i++) {
            for (j = 0; j < 3; j++) {
           matriz.C[i][j] = 0;
            for (k = 0; k < 3; k++) {
             matriz.C[i][j] += matriz.A[i][k] * matriz.B[k][j];
             }
             }
             }

    }
}