Matrix

import java.util.Random;

public class Matrix {
  //Creating the matrix
  static int[][] mat = new int[3][3];
  static int[][] mat2 = new int[3][3];
  static int[][] result = new int[3][3];

  public static void main(String [] args){

    //Object _random class
    Random rand = new Random();


    //Filling first mtrx
    for (int i = 0; i < mat.length; i++) {
      for (int j = 0; j < mat[i].length; j++) {
        mat[i][j]=rand.nextInt(10);
      }
    }

    //Filling second mtrx
    for (int i = 0; i < mat2.length; i++) {
      for (int j = 0; j < mat2[i].length; j++) {
        mat2[i][j]=rand.nextInt(10);
      }
    }

    try{
      //Object of multiply Class
      Multiply multiply = new Multiply(3,3);

      //Threads
      MatrixMultiplier thread1 = new MatrixMultiplier(multiply);
      MatrixMultiplier thread2 = new MatrixMultiplier(multiply);
      MatrixMultiplier thread3 = new MatrixMultiplier(multiply);

      //Implementing threads
      Thread th1 = new Thread(thread1);
      Thread th2 = new Thread(thread2);
      Thread th3 = new Thread(thread3);

      //Starting threads
      th1.start();
      th2.start();
      th3.start();

      th1.join();
      th2.join();
      th3.join();

    }catch (Exception e) {
      e.printStackTrace();
    }


    System.out.println("\n\nResult:");
    for (int i = 0; i < result.length; i++) {
      for (int j = 0; j < result[i].length; j++) {
        System.out.print(result[i][j]+" ");
      }
      System.out.println();
    }
  }

}

//Multiply Class
class Multiply extends Matrix {

  private int i;
  private int j;
  private int chance;

  public Multiply(int i, int j){
    this.i=i;
    this.j=j;
    chance=0;
  }

  //Multiplication
  public synchronized void multiplyMatrix(){

    int sum=0;
    int a=0;
    for(a=0;a<i;a++){
      sum=0;
      for(int b=0;b<j;b++){
        sum=sum+mat[chance][b]*mat2[b][a];
      }
      result[chance][a]=sum;
    }

    if(chance>=i)
    return;
    chance++;
  }
}

class MatrixMultiplier implements Runnable {

  private final Multiply mul;

  public MatrixMultiplier(Multiply mul){
    this.mul=mul;
  }

  @Override
  public void run() {
    mul.multiplyMatrix();
  }
}
}