Sending and receiving with MPI.COMM_WORLD.Send and MPI.COMM_WORLD.Recv

This is an example for Sending and Receiving Program in MPJExpress. Overview about  sending and receiving with MPI will be added later 🙂

package MPJExpress;
import mpi.MPI;
/**
*
* @author pbasari
*/
public class SendReceive {
      public static void main (String args[]) {
          MPI.Init(args);
          int rank = MPI.COMM_WORLD.Rank();
          int size = MPI.COMM_WORLD.Size();
        // sending
        if (rank == 0) {
        int data [] = {1, 2, 3, 4};
               for (int i = 1; i < size; i++) {
                      System.out.println(“From 0 Send to ” +i);
                      MPI.COMM_WORLD.Send(data, 0, data.length, MPI.INT, i, 0);
              }
       }
       else { // receiving
             int data [] = new int[4];
             System.out.println(“Received From 0 “);
             MPI.COMM_WORLD.Recv(data, 0, data.length, MPI.INT, 0, 0);
             for (int i = 0; i < data.length; i++)
                    System.out.println(“Rank:” + rank + “; ” + data[i]);
             }
       MPI.Finalize();
}
}