Receiving 3 data from arduino to processing

Dear All,

I am new to JAVA and processing. Can you tell me that how can I receive three serial data from arduino uno.

I am sending three parameters from arduino as.

Serial.print(i);
Serial.print(",");
Serial.print(D1);
Serial.print("_");
Serial.print(D2);
Serial.print(".");  // termination.

But I do not know how to receive the three different data. Yet I am sucessful to receive TWO of them.

Please help me Sir/ Madam