Using Datagrams - X And Y Coordinates / Send Back And Forth In One String

Ok, so I am relatively new to datagrams etc. I have three projects set up right now: Client, Client2, and Server, which all interact with each other to send coordinates of player1 and player2 back and forth (X, Y, this is in 2D space not 3D). I have everything set up perfectly except for one problem: I can only send the X coordinate back and forth for each player. I am getting the weirdest error, a parsing error. The way I communicate is I have everything sent back and forth in one string. Then I use the .split() function to turn that string into an array that contains the x and y coordinates. I've done several tests and to no avail. Here's my code:

Server:

Java Code:

package theGame;
import java.io.IOException;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.InetAddress;
import java.net.SocketException;
import javax.swing.JOptionPane;
public class Main {
static String p1X;
static String p1Y;

[Code] ....

Lines 177 on Client1 and 172 on client2 are where the debugger is saying that I parsed wrong.

Also, if your are going to test this you will need to have the LWJGL libraries in your build path.