Cleaned up implementation of getDREFs in the Java client.

- Removed unnecessary loop to try to read several times.
 - Fixed the way that readUDP detects the length of received packets.

Java/src/XPlaneConnect.java

@@ -175,12 +175,12 @@ public class XPlaneConnect implements AutoCloseable
      */
     private byte[] readUDP() throws IOException
     {
-        byte[] buffer = new byte[2048];
+        byte[] buffer = new byte[65536];
         DatagramPacket packet = new DatagramPacket(buffer, buffer.length);
         try
         {
             socket.receive(packet);
-            return Arrays.copyOf(buffer, buffer[4]);
+            return Arrays.copyOf(buffer, packet.getLength());
         }
         catch (SocketTimeoutException ex)
         {
@@ -293,20 +293,14 @@ public class XPlaneConnect implements AutoCloseable
         sendUDP(os.toByteArray());
 
         //Read response
-        for(int i = 0; i < 40; ++i)
-        {
         byte[] data = readUDP();
         if(data.length == 0)
         {
-                continue;
+            throw new IOException("No response received.");
         }
         if(data.length < 6)
         {
-                throw new Error("Response too short"); //TODO: Make custom error type
+            throw new IOException("Response too short");
-            }
-            if(data[5] != drefs.length)
-            {
-                throw new Error("Unexpected response length"); //TODO: Make custom error type
         }
         float[][] result = new float[drefs.length][];
         ByteBuffer bb = ByteBuffer.wrap(data);
@@ -323,8 +317,6 @@ public class XPlaneConnect implements AutoCloseable
         }
         return result;
     }
-        throw new IOException("No response received.");
-    }
 
     public void sendDREF(String dref, float value) throws IOException
     {