Problem using sockets, etc.

Alrighty, well I'm building a very basic chat server using the tutorial from IBM, and when I got to compile it, I get the following (DOS capture):

Server.java:51: warning: [unchecked] unchecked call to put(K,V) as a member of t

he raw type java.util.Hashtable

outputStreams.put(s, dout);

^

.\ServerThread.java:27: cannot find symbol

symbol : class DataIntputStream

location: class ServerThread

DataInputStream din = new DataIntputStream(socket.getInputStream());

^

1 error

1 warning

Not sure what the first one means, and I'm none too sure how to correct the second one. Suggestions?

[665 byte] By [Java_the_Hutta] at [2007-11-26 15:30:09]