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PrintStream ps; String alias; sClientThread(Socket s, sClientGroup p) { /* called by parent */ theSock = s; parent = p; } The run( ) Method So far, we haven t done too much. Just make sure you understand what each of the global variables will be used […]

public void finalize() { try { ps.close(); dis.close(); theSock.close(); } catch(Exception e); theSock = null; } public void setAlias(String str) { alias = str; } public String getAlias() { return alias; } } Input all of this, and compile. It should compile just […]

while( true ) { try{ sleep(30000); } catch (Exception e); cleanHouse(); } } We re almost done! Only one more class to write. Remember, though, that you cannot compile sClientGroup yet, because it imports sClientThread, which hasn t been written yet! To get around this obstacle, let s write […]

Black Art of Java Game Programming by Joel Fan Sams, Macmillan Computer Publishing ISBN: 1571690433 Pub Date: 11/01/96 Previous Table of Contents Next Automatic Garbage Collection (Reclaiming Unused Memory) Next we need to talk a little about garbage collection. This is a term you may have heard used […]

A brief mention of the StringBuffer class is important here. StringBuffers are like Strings, except they are designed to have things added and removed. Whenever you change a String, it is temporarily changed into a StringBuffer, operated on, and then returned to a String. The Java compiler takes care of all this […]

if(cmd.equals(”logout”)) { sendMessage(T.getAlias()+” has left the room.”, cmd); T.stop(); return ; } /* someone wants to “say” something to the whole room */ if(cmd.equals(”say”)) { sendMessage(T.getAlias()+” says: “+ val, cmd); return ; } /* someone wants to whisper something to a specific person only […]

Explicit Casting When we access an element in theGroup, you may notice that sClientThread in parentheses immediately precedes it. This is called explicit typecasting and is used to convert Objects of different classes. If you ve programmed in C, you ve probably used this to do such things as convert integers […]

Black Art of Java Game Programming by Joel Fan Sams, Macmillan Computer Publishing ISBN: 1571690433 Pub Date: 11/01/96 Previous Table of Contents Next The sendMessage( ) Methods Next, let s write the two methods that will allow us to send messages to different clients. Both have the same […]

That should be enough to get started with the code. Here s the start of sClientGroup.java, which we won t be able to compile until we write sClientThread: import java.net.*; import java.io.*; import java.util.*; import java.lang.*; import sClientThread; public class sClientGroup extends Thread { Vector theGroup; […]

while(servSock != null ) { Socket tempSock; try { tempSock = servSock.accept(); System.out.println(”Received New Connection.”); group.addClient( tempSock ); } catch (Exception e) { System.out.println(”New Connection Failure. Exiting.”); System.exit(1); } } } public void finalize() { try { servSock.close(); } catch(Exception e); […]