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Java Game

Started by shaun23 Mar 29, 2005 at 12:08 AM 1 replies 350+ views

Original Post

Mar 29, 2005 at 12:08 AM

Hey guys, I am new to programming and I was wondering if someone could give me a hand with a small game that I am developing in Java. Here is my code so far...... Class Session This class maintains information about the session between two players. public class Session { private int sessionId; private String playerName; private Date startTime private String State; } What I would like to do,is define 3 different states for the State variable.I would like to define a WAIT_REPLY,ACCEPT_REJECT and PLAY states.The only problem is that I am not sure how to implement this in Java code.

Zodiak

Mar 29, 2005 at 12:37 AM

Hm, I don't quite undertand what you need... Why not just assign either of these states to your field? Or use an enumeration with these possible states? Can you please make it a bit more clear, then I am sure I'd be able to help!

Zahlman

257

Zahlman

Mar 29, 2005 at 1:56 AM

Java 1.4.x and previous do not provide enumerated types, but there are workarounds of various complexity depending on what you need. Some options are considerably more powerful than the usual C++ style concept. However, you may find it easiest (most familiar) to just do something like:

public class Session{private int sessionId;private String playerName;private Date startTime;// Use static, final variables to specify the possible values for the State// variable. These can generally be relied upon to be inlined by the javac// optimizer - across class boundaries, too, if you make them public - because// the compiler knows that the values will not change and do not need to be// created per object.private static int WAIT_REPLY = 0;private static int ACCEPT_REJECT = 1;private static int PLAY = 2;private int State; // of course, you could use Strings too, and have the string// text give a friendly name to each state - that'd be the next step up in// complexity.}

It has also been brought to my attention that Java 1.5 does provide an enumeration facility, although it's really syntactic sugar for one of the more powerful represent-it-with-a-class idioms.

[Edited by - Zahlman on March 29, 2005 2:56:19 AM]

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