Open the project @ "Source Code/JavaChatClient/" in Netbeans IDE, compile it and run it.
Alternatively, you can simply run the compiled IRC Client @ "Source Code/JavaChatClient/dist/JavaChatClient.jar".
Open the project @ "Source Code/Java_IRCd/" in Netbeans IDE, compile it and run it.
Alternatively, you can simply run the compiled IRC Daemon @ "Source Code/Java_IRCd/dist/Java_IRCd.jar", although it is recommended to run it through the IDE so that you can easily terminate it, since it will run as a background service.
Test it using your favorite IRC Client.