求一个JAVA编的聊天小程序。

以下基于TCP/IP协议:

16.聊天室服务器端逻辑
//Debug.java
import java.util.*;
public class Debug {
public static String p(String s) {
System.out.println(s);
return s;
}
public static Object p(Object O) {
System.out.println(O.toString());
return O;
}
public static Object[] p(Object[] O) {
System.out.print("[");
String s = "";
for (Object o : O) {
System.out.print(s);
System.out.print(o.toString());
s = ",";
}
System.out.println("]");
return O;
}
public static int p(int i) {
System.out.println(i);
return i;
}
public static long p(long i) {
System.out.println(i);
return i;
}
public static Map.Entry p(Map.Entry l) {
System.out.println(l);
return l;
}
public static HashSet p(HashSet l) {
System.out.println(l);
return