fifo.java

一个很好的JAVA聊天室系统 可以在课堂里实践并且进行聊天

import java.util.Vector;
import java.util.*;

public class FIFO extends Vector {
  public String pop() {
    String s="";
    try { s = (String) firstElement();}
    catch(NoSuchElementException e) {
        System.out.println("FIFO EMPTY!!!!!"); s = "";}
    try { removeElement(s); }
    catch(ArrayIndexOutOfBoundsException e) {
        System.out.println("FIFO EMPTY!!!!!");}
    return s;
  }

  public void push(String s) { addElement(s);}

  public boolean empty() { return isEmpty(); }

}