/* * To change this template, choose Tools | Templates * and open the template in the editor. */package client;/** * * @author Administrator */import java.awt.*;import javax.swing.*;import java.awt.event.*;import java.io.*;import java.net.*;public class ChoiceFile extends Panel implements ItemListener,ActionListener,Runnable{   Button 得到試題文件=null;   Choice list=null;    Socket  socket=null;   DataInputStream in=null;    DataOutputStream out=null;    Thread thread=null;   boolean success=false, isSelected=false;   int n=0;      public ChoiceFile()    {      得到試題文件=new Button("將試題文件添加到下拉列表中");      得到試題文件.setEnabled(false);      得到試題文件.addActionListener(this);      list=new Choice();      list.add("**********");      add(得到試題文件);      add(list);      list.addItemListener(this);      thread=new Thread(this);    }  public void setSocketConnection(Socket socket,DataInputStream in,DataOutputStream out)    {      this.socket=socket;      this.in=in;      this.out=out;       try {            thread.start();           }      catch(Exception ee)          {          }      if(this.socket!=null)       {         得到試題文件.setEnabled(true);       }     }   public void actionPerformed(ActionEvent e)    {         try            {              out.writeUTF("列出考試文件");           }           catch(IOException ee)           {              success=false;           }           }   public void itemStateChanged(ItemEvent e)    {       n=list.getItemCount();      if(n>=1&&isSelected==true)        {          String listItem=list.getSelectedItem();           try              {                out.writeUTF("考試文件的名字:"+listItem);                out.writeUTF("請通知考試界面考試用時:");              }           catch(IOException ee)              {              }        }            }  public String 得到選擇的文件名()   {    return list.getSelectedItem();   }  public void run()   {    String s=null;    list.removeAll();    while(true)      {         try           {             s=in.readUTF();                        if(s.startsWith("考試文件:"))                 {                   String listItem=s.substring(s.indexOf(":")+1);                   list.add(listItem);                   isSelected=true;                 }               if(s.startsWith("已經全部列出:"))                 {                   success=true;                    break;                 }                          }        catch (Exception ee)            {           }         } } public boolean getSuccess() {    n=list.getItemCount();   if(n>0&&success==true)      return true;   else      return false; }}