问题描述
我刚写了一个基于java AWT窗体的聊天服务端,可是我明明调用了setVisible(true)，却看不见任何窗口，如果有时间的话，帮我看看是怎么回事，谢了(有点长!)/** * @(#)chatroom.java * * chatroom application * * @author * @version 1.00 2008/9/20 */ import java.awt.*; import java.awt.event.*; import java.io.*; import java.net.*; public class chatroom extends Frame implements Runnable{sender se;reciver re;myPanel panel;Thread t1,t2;String s1,s2;ServerSocket ss;public chatroom()throws Exception{try{ss=new ServerSocket(4321);}catch(Exception e){e.printStackTrace();}panel=new myPanel();se=new sender(ss);reciver re=new reciver(ss);t1=new Thread(se);t2=new Thread(re);add(panel);s1=new String("");s2=new String("");setSize(300,500);setVisible(true);}public void run(){t1.start();t2.start();while(true){if((s1=re.getMsg())!="") panel.text.append(s1+"n");if((s2=panel.getMsg())!="")se.msg=s1;if(t1==null || t2==null)break;}}public static void main(String[] args)throws Exception{chatroom cr=new chatroom();Thread t=new Thread(cr);t.start();}}class sender implements Runnable{Object obj;Socket s;OutputStream os;PrintStream ps;String msg;public sender(){}public sender(ServerSocket ss)throws Exception{s=ss.accept();os=s.getOutputStream();ps=new PrintStream(os);msg="";}public void run() {while(true){ try{ if(msg!=""){ ps.print(msg); msg=""; } else if(msg=="bye") break; else wait(); }catch(Exception e){ e.printStackTrace(); }}try{s.close();ps.close();}catch(Exception e){e.printStackTrace();}}public void getMsg(String s){ msg=s; notify();}}class reciver implements Runnable{Socket s;InputStream is;DataInputStream dis;String msg;public reciver(){}public reciver(ServerSocket ss)throws Exception{s=ss.accept();is=s.getInputStream();dis=new DataInputStream(is);msg="";}public void run(){while(true){try{ msg=dis.readLine(); if(msg=="bye") break;}catch(Exception e){e.printStackTrace();}}try{s.close();dis.close();}catch(Exception e){e.printStackTrace();}}public String getMsg(){if(msg!="")try{return msg;}finally{msg="";}return null;}}class myPanel extends Panel{TextArea text;TextField tf;String msg;public myPanel(){msg="";setLayout(new BorderLayout());text=new TextArea(50,100);tf=new TextField();text.setEditable(false);//tf.setToolTipText("Enter your message here");add("Center",text);add("South",tf);tf.addActionListener(new ActionListener(){public void actionPerformed(ActionEvent e){if(tf.getText()!="")msg=tf.getText();tf.setText("");}});}public String getMsg(){return msg;}}
解决方案
对socket不是很懂，你把chatroom ctor改一下，估计与线程有关系public chatroom() throws Exception {ss = new ServerSocket(1234);panel = new myPanel();add(panel);s1 = new String("");s2 = new String("");setSize(300, 500);setVisible(true);se = new sender(ss);reciver re = new reciver(ss);t1 = new Thread(se);t2 = new Thread(re);}