简单聊天室服务程序，前台假死问题

[squalliskm]

我设置的是前台控制，点击startserver按钮，主窗体假死，但是后台运行正常。如果用客户端像服务器发送一条消息，主窗体假死现象消失，求保持目前框架的解决方法

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.io.*;
import java.net.*;

public class chatserver extends JFrame implements ActionListener
{
JPanel panebt =new JPanel();
JPanel panetxt =new JPanel();
JPanel pane =new JPanel();
JButton btstart =new JButton("start server");
JButton btbackup =new JButton("backup log");
JButton btstop =new JButton("stop server");
TextArea txtlog =new TextArea();
JFrame frame=new JFrame("my");

public chatserver()
{
pane.add(panetxt);
pane.add(panebt);

setContentPane(pane);
panetxt.add(txtlog);
panebt.add(btstart);
panebt.add(btbackup);
panebt.add(btstop);

panebt.setLayout(new BoxLayout(panebt,BoxLayout.X_AXIS));
panetxt.setLayout(new GridLayout(1,1,1,1));
pane.setLayout(new BoxLayout(pane,BoxLayout.Y_AXIS));
txtlog.setSize(800,600);
setLocation(80,80);
setTitle("server");
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
btstop.setEnabled(false);
pack();
show();


btstart.addActionListener(this);
btstop.addActionListener(this);
btbackup.addActionListener(this);

}


public static void main (String[] abc)
{
new chatserver();
}
public void actionPerformed(ActionEvent e)
{
if(e.getSource()==btstart)
{
txtlog.append("server opening..........\n");
btstart.setEnabled(false);
btstop.setEnabled(true);
serverstart();
}
else if(e.getSource()==btbackup)
{

}
else if(e.getSource()==btstop)
{
txtlog.append("server stoping..........\n");
btstart.setEnabled(true);
btstop.setEnabled(false);
}


}

public void serverstart()
{
try
{
ServerSocket srv = new ServerSocket(2000);
txtlog.append("port 2000 opented...");
Socket sock= srv.accept();
BufferedReader br=new BufferedReader(
new InputStreamReader(
sock.getInputStream()
)
);


String str=br.readLine();

br.close();
}
catch (IOException e)
{
System.out.println("异常："+e);
}
}
public void serverstop()
{

}
public void serverckup()
{

}
}

[squalliskm]

顶一下

[zealVampire]

public void serverstart()
{
try
{
ServerSocket srv = new ServerSocket(2000);
txtlog.append("port 2000 opented...");
Socket sock= srv.accept();


因为你点按钮后启动这个方法.
Socket sock= srv.accept();是阻塞的, 就是说用户不来连接这个accept是不会返回的
所以假死,
可以新建一个线程.启动服务器.

[剑事]

要多线程才可以