我正在编写一个简单的聊天客户端，并将其移动到一个漂亮的GUI。服务器端的构造函数（客户端是android）包含一个在JFrame中的列表，服务器的第一部分运行，但随后整个框架锁定。有谁看到这个问题？对不起，相对杂乱无章的评论代码...... 服务器：
import java.awt.List;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.InetAddress;
import java.net.ServerSocket;
import java.net.Socket;
import java.net.SocketException;
import java.net.UnknownHostException;
public class ChatServer {
private final int CHAT_PORT = 4453;
ServerSocket sSocket;
Socket cSocket;
PrintWriter pWriter;
BufferedReader bReader;
InetAddress localAddr;
List messageList;
public ChatServer(List entList)
{
messageList = entList;
}
public synchronized void run()
{
messageList.add("Chat Server Starting...");
try {
localAddr = InetAddress.getLocalHost();
} catch (UnknownHostException e1) {
messageList.add("InnetAddress error");
}
while(true)
{
try {
sSocket = new ServerSocket(CHAT_PORT);
sSocket.setReuseAddress(true);
messageList.add("Server has IP:" + localAddr.getHostAddress());
messageList.add("Server has hostname:" + localAddr.getHostName());
messageList.add("Server has port:" + CHAT_PORT);
} catch (IOException e) {
//ERRORS
if(cSocket.isConnected())
{
messageList.add("User disconnected\n");
try {
cSocket.close();
} catch (IOException e1) {
messageList.add("Error closing client socket");
}
}
else
{
messageList.add("ERROR CREATING SOCKET\n");
}
}
try {
cSocket = sSocket.accept();
cSocket.setReuseAddress(true);
messageList.add("INFO: socket connected");
} catch (IOException e) {
messageList.add("Client Socket Error");
System.exit(-1);
}
try {
pWriter = new PrintWriter(cSocket.getOutputStream(), true);
messageList.add("INFO: Print writer opened");
} catch (IOException e) {
messageList.add("PrintWriter error");
}
try {
bReader = new BufferedReader(new InputStreamReader(cSocket.getInputStream()));
messageList.add("INFO: buffered reader opened");
} catch (IOException e) {
messageList.add("BufferedReader error");
}
String inputLine;
try {
while((inputLine = bReader.readLine()) != null)
{
messageList.add(inputLine);
if(inputLine.equals("close"))
{
close();
}
}
} catch (IOException e) {
messageList.add("Buffered Reader error");
}
}
}
public synchronized void close()
{
messageList.add("****Server closing****");
try {
sSocket.close();
} catch (IOException e) {
messageList.add("Error closing server socket");
}
try {
cSocket.close();
} catch (IOException e) {
messageList.add("Error closing client socket");
}
pWriter.close();
try {
bReader.close();
} catch (IOException e) {
messageList.add("Error closing buffered reader");
}
messageList.add("****It's been fun, but I've got to go.****\n****Server has shut down.****");
System.exit(0);
}
}
GUI：
import java.awt.EventQueue;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.border.EmptyBorder;
import javax.swing.JOptionPane;
import javax.swing.JTextField;
import javax.swing.JButton;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JMenu;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import java.awt.List;
import java.awt.Toolkit;
@SuppressWarnings("serial")
public class ClientGUI extends JFrame {
private JPanel contentPane;
private JTextField txtEnterTextHere;
private JMenuBar menuBar;
private List messageList;
private JMenu mnOptions;
private JMenu mnHelp;
private JMenuItem mntmStartServer;
private JMenuItem mntmStopServer;
private JMenuItem mntmConnectionInfo;
private JMenuItem mntmEmailDeveloper;
private static String userName;
private ChatServer cServer;
/**
* Launch the application.
*/
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
public void run() {
try {
ClientGUI frame = new ClientGUI();
frame.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
/**
* Create the frame.
*/
public ClientGUI() {
setTitle("Ben's Chat Client");
setResizable(false);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setBounds(100, 100, 450, 300);
menuBar = new JMenuBar();
setJMenuBar(menuBar);
JMenu mnFile = new JMenu("File");
menuBar.add(mnFile);
JMenuItem mntmExit = new JMenuItem("Exit");
mntmExit.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
JOptionPane.showConfirmDialog(null, "Are you sure you want to exit?");
}
});
mnFile.add(mntmExit);
mnOptions = new JMenu("Options");
menuBar.add(mnOptions);
mntmStartServer = new JMenuItem("Start Server");
mntmStartServer.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
ChatServer cServer = new ChatServer(messageList);
cServer.run();
}
});
mnOptions.add(mntmStartServer);
mntmStopServer = new JMenuItem("Stop Server");
mnOptions.add(mntmStopServer);
mntmConnectionInfo = new JMenuItem("Connection Info");
mnOptions.add(mntmConnectionInfo);
mnHelp = new JMenu("Help");
menuBar.add(mnHelp);
mntmEmailDeveloper = new JMenuItem("Email Developer");
mnHelp.add(mntmEmailDeveloper);
contentPane = new JPanel();
contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
setContentPane(contentPane);
contentPane.setLayout(null);
txtEnterTextHere = new JTextField();
txtEnterTextHere.setBounds(10, 220, 334, 20);
txtEnterTextHere.setText("Enter text here...");
contentPane.add(txtEnterTextHere);
txtEnterTextHere.setColumns(10);
JButton btnSend = new JButton("Send");
btnSend.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
messageList.add(userName + ": " + txtEnterTextHere.getText().toString());
}
});
messageList = new List();
btnSend.setBounds(349, 219, 85, 23);
contentPane.add(btnSend);
messageList.setBounds(10, 10, 424, 204);
contentPane.add(messageList);
}
public static String getUsername()
{
return userName;
}
public static void setUsername(String entName)
{
userName = entName;
}
}
谢谢！
答案 0 :(得分：2)
看起来您正在Swing线程上启动服务器（请参阅：The Event Dispatch Thread）。只要您在cServer.run();中拨打ActionListener，就会阻止EDT执行任何其他操作（例如更新JFrame并回复事件）。改为在后台线程中启动服务器：
new Thread(new Runnable()
{
@Override
public void run()
{
// start your server
}
}).start();