import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.net.ServerSocket;
import java.net.Socket;

import javax.swing.JFrame;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;


public class Server implements ActionListener {

    public Server(){
        JFrame jf = new JFrame("服務器窗口");
        JMenu jm = new JMenu("Admin");
        JMenuItem jmi = new JMenuItem("Start");
        jmi.addActionListener(this);
        JMenuBar jmb = new JMenuBar();
        jm.add(jmi);
        jmb.add(jm);
        jf.setJMenuBar(jmb);
        jf.setSize(200, 300);
        jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        jf.setVisible(true);
    }
    public static void main(String[] args) {
        new Server();

    }
    public void actionPerformed(ActionEvent e) {
        try {
            ServerSocket ss = new ServerSocket(8888);
            Socket so = ss.accept();
            new ServerThread(so).start();
        } catch (Exception e1) {
            e1.printStackTrace();
        }
        
    }

}
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.net.Socket;


public class ServerThread extends Thread{
    private Socket so;
    private String word;
    public ServerThread(Socket so){
        this.so = so;
    }
    public void run(){
        try {
            DataInputStream dis = new DataInputStream(so.getInputStream());
            DataOutputStream dos = new DataOutputStream(so.getOutputStream());
            while(true){
                String temp = dis.readUTF();
                if("bye".equals(temp)) break;
                word = "Server:"+temp;
                dos.writeUTF(word);
            }
            dos.close();dis.close();so.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}
import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.net.Socket;
import java.net.UnknownHostException;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JTextArea;
import javax.swing.JTextField;


public class Client implements ActionListener{
    JFrame jf = new JFrame("客戶端窗口");
    JButton jb1 = new JButton("Send");
    JTextField jtf = new JTextField(15);
    JTextArea jta = new JTextArea();
    public Client(){    
        JPanel jp1 = new JPanel();
        jp1.add(jtf);jp1.add(jb1);
        jb1.addActionListener(this);
        jf.setLayout(new BorderLayout());
        jf.add(jp1,new BorderLayout().NORTH);
        jf.add(jta);
        jf.setSize(300, 400);
        jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        jf.setVisible(true);
    }
    public static void main(String args[]){
        new Client();
    }
    public void actionPerformed(ActionEvent e) {
        if(e.getSource()==jtf || e.getSource()==jb1){
            try {
                Socket so = new Socket("127.0.0.1",8888);
                DataInputStream dis = new DataInputStream(so.getInputStream());
                DataOutputStream dos = new DataOutputStream(so.getOutputStream());
                while(true){
                    String temp = jtf.getText();
                    dos.writeUTF(temp);
                    if("bye".equals(temp)) break;
                    String str = dis.readUTF();
                }
                dos.close();dis.close();so.close();
            }catch (IOException e1) {
                e1.printStackTrace();
            }
            
        }
        
    }
}
運行時，老是報錯誤：
java.net.SocketException: Connection reset
 at java.net.SocketInputStream.read(Unknown Source)
 at java.net.SocketInputStream.read(Unknown Source)
 at java.io.DataInputStream.readUnsignedShort(Unknown Source)
 at java.io.DataInputStream.readUTF(Unknown Source)
 at java.io.DataInputStream.readUTF(Unknown Source)
 at ServerThread.run(ServerThread.java:18)
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有人說，我的客戶端里要再寫一個線程，因為main線程主要是用于維護圖形界面，要另寫個線程來發送數據到客戶端
是這樣嗎？