简单聊天室的实现

?哎呀，还有点不会用，刚明白怎么添加图片，最仅这两天会吧以前做过的东西传到这上面来，希望大家关注

服务器端的代码

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.JLabel;import javax.swing.JPanel;import javax.swing.JTextArea;import javax.swing.JTextField;public class newClient extends JFrame{private JPanel p= new JPanel();private JTextField jtf1 = new JTextField();    private JTextArea jta1 = new JTextArea();    private DataOutputStream toserver ;    private DataInputStream fromserver;    private JButton button  = new JButton("发送");      public newClient(){    p.setLayout(new BorderLayout());      JPanel p2 = new JPanel();    p2.setLayout(new BorderLayout());       p2.add(jtf1,BorderLayout.CENTER);    p2.add((new JLabel("NND 你一定不要忘了曾经的承诺和坚持")),BorderLayout.SOUTH);    p2.add(button,BorderLayout.EAST);    p.add(p2,BorderLayout.SOUTH);    p.add(jta1,BorderLayout.CENTER);    this.setTitle("最简单的聊天室-----antking");    this.add(p);    this.setSize(500,300);    this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);    this.setVisible(true);    button.addActionListener(new buttonListener());        try {    Socket client = new Socket("localhost",54321);toserver = new DataOutputStream(client.getOutputStream());fromserver = new DataInputStream(client.getInputStream());while(true){String msg =fromserver.readUTF();if(msg!=null)jta1.append(msg+"\n");}} catch (UnknownHostException e) {e.printStackTrace();} catch (IOException e) {e.printStackTrace();}     }     private class buttonListener implements ActionListener{public void actionPerformed(ActionEvent e) {String str = jtf1.getText().toString();try {toserver.writeUTF(str);toserver.flush(); } catch (UnknownHostException e1) {e1.printStackTrace(); } catch (IOException e1) {e1.printStackTrace();}}          }public static void main(String[] args) {new newClient();}}