用JAVA做的简单聊天室

package teacher_code.day16; import java.awt.*; import javax.swing.*; import java.awt.event.*; import java.io.*; import java.net.Socket; public class ChatRoomFrame { private JFrame jf; private JTextArea jta; private JTextField jtf; private JButton jb; private Socket s; private String name; private PrintWriter pw; public ChatRoomFrame(){ jf=new JFrame("聊天室客户端v1.0"); jta=new JTextArea(20,30); jtf=new JTextField(25); jb=new JButton("发送"); getMessage(); init(); setFont(); eventHandle(); } public void getMessage(){ do{ String host=JOptionPane.showInputDialog(jf,"请输入服务器地址："); int port=Integer.parseInt(JOptionPane.showInputDialog(jf,"请输入服务器端口号：")); try { s=new Socket(host,port); pw=new PrintWriter(s.getOutputStream()); } catch (IOException e) { JOptionPane.showMessageDialog(jf,"不能建立到服务器的连接，请重新输入！"); } }while(s==null || pw==null); name=JOptionPane.showInputDialog(jf,"请输入您的用户名："); } public void setFont(){ jta.setFont(new Font("",Font.BOLD,18)); jtf.setFont(new Font("",Font.BOLD,20)); } public void init(){ JScrollPane jsp=new JScrollPane(jta); JPanel jp=new JPanel(); jp.add(new JLabel(name+":")); jp.add(jtf); jp.add(jb); jf.add(jsp,BorderLayout.CENTER); jf.add(jp,BorderLayout.SOUTH); } public void eventHandle(){ ActionListener lis=new ActionListener(){ public void actionPerformed(ActionEvent arg0) { String str=jtf.getText().trim(); if(str==null || str.equals("")){ JOptionPane.showMessageDialog(jf, "不能发送空消息！"); return; } pw.println(name+":"+jtf.getText()); pw.flush(); jtf.setText(""); } }; jb.addActionListener(lis); jtf.addActionListener(lis); jf.addWindowListener(new WindowAdapter(){ public void windowClosing(WindowEvent arg0) { int op=JOptionPane.showConfirmDialog(jf, "确定要退出聊天室吗？","确定退出",JOptionPane.YES_NO_OPTION); if(op==JOptionPane.YES_OPTION){ pw.println("%"+name); pw.flush(); try { Thread.sleep(200); s.close(); } catch (Exception e) { e.printStackTrace(); } System.exit(0); } } }); } public void showMe(){ jf.pack(); jf.setVisible(true); jf.setDefaultCloseOperation(JFrame.DO_NOTHING_ON_CLOSE); new ReadMessageThread(jta,s).start(); } public static void main(String[] args){ new ChatRoomFrame().showMe(); } }