最简易的基于JAVA的局域网聊天工具

import java.awt.*; import java.awt.event.*; import java.net.*; import java.io.*; public class Server1 extends WindowAdapter implements ActionListener{ ServerSocket server; Socket client; boolean flag; BufferedReader cin; PrintWriter cout; Frame f; Button bl; TextArea ta; TextField tf; public Server1(){ try{ server=new ServerSocket(8888); this.ChatFrame(" 服务器 端口号："+server.getLocalPort()); flag=true; while(flag){ client=server.accept(); System.out.println("已建立连接"); InputStream is=client.getInputStream(); cin=new BufferedReader(new InputStreamReader(is)); OutputStream os=client.getOutputStream(); cout=new PrintWriter(os,true); String aline; while((aline=cin.readLine())!=null){ ta.append("杨桐: "+aline+"\n"); if(aline.equals("bye")){ flag=false; break; } } is.close(); cin.close(); os.close(); cout.close(); client.close(); } } catch(Exception e) { System.out.println(e); } } public void ChatFrame(String str) { f=new Frame("双人聊天程序"+str); f.setSize(350,500); ta=new TextArea(); f.add(ta); ta.setEditable(false); Panel p=new Panel(); f.add(p,"South"); tf=new TextField(20); bl=new Button("发送"); p.add(tf); p.add(bl); bl.addActionListener(this); tf.addActionListener(this); f.setVisible(true); f.addWindowListener(this); } public void actionPerformed(ActionEvent e){ ta.append("张晓枫： "+tf.getText()+"\n"); cout.println(tf.getText()); tf.setText(""); } public void windowClosing(WindowEvent e){ cout.println("bye"); System.exit(0); } public static void main(String args[]){ new Server1(); } }