chatclient.java

用java写的一个聊天室小程序

import java.awt.*;
import java.awt.event.*;
import java.io.*;
import java.net.*;

public class ChatClient extends Frame{
	
	TextField tfTxt = new TextField();	
	TextArea taContent = new TextArea();
	
	Socket s = null;
	DataOutputStream dos = null;
	DataInputStream dis = null;
	private boolean beConnected = false;

	public static void main(String[] args) {
		new ChatClient().launchFrame();
	}
	
	public void launchFrame(){
		this.setLocation(300, 300);
		this.setSize(300, 300);
		add(tfTxt, BorderLayout.SOUTH);
		add(taContent, BorderLayout.NORTH);
		pack();
		this.addWindowListener(new WindowAdapter(){

			public void windowClosing(WindowEvent e) {
				disconnect();
				System.exit(0);
			}
			
		});
		tfTxt.addActionListener(new TFListener());
		this.setVisible(true);
		connect();
		
		new Thread(new recThread()).start();
	}
	
	public void connect(){
		try {
			s = new Socket("127.0.0.1", 8888);
			dos = new DataOutputStream(s.getOutputStream());
			dis = new DataInputStream(s.getInputStream());
			beConnected = true;
		} catch (UnknownHostException e) {			
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}
	}
	
	public void disconnect(){
		try {
			dos.close();
			dis.close();
			s.close();
		} catch (IOException e) {
			e.printStackTrace();
		}
		
	}
	
	private class TFListener implements ActionListener{

		public void actionPerformed(ActionEvent e) {
			String str = tfTxt.getText().trim();
			//taContent.setText(str);
			tfTxt.setText("");
			try {
				dos.writeUTF(str);
				dos.flush();
				//dos.close();
			} catch (IOException e1) {
				e1.printStackTrace();
			}
		}
		
	}
	
	private class recThread implements Runnable {

		public void run() {
			try {
				while(beConnected){				
						String str = dis.readUTF();
						//System.out.println(str);
						taContent.setText(taContent.getText() + str +  '\n');
				}
			} catch(IOException e) {
				e.printStackTrace();
			}
			
		}
		
	}
}