Java实现多个客户端聊天程序

复习了一天Java。晚上写了一个HeartChat 0.1，实现多个客户端相互聊天的机制。代码如下：
 

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

public class HeartClient extends Frame {

    /*
     *  成员方法出场...
     */
    private TextField tfText;
    private TextArea taContent;
    private Socket s;
    private DataOutputStream dos;
    private DataInputStream dis;

    /**
     * 注意，入口... ^^
     * @param args
     */
    public static void main(String[] args) {
        new HeartClient().launchFrame();

    }

    /**
     * Loading GU
     */
    public void launchFrame(){
        tfText = new TextField();
        taContent = new TextArea();
        this.setSize(300,300);
        this.setLocation(300,300);
        this.tfText.addActionListener(new TFListener());
        this.add(tfText,BorderLayout.SOUTH);
        this.add(taContent,BorderLayout.NORTH);
        this.addWindowListener(new WindowAdapter(){
            @Override
            public void windowClosing(WindowEvent e) {
                System.exit(0);
            }});
        this.pack();
        this.connect();
        this.setVisible(true);
    }

    /**
     * 我在努力地连接服务器中...
     */
    public void connect() {
        try {
            s = new Socket("127.0.0.1",1720);
            dos = new DataOutputStream(s.getOutputStream());
            dis = new DataInputStream(s.getInputStream());
            new Thread(new SendThread()).start();
//          dos.writeUTF("Hello,i find u!");
        } catch (UnknownHostException e) {
            System.out.println("UnknownHostException");
            e.printStackTrace();
        } catch (IOException e) {
            System.out.println("IOException");
            e.printStackTrace();
        }finally{
            //关闭啥尼...
        }

    }

    /**
     * 额不会傻等着tfText(TextField tfText的监听器类)
     */
    class TFListener implements ActionListener{
        private String str;
        @Override
        public void actionPerformed(ActionEvent e) {
            str = tfText.getText().trim();
            tfText.setText("");
            try {
                dos.writeUTF(str);
            } catch (IOException e1) {
                System.out.println("IOException");
                e1.printStackTrace();
            }
        }

    }

    /**
     * 客户端接收消息的线程呦...
     *
     */
    class SendThread implements Runnable{
        private String str;
        private boolean iConnect = false;

        public void run(){
            iConnect = true;
            recMsg();

        }

        /**
         * 消息，看招，哪里跑...（客户端接收消息的实现）
         * @throws IOException
         */
        public void recMsg() {
            try {
                while(iConnect){
                    str = dis.readUTF();
                    taContent.setText(str);
                }
            } catch (IOException e) {
                e.printStackTrace();
            }

        }

    }

}

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

public class HeartClient extends Frame {

	/*
	 *  成员方法出场...
	 */
	private TextField tfText;
	private TextArea taContent;
	private Socket s;
	private DataOutputStream dos;
	private DataInputStream dis;
	
	/**
	 * 注意，入口... ^^
	 * @param args
	 */
	public static void main(String[] args) {
		new HeartClient().launchFrame();
		
	}
	
	/**
	 * Loading GU
	 */
	public void launchFrame(){
		tfText = new TextField();
		taContent = new TextArea();
		this.setSize(300,300);
		this.setLocation(300,300);
		this.tfText.addActionListener(new TFListener());
		this.add(tfText,BorderLayout.SOUTH);
		this.add(taContent,BorderLayout.NORTH);
		this.addWindowListener(new WindowAdapter(){
			@Override
			public void windowClosing(WindowEvent e) {
				System.exit(0);
			}});
		this.pack();
		this.connect();
		this.setVisible(true);
	}

	/**
	 * 我在努力地连接服务器中...
	 */
	public void connect() {
		try {
			s = new Socket("127.0.0.1",1720);
			dos = new DataOutputStream(s.getOutputStream());
			dis = new DataInputStream(s.getInputStream());
			new Thread(new SendThread()).start();
//			dos.writeUTF("Hello,i find u!");
		} catch (UnknownHostException e) {
			System.out.println("UnknownHostException");
			e.printStackTrace();
		} catch (IOException e) {
			System.out.println("IOException");
			e.printStackTrace();
		}finally{
			//关闭啥尼...
		}
		
	}

	/**
	 * 额不会傻等着tfText(TextField tfText的监听器类)
	 */
	class TFListener implements ActionListener{
		private String str;
		@Override
		public void actionPerformed(ActionEvent e) {
			str = tfText.getText().trim();
			tfText.setText("");
			try {
				dos.writeUTF(str);
			} catch (IOException e1) {
				System.out.println("IOException");
				e1.printStackTrace();
			}
		}
		
	}
	
	/**
	 * 客户端接收消息的线程呦...
	 *
	 */
	class SendThread implements Runnable{
		private String str;
		private boolean iConnect = false;
		
		public void run(){
			iConnect = true;
			recMsg();
			
		}
		
		/**
		 * 消息，看招，哪里跑...（客户端接收消息的实现）
		 * @throws IOException 
		 */
		public void recMsg() {
			try {
				while(iConnect){
					str = dis.readUTF();
					taContent.setText(str);
				}
			} catch (IOException e) {
				e.printStackTrace();
			}
			
		}
		
	}
	
}