Java實現多個用戶端聊天程式

複習了一天Java。晚上寫了一個HeartChat 0.1，實現多個用戶端相互聊天的機制。代碼如下：

import java.io.*;import java.net.*;import java.util.*;public class HeartServer {         /*     * 成員變數閃亮登場     */    List<ClientThread> clients = new ArrayList<ClientThread>();        /**     * 這系入口啊，向這裡看齊...     * @param args     */    public static void main(String[] args) {        new HeartServer().start();    }        /**     * 啟動伺服器中...     *     */    public void start(){        try {            boolean iConnect = false;            ServerSocket ss = new ServerSocket(1720);            iConnect = true;            while(iConnect){System.out.println("綁定伺服器連接埠成功！");                Socket s = ss.accept();                ClientThread currentClient = new ClientThread(s);//建立線程引用System.out.println("發現用戶端！");                clients.add(currentClient);//把當前用戶端加入集合                new Thread(currentClient).start();System.out.println("用戶端進程已經啟動！");            }        } catch (IOException e) {            System.out.println("IOException");            e.printStackTrace();        }    }        /**     * 給每個用戶端留個家（用戶端的進程）     *     */    class ClientThread implements Runnable {        /*         * 成員變數又來啦...         */        private Socket s;        private DataInputStream dis;        private DataOutputStream dos;        private String str;        private boolean iConnect = false;                /**         * 小構一下         */        ClientThread(Socket s){            this.s = s;            iConnect = true;        }                public void run(){System.out.println("run方法啟動了！");            try {                                while(iConnect){System.out.println("RUN方法中的while迴圈啟動，正在等待用戶端的發送訊息...");                    dis = new DataInputStream(s.getInputStream());                    str = dis.readUTF();System.out.println(str);                    for(int i=0; i<clients.size(); i++){System.out.println("轉寄訊息中..."+i);                        ClientThread c = clients.get(i);                        c.sendMsg(str);                    }                }            } catch (IOException e) {                e.printStackTrace();            }                    }                /**         * 轉寄訊息，我做主...         * 將送至伺服器的訊息發送給每個串連到的用戶端         */        public void sendMsg(String str){            try {System.out.println("建立輸出管道！");                dos = new DataOutputStream(this.s.getOutputStream());System.out.println("正在向用戶端寫訊息！");                dos.writeUTF(str);System.out.println("正在向用戶端寫訊息成功！");                        } 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 {    /*     *  成員方法出場...     */    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);    }    /**     * 我在努力地串連伺服器中...     */    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{            //關閉啥尼...        }            }    /**     * 額不會傻等著tfText(TextField tfText的監聽器類)     */    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();            }        }            }        /**     * 用戶端接收訊息的線程呦...     *     */    class SendThread implements Runnable{        private String str;        private boolean iConnect = false;                public void run(){            iConnect = true;            recMsg();                    }                /**         * 訊息，看招，哪裡跑...（用戶端接收訊息的實現）         * @throws IOException          */        public void recMsg() {            try {                while(iConnect){                    str = dis.readUTF();                    taContent.setText(str);                }            } catch (IOException e) {                e.printStackTrace();            }                    }            }    }