myclient.java

有大量的java的实例

import java.awt.*;
import java.awt.event.*;
import java.net.*;
import java.io.*;
public class MyClient extends Frame implements ActionListener
{
   Socket ClientSocket;
   PrintStream os;
   BufferedReader is;
   String s;
   Label Mylabel=new Label("欢迎使用本机提供的信息");
   TextArea textArea;
   Button MyButton = new Button("发送");
   public MyClient()
   {
    setTitle("Client Window");		//建立并显示与Server通讯的信息窗口
    setLayout(new BorderLayout());
    this.addWindowListener(new WinAdptClient(this));
    MyButton.addActionListener(this);
    textArea=new TextArea(20,50);
    add("North",Mylabel);
    add("South",MyButton);
    add("Center",textArea);
    setResizable(false);
    pack();
    show();
    connect();			 //与Server端连接通讯
   }
   public void connect()
   {
    try{   
     ClientSocket=new Socket("sd-7404",8000); 	//连向Server主机的8000端口
     os=new PrintStream(
         new BufferedOutputStream(ClientSocket.getOutputStream()));
     is=new BufferedReader(new InputStreamReader(ClientSocket.getInputStream()));

     s=is.readLine();					//从Server端读入数据
     textArea.append(s+"\n");
    }
    catch(Exception e){}	
   }
   public void actionPerformed(ActionEvent e)
   {	//当点击按钮时向Server端发送信息
     if(e.getSource()==MyButton)
     {
       try{
	    os.print(textArea.getText());
	    os.flush();			
       }
       catch(Exception ex){}
   }
  }
  public static void main(String args[])
  {
    new MyClient();
  }
}
class WinAdptClient extends WindowAdapter
{
  MyClient m_Parent;

  WinAdptClient(MyClient p)
  {
	m_Parent = p;
  }
  public void windowClosing(WindowEvent e)
  {
    try{	//关闭窗口前先向Server端发送结束信息，并关闭各输入输出流与连接
      m_Parent.os.println("Bye");
      m_Parent.os.flush();
      m_Parent.is.close();
      m_Parent.os.close();
      m_Parent.ClientSocket.close();
      m_Parent.dispose();
      System.exit(0);
    }catch(Exception ex){}
  }    
}