echoclientgui1.java

java应用开发详解

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

public class EchoClientGUI1 implements MouseListener,WindowListener 
{
    Socket echoSocket = null;
    PrintWriter out = null;
    BufferedReader in = null;
    TextField t = null;
    TextField t2 = null;

        
    public static void main(String[] args) throws IOException 
    {
    	EchoClientGUI1 self = new EchoClientGUI1();
    	self.go(self);
    	
    }	     
    public void go(EchoClientGUI1 self) throws IOException 
    {  
        //实例一个容器组件
        Frame f = new Frame( "Example" );
        
        //设置边界大小
        f.setBounds( 0,0,300,300 );
        
        //实例化一个网格组布局管理器 
        GridBagLayout gridbag = new GridBagLayout();
        //实例化一个网格组布局管理器的辅助限制类
        GridBagConstraints c = new GridBagConstraints();
        
        //设置布局管理器
        f.setLayout(gridbag );
               
        c.fill = GridBagConstraints.BOTH;
         
         c.weightx = 0.0;
         c.gridwidth = GridBagConstraints.RELATIVE;
         Button b = new Button( "send" );
         gridbag.setConstraints( b, c );
         f.add( b,c );
         
         c.weightx = 1.0;
     	 t = new TextField( "write some thing to send" );
         c.gridwidth = GridBagConstraints.REMAINDER; 
         gridbag.setConstraints( t, c );
         f.add( t,c );
         
         
         c.weightx = 1.0;
         t2 = new TextField();
         c.gridwidth = GridBagConstraints.REMAINDER; 
         gridbag.setConstraints( t2, c );
         f.add( t2,c );


        try 
        {
            echoSocket = new Socket ( "localhost", 1111); 
            out = new PrintWriter(echoSocket.getOutputStream(), true);
            in = new BufferedReader(new InputStreamReader(echoSocket.getInputStream()));
        } 
        catch (UnknownHostException e) 
        {
            System.err.println("Don't know about host: localhost.");
            System.exit(1);
        } 
        b.addMouseListener(self);

        f.addWindowListener(self);
        
        f.setVisible( true );
        in.readLine();
        in.readLine();
        }

        //button的鼠标事件
        public void mouseClicked(MouseEvent e) 
        {
            try
            {
            out.println(t.getText());
            
            t2.setText(in.readLine()) ;
            }catch(IOException ie){}
        }
        
        //关闭窗口
        public void windowClosing(WindowEvent e)
        {
             try
             {
             out.close();
	     in.close();
             echoSocket.close();
             System.exit(0);
             }catch(IOException ie){}
         }
         
         //实现接口中的方法
         public void windowActivated(WindowEvent e) {}      
         public void windowDeactivated(WindowEvent e)  {}          
         public void windowDeiconified(WindowEvent e)   {}        
         public void windowIconified(WindowEvent e)  {} 
         public void windowOpened(WindowEvent e)   {} 
         public void windowClosed(WindowEvent e)   {} 
         public void mouseEntered(MouseEvent e) {}        
         public void mouseExited(MouseEvent e) {}          
         public void mousePressed(MouseEvent e) {}     
         public void mouseReleased(MouseEvent e)  {}
}