appletclient.java

来自「java网络高级编程的配套源码,java网络高级编程为清华出版社出版.」· Java 代码 · 共 74 行

/*源程序清单8-19*/

import java.applet.*;
import borland.jbcl.layout.*;
import java.net.*;
import java.awt.*;
import java.awt.event.*;

public class AppletClient extends Applet implements ActionListener
{
	String hostname;
	int port=8888;
	TextField textField=new TextField();
	static TextArea textArea=new TextArea();
	Button button=new Button();
	VerticalFlowLayout verticalFlowLayout = new VerticalFlowLayout();
	UserThread userThread=null;
		
	public AppletClient()
	{
		try
    {
      String p=getParamter("port");
      port=Integer.parseInt(p);
      URL url=this.getCodeBase();
      String temp=url.getHost();
      if(!(temp.equals("")))
        hostname=temp;
      else
        hostname="127.0.0.1";
      jbInit();
 			Socket socket=new Socket(hostname, port);
			userThread=new UserThread(socket);
			userThread.start();
   	}
		catch(Exception e)
		{
			System.out.println(e.toString());
		}
	}

	public void jbInit() throws Exception
	{
		button.setLabel("发送信息");
		this.setLayout(verticalFlowLayout);
		textArea.setEditable(false);
		this.add(textArea,null);
		this.add(textField,null);
		this.add(button,null);
		textField.addActionListener(this);
		button.addActionListener(this);
	}

  public void actionPerformed(ActionEvent e)
  {
  	Component com=(Component)e.getSource();
    if(e.equals(button)||e.equals(textField))
    {
		  sendString();
    }
  }

  public void sendString()
  {
		String str=textField.getText();
	  if(userThread!=null)
    {
    	userThread.sendString(str);
      textField.setText("");
    }
  }
}