applet2.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 80 行

/*源程序清单4-10*/

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

public class Applet2 extends Applet
{
  XYLayout xYLayout1 = new XYLayout();
  boolean isStandalone = false;
  Button button1 = new Button();
  TextField textField1 = new TextField();
  Label label1 = new Label();
  AppletContext ac=null;
  Applet applet=null;

  //Construct the applet
  
  public Applet2() {
  }
//Initialize the applet
  
  public void init()
  {
    try
    {
      jbInit();
    }
    catch (Exception e)
    {
      e.printStackTrace();
    }
  }

  private void jbInit() throws Exception
  {
    this.setBackground(new Color(192,192,192));
    xYLayout1.setWidth(400);
    xYLayout1.setHeight(139);
    button1.setLabel("发送数据到左面的applet");
    button1.addActionListener(new java.awt.event.ActionListener()
    {
      public void actionPerformed(ActionEvent e)
      {
        button1_actionPerformed(e);
      }
    });
    label1.setText("请输入你所需要发送的数据");
    this.setLayout(xYLayout1);
    this.add(button1, new XYConstraints(15, 75, 254, 32));
    this.add(textField1, new XYConstraints(15, 33, 260, 30));
    this.add(label1, new XYConstraints(16, 4, 257, 24));
    ac=this.getAppletContext();
    applet=ac.getApplet("applet2");    
  }
//Get Applet information

  public String getAppletInfo()
  {
    return "Applet Information";
  }
//Get parameter info

  public String[][] getParameterInfo()
  {
    return null;
  }

  void button1_actionPerformed(ActionEvent e)
  {
    String msg=textField1.getText();
    if(msg==null||msg.equals(""))
      return;
    TextArea textArea=(TextArea)applet.getComponent(2);
    textArea.append(msg+"\n");
  }
}