goodeveningapplet.java

金旭亮的java教案

package firstapplet;

import java.awt.*;
import java.awt.event.*;
import java.applet.*;
import javax.swing.UIManager;


/**
 * <p>Title: </p>
 * <p>Description: </p>
 * <p>Copyright: Copyright (c) 2004</p>
 * <p>Company: </p>
 * @author not attributable
 * @version 1.0
 */

public class GoodEveningApplet extends Applet {
  private boolean isStandalone = false;
  BorderLayout borderLayout1 = new BorderLayout();
  Panel upper = new Panel();
  Panel lower = new Panel();
  CardLayout cardLayout1 = new CardLayout();
  Panel panel1 = new Panel();
  Panel panel2 = new Panel();
  Label label1 = new Label();
  BorderLayout borderLayout2 = new BorderLayout();
  BorderLayout borderLayout3 = new BorderLayout();
  Label label2 = new Label();
  Choice choice1 = new Choice();
  Label label3 = new Label();
  //Get a parameter value
  public String getParameter(String key, String def) {
    return isStandalone ? System.getProperty(key, def) :
      (getParameter(key) != null ? getParameter(key) : def);
  }

  //Construct the applet
  public GoodEveningApplet() {
  }
  //Initialize the applet
  public void init() {
    try {
      choice1.addItem("English");
    choice1.addItem("Chinese");

      jbInit();
    }
    catch(Exception e) {
      e.printStackTrace();
    }
  }
  //Component initialization
  private void jbInit() throws Exception {
    this.setLayout(borderLayout1);
    upper.setBackground(Color.orange);
    lower.setBackground(Color.magenta);
    lower.setForeground(Color.black);
    lower.setLayout(cardLayout1);
    panel2.setBackground(UIManager.getColor("ToolTip.background"));
    panel2.setForeground(Color.black);
    panel2.setLayout(borderLayout3);
    panel1.setBackground(Color.cyan);
    panel1.setForeground(Color.black);
    panel1.setLayout(borderLayout2);
    label1.setFont(new java.awt.Font("Dialog", 1, 30));
    label1.setText("         Good Evening");
    label2.setFont(new java.awt.Font("Dialog", 1, 30));
    label2.setText("               晚上好");
    label3.setFont(new java.awt.Font("Dialog", 0, 15));
    label3.setText("Select a language");
    choice1.addItemListener(new GoodEveningApplet_choice1_itemAdapter(this));
    this.add(upper,  BorderLayout.NORTH);
    upper.add(label3, null);
    upper.add(choice1, null);
    this.add(lower, BorderLayout.CENTER);
    lower.add(panel1, "panel1");
    panel1.add(label1,  BorderLayout.CENTER);
    lower.add(panel2,  "panel2");
    panel2.add(label2, BorderLayout.CENTER);
  }
  //Start the applet
  public void start() {
  }
  //Stop the applet
  public void stop() {
  }
  //Destroy the applet
  public void destroy() {
  }
  //Get Applet information
  public String getAppletInfo() {
    return "Applet Information";
  }
  //Get parameter info
  public String[][] getParameterInfo() {
    return null;
  }

  void choice1_itemStateChanged(ItemEvent e) {
    if ("English".equals(choice1.getSelectedItem())){
          cardLayout1.show(lower, "panel1");
        }
        else if ("Chinese".equals(choice1.getSelectedItem())){
          cardLayout1.show(lower, "panel2");
        }

  }
}

class GoodEveningApplet_choice1_itemAdapter implements java.awt.event.ItemListener {
  GoodEveningApplet adaptee;

  GoodEveningApplet_choice1_itemAdapter(GoodEveningApplet adaptee) {
    this.adaptee = adaptee;
  }
  public void itemStateChanged(ItemEvent e) {
    adaptee.choice1_itemStateChanged(e);
  }
}