public class WebSitesApplet
1: // WebSitesApplet.java
2: // Applet to display a set of buttons on the screen that
3: // allow the user to access a selection of web sites.
5: import java.awt.*;
6: import java.awt.event.*;
7: import java.applet.*;
8: import java.net.*;
10: public class WebSitesApplet
11: extends Applet
12: implements ActionListener
13: {
14: // Initialize an array with the names of the Web sites
15: String[] webSiteNames =
16: {"Oxford Brookes University",
17: "Oxford Computing Laboratory",
18: "Jones & Bartlett",
19: "Java Development",
20: "Windows 95 utilities"};
22: // Initialize an array with the corresponding URLs of those Web sites
23: String[] webURLs =
24: {"http://www.brookes.ac.uk",
25: "http://www.comlab.ox.ac.uk",
26: "http://www.jbpub.com",
27: "http://java.sun.com",
28: "http://www.windows95.com"};
30: // Array of buttons that will denote the different Web sites
31: Button[] button = new Button[webSiteNames.length];
33: // Override method init to display the group of buttons
34: public void init()
35: {
36: setLayout(null);
37: setBackground(Color.yellow);
38: for (int index=0; index!=webSiteNames.length; index++)
39: {
40: button[index] = new Button(webSiteNames[index]);
41: button[index].setLocation(10, 25*index);
42: button[index].setSize(200, 20);
43: button[index].setBackground(Color.cyan);
44: button[index].addActionListener(this);
45: add(button[index]);
46: }
47: }
49: // Implement the actionPerformed method
50: // in the ActionListener interface
51: public void actionPerformed(ActionEvent event)
52: {
53: // Find the name of the button that was pressed
54: Object source = event.getActionCommand();
55: for (int index=0; index != webSiteNames.length; index++)
56: {
57: // Inspect each web site name in the array of Web site names
58: if (source.equals(webSiteNames[index]))
59: {
60: // Display the relevant page from the Web site
61: // if and when a match is found
62: try
63: {
64: URL site = new URL(webURLs[index]);
65: getAppletContext().showDocument(site);
66: }
67: catch (MalformedURLException m)
68: {
69: System.exit(1);
70: }
71: return;
72: }
73: }
74: }
75: }