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Short Course
Exercises
For this exercise you design an applet that displays a List
object and a TextField object. When an item is selected from
the list, the associated string is displayed in the noneditable textfield. The
list is populated with the names of the currently recognized fonts.
Prerequisites
Skeleton Code
ListFonts.java uses an API that was superceded with the Java 2 platform, version 1.2. Use ListFonts.java for version Java 1.1, or ListFonts2.java for Java 2 platform, version 1.2. Notice the changes in the code:
// version 1.1
String fontList[] = getToolkit().getFontList();
// version 1.2
GraphicsEnvironment env =
GraphicsEnvironment.getLocalGraphicsEnvironment();
String fontList[] = env.getAvailableFontFamilyNames();
// version 1.1
list.addItem(fontList[i]);
// version 1.2
list.add(fontList[i]);
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Tasks
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1. | To receive the item events, add the applet itself as an ItemListener target. That is, the applet should implement this interface.
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2. | Define the itemStateChanged() method so that it calls getSelectedItem() to get the currently selected item and displays it in the textfield, tf, with setText().
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Where help exists, the task numbers above are linked to the step-by-step help page.
Solution Source
Demonstration
This exercise only runs within browsers that support the Java Runtime Environment 1.1 and appletviewer.
If you are using an appropriate browser, try this exercise. The output should look similar to the following:
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