February 2014
Beginner
1248 pages
62h 25m
English
Content preview from Java™ How To Program (Early Objects), Tenth Edition
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12.11 JComboBox; Using an Anonymous Inner Class for Event Handling
A combo box (sometimes called a drop-down list) enables the user to select one item from a list (Fig. 12.22). Combo boxes are implemented with class JComboBox, which extends class JComponent. JComboBox is a generic class, like the class ArrayList (Chapter 7). When you create a JComboBox, you specify the type of the objects that it manages—the JComboBox then displays a String representation of each object.
1 // Fig. 12.21: ComboBoxFrame.java 2 // JComboBox that displays a list of image names. 3 import java.awt.FlowLayout; 4 import java.awt.event.ItemListener; 5 import java.awt.event.ItemEvent; 6 import javax.swing.JFrame; 7 import ...
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