Java™ How To Program (Early Objects), Tenth Edition

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.

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 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 ...