Using drop-down lists

  

// : c14:ComboBoxes.java
// Using drop-down lists.
// <applet code=ComboBoxes width=200 height=125></applet>
// From 'Thinking in Java, 3rd ed.' (c) Bruce Eckel 2002
// www.BruceEckel.com. See copyright notice in CopyRight.txt.

import java.awt.Container;
import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JApplet;
import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JTextField;

public class ComboBoxes extends JApplet {
  private String[] description = { "Ebullient", "Obtuse", "Recalcitrant",
      "Brilliant", "Somnescent", "Timorous", "Florid", "Putrescent" };

  private JTextField t = new JTextField(15);

  private JComboBox c = new JComboBox();

  private JButton b = new JButton("Add items");

  private int count = 0;

  public void init() {
    for (int i = 0; i < 4; i++)
      c.addItem(description[count++]);
    t.setEditable(false);
    b.addActionListener(new ActionListener() {
      public void actionPerformed(ActionEvent e) {
        if (count < description.length)
          c.addItem(description[count++]);
      }
    });
    c.addActionListener(new ActionListener() {
      public void actionPerformed(ActionEvent e) {
        t.setText("index: " + c.getSelectedIndex() + "   "
            + ((JComboBox) e.getSource()).getSelectedItem());
      }
    });
    Container cp = getContentPane();
    cp.setLayout(new FlowLayout());
    cp.add(t);
    cp.add(c);
    cp.add(b);
  }

  public static void main(String[] args) {
    run(new ComboBoxes(), 200, 125);
  }

  public static void run(JApplet applet, int width, int height) {
    JFrame frame = new JFrame();
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.getContentPane().add(applet);
    frame.setSize(width, height);
    applet.init();
    applet.start();
    frame.setVisible(true);
  }
} ///:~

Related examples in the same category

1.	Combobox combines a button or editable field and a drop-down list.
2.	A fancy example of JComboBox with a custom renderer and editor
3.	Editable ComboBox
4.	Create a simple combobox
5.	Font Chooser ComboBox
6.	Color combobox renderer
7.	Select the combobox by choose the nearby label
8.	ComoboBox loads and saves items automatically from a file
9.	Sharing a Model between a JList and JComboBox
10.	ComboBox Demo 2
11.	Custom ComboBox with Image
12.	ComboBox Demo
13.	List: Shared Data Sample
14.	Selecting Combo Sample
15.	MultiKey Combo
16.	PopupCombo Sample
17.	Dual Sample: JList and ComboBox
18.	ComboBox Sample
19.	Color ComboBox: ComboBoxEditor Demo
20.	Determining When the Menu of a JComboBox Component Is Displayed
21.	Listening for Action Events from a JComboBox Component
22.	Listening for Changes to the Selected Item in a JComboBox Component
23.	Setting the Number of Visible Items in the Menu of a JComboBox Component
24.	Displaying the Menu in a JComboBox Component Using a Keystroke If the Selected Item Is Not Unique
25.	Displaying the Menu in a JComboBox Component Using a Keystroke
26.	Determining If the Menu of a JComboBox Component Is Visible
27.	Selecting an Item in a JComboBox Component with Multiple Keystrokes
28.	Adding and Removing an Item in a JComboBox Component
29.	Add an item after the first item
30.	Add an item to the end of the list
31.	Remove first item
32.	Remove the last item
33.	Remove all items
34.	Getting the Items in a JComboBox Component
35.	Getting and Setting the Selected Item in a JComboBox Component
36.	If the combobox is editable, the new value can be any value
37.	Creating a read-only and editable JComboBox Component
38.	ArrayListComboBoxModel Demo
39.	A frame with a sample text label and a combo box for selecting font faces

Using drop-down lists : ComboBox « Swing JFC « Java

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