The Java Developers Almanac 1.4


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Home > List of Packages > javax.swing  [141 examples] > JComboBox  [12 examples]

e757. Getting and Setting the Selected Item in a JComboBox Component

    // Create a read-only combobox
    String[] items = {"item1", "item2"};
    JComboBox cb = new JComboBox(items);
    
    // Get current value
    Object obj = cb.getSelectedItem(); // item1
    
    // Set a new value
    cb.setSelectedItem("item2");
    obj = cb.getSelectedItem();        // item2
    
    // If the new value is not in the list of valid items, the call is ignored
    cb.setSelectedItem("item3");
    obj = cb.getSelectedItem();        // item2
    
    // However, if the combobox is editable, the new value can be any value
    cb.setEditable(true);
    cb.setSelectedItem("item3");
    obj = cb.getSelectedItem();        // item3

 Related Examples
e756. Creating a JComboBox Component
e758. Getting the Items in a JComboBox Component
e759. Adding and Removing an Item in a JComboBox Component
e760. Selecting an Item in a JComboBox Component with Multiple Keystrokes
e761. Determining If the Menu of a JComboBox Component Is Visible
e762. Displaying the Menu in a JComboBox Component Using a Keystroke
e763. Displaying the Menu in a JComboBox Component Using a Keystroke If the Selected Item Is Not Unique
e764. Setting the Number of Visible Items in the Menu of a JComboBox Component
e765. Listening for Changes to the Selected Item in a JComboBox Component
e766. Listening for Action Events from a JComboBox Component
e767. Determining When the Menu of a JComboBox Component Is Displayed

See also: Actions    JButton    JCheckBox    JDesktop and JInternalFrame    JFrame, JWindow, JDialog    JLabel    JList    JProgressBar    JRadioButton    JScrollPane    JSlider    JSpinner    JSplitPane    JTabbedPane    JToolBar    Keystrokes and Input Maps    Layout    Look and Feel    Menus    Progress Monitor    The Screen    Tool Tips    UI Default Values   


© 2002 Addison-Wesley.