Java: Swing JComboBox, is it possible to have hidden data for each item in the list?

Import java.awt. *; import java.awt.event. *; import java.util.

*; import javax.swing. *; import javax.swing.plaf.basic. *; public class ComboBoxItem extends JFrame implements ActionListener { public ComboBoxItem() { Vector model = new Vector(); model.

AddElement( new Item(1, "car" ) ); model. AddElement( new Item(2, "plane" ) ); model. AddElement( new Item(3, "train" ) ); model.

AddElement( new Item(4, "boat" ) ); model. AddElement( new Item(5, "boat aadf asfsdf a asd asd" ) ); JComboBox comboBox; // Easiest approach is to just override toString() method // of the Item class comboBox = new JComboBox( model ); comboBox. AddActionListener( this ); comboBox.

PutClientProperty("JComboBox. IsTableCellEditor", Boolean. TRUE); getContentPane().

Add(comboBox, BorderLayout. NORTH ); // Most flexible approach is to create a custom render // to diplay the Item data comboBox = new JComboBox( model ); comboBox. SetRenderer( new ItemRenderer() ); comboBox.

AddActionListener( this ); getContentPane(). Add(comboBox, BorderLayout. SOUTH ); } public void actionPerformed(ActionEvent e) { JComboBox comboBox = (JComboBox)e.getSource(); Item item = (Item)comboBox.getSelectedItem(); System.out.

Println( item.getId() + " : " + item.getDescription() ); } class ItemRenderer extends BasicComboBoxRenderer { public Component getListCellRendererComponent( JList list, Object value, int index, boolean isSelected, boolean cellHasFocus) { super. GetListCellRendererComponent(list, value, index, isSelected, cellHasFocus); if (value! = null) { Item item = (Item)value; setText( item.getDescription().toUpperCase() ); } if (index == -1) { Item item = (Item)value; setText( "" + item.getId() ); } return this; } } class Item { private int id; private String description; public Item(int id, String description) { this.Id = id; this.

Description = description; } public int getId() { return id; } public String getDescription() { return description; } public String toString() { return description; } } public static void main(String args) { JFrame frame = new ComboBoxItem(); frame. SetDefaultCloseOperation( EXIT_ON_CLOSE ); frame.pack(); frame. SetVisible( true ); } }.

– evilReiko Mar 3 at 10:05 Vector is not deprecated (at least in JDK6). Swing components use Models to store the data. The DefaultComboBoxModel uses a Vector to store the data.

If you don't like this you can always create your own Model and use whatever you want to store the data. – camickr Mar 3 at 16:10.

Create a User class which has the attributes username and id; return only username in .toString().

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