public class NonNullableComboBoxModel
extends javax.swing.DefaultComboBoxModel
NonNullableComboBoxModel
is a simple class for ensuring that a JComboBox
will always have an item selected (if that we start with a non-empty list.) This will prevent the user from Control-clicking in the list to unselect the selected item in the JComboBox.
This can be used to guarantee that there is always a selected item in the combo box model. If the user attempts to unselect an item, the previously selected item will remain selected. The selection will be empty only if the combo box model is empty.
Constructor and Description |
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NonNullableComboBoxModel()
Constructs an empty combo box model.
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NonNullableComboBoxModel(java.lang.Object[] items)
Constructs a new
NonNullableComboBoxModel with the specified list of objects. |
Modifier and Type | Method and Description |
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void |
setSelectedItem(java.lang.Object anObject)
Sets the selected item of the combo box model to the specified object.
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addElement, getElementAt, getIndexOf, getSelectedItem, getSize, insertElementAt, removeAllElements, removeElement, removeElementAt
addListDataListener, fireContentsChanged, fireIntervalAdded, fireIntervalRemoved, getListDataListeners, getListeners, removeListDataListener
public NonNullableComboBoxModel()
public NonNullableComboBoxModel(java.lang.Object[] items)
NonNullableComboBoxModel
with the specified list of objects.items
- an array of Objects to use for the modelpublic void setSelectedItem(java.lang.Object anObject)
setSelectedItem
in interface javax.swing.ComboBoxModel
setSelectedItem
in class javax.swing.DefaultComboBoxModel
anObject
- the object to set as the selected item