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<TITLE>Listening for Changes to the Selection in a JList Component
(Java Developers Almanac Example)
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<META CONTENT="Patrick Chan" NAME="AUTHOR">
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<h3>
e784.
Listening for Changes to the Selection in a JList Component</h3>
When the set of selected items is changed, either by the user or
programmatically, a list selection event is fired.
<pre>
// Create a list
String[] items = {<font color="#0066ff"><i>"A", "B", "C", "D"</i></font>};
JList list = new JList(items);
// Register a selection listener
list.addListSelectionListener(new MyListSelectionListener());
class MyListSelectionListener implements ListSelectionListener {
// This method is called each time the user changes the set of selected items
public void valueChanged(ListSelectionEvent evt) {
// When the user release the mouse button and completes the selection,
// getValueIsAdjusting() becomes false
if (!evt.getValueIsAdjusting()) {
JList list = (JList)evt.getSource();
// Get all selected items
Object[] selected = list.getSelectedValues();
// Iterate all selected items
for (int i=0; i<selected.length; i++) {
Object sel = selected[i];
}
}
}
}
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Related Examples
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e778. <a class="eglink" href="list_List.html?l=rel">
Creating a JList Component
</a>
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e779. <a class="eglink" href="list_ListGetItem.html?l=rel">
Getting the Items in a JList Component
</a>
<br>
e780. <a class="eglink" href="list_ListAddRem.html?l=rel">
Adding and Removing an Item in a JList Component
</a>
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e781. <a class="eglink" href="list_ListGetSel.html?l=rel">
Getting the Selected Items in a JList Component
</a>
<br>
e782. <a class="eglink" href="list_ListSel.html?l=rel">
Setting the Selected Items in a JList Component
</a>
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e783. <a class="eglink" href="list_ListSelMode.html?l=rel">
Setting the Selection Mode of a JList Component
<br>
e785. <a class="eglink" href="list_ListChgEvt.html?l=rel">
Listening for Changes to the Items in a JList Component
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Actions
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JCheckBox
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JComboBox
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JDesktop and JInternalFrame
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JFrame, JWindow, JDialog
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JLabel
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JToolBar
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<a class="eglink" href="/egs/javax.swing/pkg.html?l=rel#Keystrokes%20and%20Input%20Maps">
Keystrokes and Input Maps
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<a class="eglink" href="/egs/javax.swing/pkg.html?l=rel#Layout">
Layout
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The Screen
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Tool Tips
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<a class="eglink" href="/egs/javax.swing/pkg.html?l=rel#UI%20Default%20Values">
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