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<TITLE>Setting the Number of Visible Items in the Menu of a JComboBox Component (Java Developers Almanac Example)
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<h3>e764. Setting the Number of Visible Items in the Menu of a JComboBox Component</h3>
By default, the menu of a combobox only shows eight items. If there
are more items in the menu, a scrollbar is automatically created. To
change the default of eight, use <code>JComboBox.setMaximumRowCount()</code>.
<pre> // Create a read-only combobox with lots of items
String[] items = new String[50];
for (int i=0; i<items.length; i++) {
items[i] = "" + Math.random();
}
JComboBox cb = new JComboBox(items);
// Retrieve the current max visible rows
int maxVisibleRows = cb.getMaximumRowCount();
// Change the current max visible rows
maxVisibleRows = <font color="#0066ff"><i>20</i></font>;
cb.setMaximumRowCount(maxVisibleRows);
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<b>Related Examples</b></font></td>
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e756. <a class="eglink" href="combobox_CbRead.html?l=rel">
Creating a JComboBox Component
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e757. <a class="eglink" href="combobox_CbGetCur.html?l=rel">
Getting and Setting the Selected Item in a JComboBox Component
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e758. <a class="eglink" href="combobox_CbGetItems.html?l=rel">
Getting the Items in a JComboBox Component
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e759. <a class="eglink" href="combobox_CbAddItems.html?l=rel">
Adding and Removing an Item in a JComboBox Component
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e760. <a class="eglink" href="combobox_CbMultiKey.html?l=rel">
Selecting an Item in a JComboBox Component with Multiple Keystrokes
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e761. <a class="eglink" href="combobox_CbIsMenu.html?l=rel">
Determining If the Menu of a JComboBox Component Is Visible
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e762. <a class="eglink" href="combobox_CbKeyPopup.html?l=rel">
Displaying the Menu in a JComboBox Component Using a Keystroke
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e763. <a class="eglink" href="combobox_CbIsKeySel.html?l=rel">
Displaying the Menu in a JComboBox Component Using a Keystroke If the Selected Item Is Not Unique
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e765. <a class="eglink" href="combobox_CbItemEvt.html?l=rel">
Listening for Changes to the Selected Item in a JComboBox Component
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e766. <a class="eglink" href="combobox_CbActionEvt.html?l=rel">
Listening for Action Events from a JComboBox Component
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e767. <a class="eglink" href="combobox_CbMenuEvt.html?l=rel">
Determining When the Menu of a JComboBox Component Is Displayed
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Actions
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JCheckBox
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JFrame, JWindow, JDialog
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JProgressBar
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JRadioButton
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JScrollPane
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JToolBar
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Keystrokes and Input Maps
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Progress Monitor
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Tool Tips
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UI Default Values
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