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e764. Setting the Number of Visible Items in the Menu of a JComboBox Component
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 JComboBox.setMaximumRowCount() .
// 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 = 20;
cb.setMaximumRowCount(maxVisibleRows);
e756.
Creating a JComboBox Component
e757.
Getting and Setting the Selected Item in 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
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
© 2002 Addison-Wesley.
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