What is JCheckBox in Java?
The JCheckBox class is used to create a checkbox. It is used to turn an option on (true) or off (false). Clicking on a CheckBox changes its state from “on” to “off” or from “off” to “on “.
Which of the following is the correct constructor for JComboBox?
Commonly used Constructors:
| Constructor | Description |
|---|---|
| JComboBox() | Creates a JComboBox with a default data model. |
| JComboBox(Object[] items) | Creates a JComboBox that contains the elements in the specified array. |
| JComboBox(Vector items) | Creates a JComboBox that contains the elements in the specified Vector. |
Which method can a program use to set the selected choice in a JComboBox?
Which method can aprogram use to set the selected choice in a JComboBox? The selection can only be set through the GUI by the user.
What is DefaultComboBoxModel?
Description. DefaultComboBoxModel() Constructs an empty DefaultComboBoxModel object. DefaultComboBoxModel(E[] items) Constructs a DefaultComboBoxModel object initialized with an array of objects.
What is the use of jcombobox in Java?
JComboBox belongs to the Java Swing package. It extends the JComponent class. JComboBox is represented by a popup menu that contains the list of elements and the user could select an option or element from that list. It can be editable or not depending upon the need and the programmer.
What is the difference between jcombobox (e[ i] i) and jcombobox (vector items)?
JComboBox (E [ ] i) : creates a new JComboBox with items from specified array. JComboBox (Vector items) : creates a new JComboBox with items from the specified vector Attention reader! Don’t stop learning now.
What is a non-editable jcombobox?
A non editable JComboBox displays the selected item in the field, but the selection cannot be modified. aFlag – a boolean value, where true indicates that the field is editable
What is setmaximumrowcount in jcombobox?
setMaximumRowCount (int count): sets the maximum number of rows the JComboBox displays. setEnabled (boolean b): enables the combo box so that items can be selected. removeItem (Object anObject) : removes an item from the item list. removeAllItems (): removes all items from the item list.