What is a JComboBox?
JComboBox is a part of Java Swing package. JComboBox inherits JComponent class . JComboBox shows a popup menu that shows a list and the user can select a option from that specified list . JComboBox can be editable or read- only depending on the choice of the programmer .
Which listener is implemented for JComboBox?
Adds a PopupMenu listener which will listen to notification messages from the popup portion of the combo box. Initializes the editor with the specified item. Sets the properties on this combobox to match those in the specified Action . This method is public as an implementation side effect.
What is the difference between JComboBox and JList?
A JComboBox is a component that displays a drop-down list and gives users options that we can select one and only one item at a time whereas a JList shows multiple items (rows) to the user and also gives an option to let the user select multiple items.
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. |
What is JSpinner in Java?
public class JSpinner extends JComponent implements Accessible. A single line input field that lets the user select a number or an object value from an ordered sequence. Spinners typically provide a pair of tiny arrow buttons for stepping through the elements of the sequence.
What is class Mean in Java?
In object-oriented programming, a class is a basic building block. It can be defined as template that describes the data and behaviour associated with the class instantiation.
What are the different uses of JSpinner?
Gets or sets the spinner’s editor, which is often an object of type JSpinner. DefaultEditor . Called by the JSpinner constructors to create the spinner’s editor….The Spinner API.
| Class or Interface | Purpose |
|---|---|
| JSpinner | A single-line input field that allows the user to select a number or object value from an ordered sequence. |