How do I add a listener to JList?

How do I add a listener to JList?

You may also want to do it with the Enter key pressed by adding a KeyListener: jlist. addKeyListener(new KeyAdapter(){ public void keyPressed(KeyEvent e){ if (e. getKeyCode() == KeyEvent.

How get values from JList?

Get selected value from JList

1. Create a class that extends JFrame and implements ActionListener interface.
2. Create an array of objects.
3. Create a new JList with the above array.
4. Create a new JButton .
5. Call getSelectedIndex to get the index of the selected item in the JList .

How do I check if a JList is selected?

boolean res = ! list. isSelectionEmpty(); The value of res would be TRUE IF we have a selected item in the JList.

How do I find the size of a JList?

We also obtain the size or the number of items in the JList components. This can be done by calling JList ‘s getModel() method which return a ListModel object. From the ListModel we can get the items size, and we can iterate the entire items of the JList component.

How do you make a JList?

This was an example on how to create a JList in a Java Desktop Application….In order to get the selected value from a JList , one should follow these steps:

1. Create a class that extends JFrame .
2. Create an array of objects. These will be the values of the JList .
3. Create a new JList with the above array.

How do you fill a JList in Java?

4 Answers

1. create a ListModel which wrapps your java.util.List (e.g. by extending AbstractListModel)
2. configure JList to use this model.
3. create and configure a renderer to format/ display the Objects in your list as needed.

Why is ActionListener an interface?

Interface ActionListener The listener interface for receiving action events. The class that is interested in processing an action event implements this interface, and the object created with that class is registered with a component, using the component’s addActionListener method.

Which of the following can register ActionListener?

An ActionListener can be used by the implements keyword to the class definition. It can also be used separately from the class by creating a new class that implements it.

How many methods are there in ActionListener?

one method
The ActionListener interface is found in java. awt. event package. It has only one method: actionPerformed().