Adding an ActionListener to a JList - swing

Question

I have a JList with an array of strings. Basically it displays a restaurant menu.
right next to the JList i have another JList which is empty. Whenever a user double clicks on a string in the first JList (where the menu is displayed) I want it to show up on the next JList which is right next to it.
how do i do that?

Answer 1

You can try
final JList list = new JList(dataModel);
MouseListener mouseListener = new MouseAdapter() {
public void mouseClicked(MouseEvent e) {
if (e.getClickCount() == 2) {
String selectedItem = (String) list.getSelectedValue();
// add selectedItem to your second list.
DefaultListModel model = (DefaultListModel) list2.getModel();
if(model == null)
{
model = new DefaultListModel();
list2.setModel(model);
}
model.addElement(selectedItem);
}
}
};
list.addMouseListener(mouseListener);

Answer 2

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.VK_ENTER){
//do what you want to do
}
}
});
I know that this is not for a double click but some people want to do it with the Enter button instead as I wanted to do.

Answer 3

I have done it already in your code in the other question?
[link] I want to add an action listener from one JList to another JList and how can a JList appear with out any text inside?
The only think you must do there is to put it into the #Bala R's if statement doing the check of number of clicks:
if (e.getClickCount() == 2) {
//your code
}
Actually you would be better to use addElement(selectedItem); method, as in the #Bala R's code instead of
add(orderList.getModel().getSize(), selectedItem); in my code. Both add the item to the end but addElement looks nicer and you do not need to retrieve the model's size.
Oi, Boro.

Answer 4

public void addActionListener(final ActionListener al) {
jList.addKeyListener(new KeyAdapter() {
public void keyPressed(KeyEvent e) {
if (e.getKeyCode() == KeyEvent.VK_ENTER) {
al.actionPerformed(new ActionEvent(e.getSource(), e.getID(), "ENTER"));
}
}
});
jList().addMouseListener(new MouseAdapter() {
public void mouseClicked(MouseEvent e) {
if (e.getClickCount() == 2) {
al.actionPerformed(new ActionEvent(e.getSource(), e.getID(), "ENTER"));
}
}
});
}