CODEWITHSUNDEEP
javaswinguser-interfacejcombobox
rzezimierz
rzezimierz

Reputation: 23

Get JComboBox items string representation

I would like to obtain String representation of all the items contained in the JComboBox's model, how to do this? 

    ListModel model = combobox.getModel();   
    for(int i = 0; i < model.getSize(); i++) 
    {
        componentTexts.add( model.getElementAt( i ).toString() );
    }

This gives me different strings than combobox items - CellRenderer decides about the every combobox item's label text?

Upvotes: 1

Views: 209

Answers (2)

camickr
camickr

Reputation: 324098

If your rendered text is different than the toString() of the Object then you need to invoke the renderer directly.

The code might be something like:

ListCellRenderer renderer = comboBox.getRenderer();

Object child = comboBox.getAccessibleContext().getAccessibleChild(0);
BasicComboPopup popup = (BasicComboPopup)child;
JList list = popup.getList();

ListModel model = combobox.getModel();   
for(int i = 0; i < model.getSize(); i++) 
{
    Object value = model.getElementAt(i);
    JLabel label = (JLabel)renderer.getListCellRendererComponent(list, value, i, false, false);
    components.add( label.getText() );
}

Upvotes: 2

cello
cello

Reputation: 5486

Basically, you can't in every case, because the CellRenderer does not return a String, but could return any JComponent it feels is appropriate to show, e.g. also an icon, an image, a color patch, or something more complex.

Still, you could try to access the combobox' CellRenderer and ask the cellRenderer for each Combobox item. This will return you a JComponent. If it is a JLabel (which it probably often is), you use the getText() method to extract the text. Something like:

if (component instance JLabel) {
    componentTexts.add ((JLabel) component).getText());
}

Upvotes: 0

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