CODEWITHSUNDEEP
javaswingjcombobox
Maarten Meeusen
Maarten Meeusen

Reputation: 492

Is there another way to remove all items of a JComboBox then removeAllItems()?

Is there another way to remove all items of a JComboBox then removeAllItems()? I use 2 JComboBoxes in mij app and when you select an item from the first combobox the related items should then be shown in the second combobox. When I do this, the items just keep appending after the ones that were already there. When I then first try to clear the combobox by using removeAllItems(), the second combobox is empty and stays empty whenever I change the first combobox... The first combobox keeps all its values... Does anyone see my problem?

festival is the JComboBox:

private JComboBox festival;
private JComboBox zone;

...

public void fillFestivalList(){
    festival.removeAllItems();
    List festivals = OP.fillFestivalList();

    for(Object fest: festivals)
        festival.addItem(fest.toString());
}

public void fillZoneList(String festival){
    zone.removeAllItems();
    List zones = OP.fillZoneList(festival);

    for(Object zoneItem: zones)
        zone.addItem(zoneItem.toString());
}

Upvotes: 2

Views: 7841

Answers (2)

Deepak Odedara
Deepak Odedara

Reputation: 491

You can also Remove all the items in this way , but better to Give JCombobox a new DefaultComboBoxModel like the way @Hovercraft Full Of Eels said 

 int itemCount = combo.getItemCount();

        for(int i=0;i<itemCount;i++){
            combo.removeItemAt(0);
         }

Upvotes: 2

Hovercraft Full Of Eels
Hovercraft Full Of Eels

Reputation: 285430

Regarding,

Is there another way to remove all items of a JComboBox then removeAllItems()?

Simply give the JComboBox a new model.

I would create a new DefaultComboBoxModel<T>, fill it with the newest entries, and then call setModel(...) on my JComboBox, passing in the new model when desired.

Upvotes: 4

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