CODEWITHSUNDEEP
javaswingjcombobox
Suman.hassan95
Suman.hassan95

Reputation: 4005

Dynamically change JComboBox

I am fetching the data values from the database successfully. I have also stored them into a String[] array. I need to load the String array as the items of the JComboBox in response to key actionperformed. How can I reload the items of the JComboBox whenever a key is pressed as the fetched values depend on the key pressed. Rather simply, I need to dynamically refresh the JComboBox items.

Upvotes: 26

Views: 58871

Answers (3)

camickr
camickr

Reputation: 324098

DefaultComboBoxModel<String> model = new DefaultComboBoxModel<>( yourStringArray );
comboBox.setModel( model );

Upvotes: 41

Mizuki
Mizuki

Reputation: 2233

This is the demo for illustrating default combo box model

public class ComboPanel extends JPanel {

    JComboBox jcbo;
    // this is constructor
    public ComboPanel(ArrayList<String> items) {
        jcbo = new JComboBox();
        // getting exiting combo box model
        DefaultComboBoxModel model = (DefaultComboBoxModel) jcbo.getModel();
        // removing old data
        model.removeAllElements();

        for (String item : items) {
            model.addElement(item);
        }

        // setting model with new data
        jcbo.setModel(model);
        // adding combobox to panel
        this.add(jcbo);    
    }
}

I hope this will help little :)

Upvotes: 7

unholysampler
unholysampler

Reputation: 17321

You have a couple of options. You can use removeAllItems() (or one of the other remove methods) and addItem(Object anObject) to manipulate the selectable objects. Or you could implement a ComboBoxModeland allow it to serve up data from your array.

Upvotes: 7

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