populate value from mongo db in java

hi i have gui which get value from mongo db how can i populate value this is my gui
something like this
hi how can I search value from database using combobox for example I enter username and return the detail of that username something like this
import javax.swing.*;
import org.jdesktop.swingx.autocomplete.AutoCompleteDecorator;//where do I get this am getting error is not recognise
import java.awt.*;

public class Demo {

    JFrame frame = new JFrame("");
    AutoCompleteDecorator decorator;
    JComboBox combobox;

    public Demo() {
        combobox = new JComboBox(new Object[]{"","Ester", "Jordi",
            "Jordina", "Jorge", "Sergi"});//I what to searc from database
        AutoCompleteDecorator.decorate(combobox);
        frame.setSize(400,400);
        frame.setLocationRelativeTo(null);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setLayout(new FlowLayout());

        frame.add(combobox);
        frame.setVisible(true);
    }

    public static void main(String[] args) {
        Demo d = new Demo();
    }
}

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