Java Swing Tutorial - Java ComboBoxModel .getSelectedItem ()


ComboBoxModel.getSelectedItem() has the following syntax.

Object getSelectedItem()


In the following code shows how to use ComboBoxModel.getSelectedItem() method.

//from w w  w .j  a  va  2  s  .  co  m
import java.awt.BorderLayout;
import java.util.ArrayList;
import java.util.Collection;

import javax.swing.AbstractListModel;
import javax.swing.ComboBoxModel;
import javax.swing.JComboBox;
import javax.swing.JFrame;

public class Main {
  public static void main(String args[]) {
    JFrame frame = new JFrame("ArrayListComboBoxModel");

    Collection<Object> col = System.getProperties().values();
    ArrayList<Object> arrayList = new ArrayList<Object>(col);
    ArrayListComboBoxModel model = new ArrayListComboBoxModel(arrayList);

    JComboBox comboBox = new JComboBox(model);

    frame.add(comboBox, BorderLayout.NORTH);
    frame.setSize(300, 225);

class ArrayListComboBoxModel extends AbstractListModel implements ComboBoxModel {
  private Object selectedItem;

  private ArrayList anArrayList;

  public ArrayListComboBoxModel(ArrayList arrayList) {
    anArrayList = arrayList;

  public Object getSelectedItem() {
    return selectedItem;

  public void setSelectedItem(Object newValue) {
    selectedItem = newValue;

  public int getSize() {
    return anArrayList.size();

  public Object getElementAt(int i) {
    return anArrayList.get(i);