Java by API/javax.swing/ComboBoxModel

extends AbstractListModel implements ComboBoxModel

   <source lang="java">

import java.awt.BorderLayout; import java.util.ArrayList; import java.util.Collection; import javax.swing.AbstractListModel; import javax.swing.ruboBoxModel; import javax.swing.JComboBox; import javax.swing.JFrame; public class MainClass {

 public static void main(String args[]) {
   JFrame frame = new JFrame("ArrayListComboBoxModel");
   frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
   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);
   frame.setVisible(true);
 }

} 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);
 }

}

      </source>