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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;
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);
}
}
public class ArrayListComboBoxModelDemo {
public static void main(String args[]) {
JFrame frame = new JFrame("ArrayListComboBoxModel");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
ArrayList<Object> arrayList = new ArrayList<Object>();
arrayList.add("A");
arrayList.add("B");
arrayList.add("C");
ArrayListComboBoxModel model = new ArrayListComboBoxModel(arrayList);
JComboBox comboBox = new JComboBox(model);
frame.add(comboBox, BorderLayout.NORTH);
frame.setSize(300, 225);
frame.setVisible(true);
}
}
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