Main.java Source code

Introduction

Here is the source code for Main.java

Source

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JComboBox;

public class Main {
    public static void main(String[] argv) throws Exception {
        String[] items = { "item1", "item2" };
        JComboBox cb = new JComboBox(items);
        cb.setEditable(true);

        // Create and register listener
        MyActionListener actionListener = new MyActionListener();
        cb.addActionListener(actionListener);
    }
}

class MyActionListener implements ActionListener {
    Object oldItem;

    public void actionPerformed(ActionEvent evt) {
        JComboBox cb = (JComboBox) evt.getSource();
        Object newItem = cb.getSelectedItem();

        boolean same = newItem.equals(oldItem);
        oldItem = newItem;

        if ("comboBoxEdited".equals(evt.getActionCommand())) {
            // User has typed in a string; only possible with an editable combobox
        } else if ("comboBoxChanged".equals(evt.getActionCommand())) {
            // User has selected an item; it may be the same item
        }
    }
}