ComboBox.java Source code

Introduction

Here is the source code for ComboBox.java

Source

import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;

import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JDialog;
import javax.swing.JLabel;

public class ComboBox extends JDialog implements ActionListener, ItemListener {
    final String[] authors = { "A", "B", "C", "D", "E", "F" };
    final String[] images = { "a.jpg", "b.jpg", "c.jpg", "d.jpg", "e.jpg", "f.jpg" };

    JLabel display = new JLabel();
    JComboBox combobox = new JComboBox(authors);
    JButton button = new JButton("Close");

    ImageIcon icon = new ImageIcon(ClassLoader.getSystemResource("a.jpg"));

    public ComboBox() {
        setLayout(new FlowLayout());
        add(display);
        combobox.setSelectedIndex(-1);
        combobox.addItemListener(this);
        add(combobox);

        button.addActionListener(this);
        add(button);

        setSize(300, 300);
        setDefaultCloseOperation(JDialog.DISPOSE_ON_CLOSE);
        setLocationRelativeTo(null);
        setVisible(true);
    }

    public static void main(String[] args) {
        new ComboBox();
    }

    public void actionPerformed(ActionEvent e) {
        System.exit(0);
    }

    public void itemStateChanged(ItemEvent e) {
        if (e.getStateChange() == ItemEvent.SELECTED) {
            JComboBox combo = (JComboBox) e.getSource();
            int index = combo.getSelectedIndex();
            display.setIcon(new ImageIcon(ClassLoader.getSystemResource(images[index])));
        }
    }
}