Main.java Source code

Introduction

Here is the source code for Main.java

Source

import java.awt.Container;
import java.awt.FlowLayout;

import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.UIManager;

public class Main extends JFrame {
    JComboBox<String> comboBox;

    Main() {
        String[] items = { "Item1", "Item2" };
        comboBox = new JComboBox<>(items);
        Container c = getContentPane();
        c.setLayout(new FlowLayout());
        c.add(comboBox);
        comboBox.setUI(new MyUI());
    }

    public JFrame getCurrentInstance() {
        return this;
    }

    public static void main(String[] args) {
        Main frame = new Main();
        frame.setDefaultCloseOperation(EXIT_ON_CLOSE);
        frame.setLocationRelativeTo(null);
        frame.pack();
        frame.setVisible(true);
    }

}

class MyUI extends javax.swing.plaf.basic.BasicComboBoxUI {
    private ImageIcon infoIcon = (ImageIcon) UIManager.getIcon("OptionPane.informationIcon");
    private ImageIcon warnIcon = (ImageIcon) UIManager.getIcon("OptionPane.warningIcon");

    @Override
    protected JButton createArrowButton() {
        JButton btn = new JButton();
        btn.setIcon(infoIcon);
        btn.setRolloverIcon(warnIcon);
        return btn;
    }
}