Main.java Source code

Introduction

Here is the source code for Main.java

Source

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

import javax.swing.ButtonGroup;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JRadioButton;
import javax.swing.event.PopupMenuEvent;
import javax.swing.event.PopupMenuListener;

public class Main extends JFrame {
    JRadioButton rOne = new JRadioButton("One"), rTwo = new JRadioButton("Two");
    ButtonGroup group;
    JComboBox combo;
    JLabel label;

    public Main() {
        rOne.addActionListener(new ROneAction());
        rTwo.addActionListener(new RTwoAction());
        group = new ButtonGroup();
        group.add(rOne);
        group.add(rTwo);

        combo = new JComboBox();
        combo.addItem("No Values");
        combo.addPopupMenuListener(new PopupMenuListener() {
            public void popupMenuCanceled(PopupMenuEvent evt) {
            }

            public void popupMenuWillBecomeInvisible(PopupMenuEvent evt) {
                jComboBox1PopupMenuWillBecomeInvisible(evt);
            }

            public void popupMenuWillBecomeVisible(PopupMenuEvent evt) {
            }
        });

        label = new JLabel("labelLabel");

        this.setLayout(new FlowLayout());
        this.add(rOne);
        this.add(rTwo);
        this.add(combo);
        this.add(label);
        this.pack();
        this.setVisible(true);
        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    }

    private class ROneAction implements ActionListener {
        public void actionPerformed(ActionEvent ae) {
            combo.removeAllItems();
            combo.addItem("One");
        }
    }

    private class RTwoAction implements ActionListener {
        public void actionPerformed(ActionEvent ae) {
            combo.removeAllItems();
            combo.addItem("Two");
        }
    }

    private void jComboBox1PopupMenuWillBecomeInvisible(javax.swing.event.PopupMenuEvent evt) {
        label.setText("selected");
    }

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