import javax.swing.*;

import java.awt.event.*;

public class JavaLesson24 extends JFrame{

JComboBox favoriteShows;

JButton button1;

String infoOnComponent = "";

public static void main(String[] args){

new JavaLesson24();

}

public JavaLesson24(){

this.setSize(400,400);

this.setLocationRelativeTo(null);

this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

this.setTitle("My Fourth Frame");

JPanel thePanel = new JPanel();

// Create an array that will be added to the combo box

String[] shows = {"Breaking Bad", "Life on Mars", "Doctor Who"};

// Create a combo box and add the array of shows

favoriteShows = new JComboBox(shows);

// Add an item to the combo box

favoriteShows.addItem("Pushing Daisies");

thePanel.add(favoriteShows);

// Create a button

button1 = new JButton("Get Answer");

ListenForButton lForButton = new ListenForButton();

button1.addActionListener(lForButton);

thePanel.add(button1);

this.add(thePanel);

this.setVisible(true);

// Add an item to a combo box at index 1

favoriteShows.insertItemAt("Dexter", 1);

// Only show 3 items at a time

favoriteShows.setMaximumRowCount(3);

// Remove the item named Dexter

//favoriteShows.removeItem("Dexter");

// Remove the item at index 1

//favoriteShows.removeItemAt(1);

// Remove all items

// favoriteShows.removeAllItems();

}

private class ListenForButton implements ActionListener{

public void actionPerformed(ActionEvent e){

if(e.getSource() == button1){

favoriteShows.setEditable(true);

// Get item at index 0

infoOnComponent = "Item at 0: " + favoriteShows.getItemAt(0) + "\n";

// Get the number of items in the combo box

infoOnComponent += "Num of Shows: " + favoriteShows.getItemCount() + "\n";

// Get the index for the selected item

infoOnComponent += "Selected ID: " + favoriteShows.getSelectedIndex() + "\n";

// Get the value for the selected item

infoOnComponent += "Selected Show: " + favoriteShows.getSelectedItem() + "\n";

// Find out if the values in the combo box are editable

infoOnComponent += "Combo Box Editable: " + favoriteShows.isEditable() + "\n";

JOptionPane.showMessageDialog(JavaLesson24.this, infoOnComponent, "Information", JOptionPane.INFORMATION_MESSAGE);

infoOnComponent = "";

}

}

}

}