import javax.swing.*;
import javax.swing.border.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;

public class JFrameJButtonJLabelJTextField1 extends JFrame implements ActionListener, KeyListener
{
	private static final int WIDTH = 500, HEIGHT = 250;
	private static final Font STANDARD_FONT = new Font("Arial", Font.BOLD, 24);
	private static final Color DARKGREEN = new Color(0, 140, 0);

	// Objects that need to be referenced from outside the constructor
	//  must be defined here (so that they are global to the class)
	private JButton button2;
	private JLabel label2, label3, label4;
	private JTextField textInput;

	public static void main(String[] args)
	{
		new JFrameJButtonJLabelJTextField1();
	}

	// Constructor
	public JFrameJButtonJLabelJTextField1()
	{
		// Note that it is NOT necessary to explicitly create a 'JFrame' object
		//  here, since extending the 'JFrame' class does that automatically

		// Allow objects to be placed anywhere on the JFrame
		setLayout(null);

		// Allow the JFrame to be closed via the "X"
		setDefaultCloseOperation(EXIT_ON_CLOSE);

		// Set the JFrame size, title, and background color
		setSize(WIDTH, HEIGHT);
		setTitle("Demo #1:  JFrame & JButtons & JLabels & JTextField");
		getContentPane().setBackground(Color.BLACK);

		// Position the JFrame in the center of the screen
		setLocationRelativeTo(null);

		// Don't let the JFrame be resized
		setResizable(false);

		// Create and set up a JLabel
		JLabel label1 = new JLabel();
		label1.setSize(250, 30);
		label1.setLocation(10, 10);
		label1.setFont(STANDARD_FONT);
		label1.setText("Click this button --->");
		label1.setOpaque(true);
		label1.setBackground(Color.BLACK);
		label1.setForeground(Color.WHITE);
		label1.setVisible(true);

		// Create and set up a JButton
		JButton button1 = new JButton("Click Me!");
		button1.setFont(new Font("Arial", Font.BOLD, 28));
		button1.setForeground(Color.BLUE);
		button1.setSize(160, 30);
		button1.setLocation(260, 10);
		button1.setFocusable(false); // Don't let the button be pressed via ENTER or SPACE
		button1.setVisible(true);

		// Create and set up a second JLabel
		label2 = new JLabel();
		label2.setSize(180, 30);
		label2.setLocation(310, 70);
		label2.setFont(new Font("Arial", Font.BOLD, 14));
		label2.setText("<--- Now Type Something");
		label2.setOpaque(true);
		label2.setBackground(Color.BLACK);
		label2.setForeground(Color.RED);
		label2.setVisible(false); // Make this label initially hidden

		// Create and set up a JTextField
		textInput = new JTextField(20);
		textInput.setSize(150, 25);
		textInput.setLocation(145, 70);
		textInput.setFont(new Font("Arial", Font.BOLD, 16));
		textInput.setBackground(Color.WHITE);
		textInput.setForeground(Color.BLACK);
		textInput.setHorizontalAlignment(JTextField.LEFT);
		textInput.setVisible(false); // Make this textfield initially hidden
		textInput.addKeyListener(this); // Allow this textfield to respond to keypresses

		// Create and set up a second JButton
		button2 = new JButton("Click Here When Done Typing");
		button2.setFont(new Font("Arial", Font.BOLD, 15));
		button2.setForeground(DARKGREEN);
		button2.setSize(250, 30);
		button2.setLocation(10, 125);
		button2.setFocusable(false); // Don't let the button be pressed via ENTER or SPACE
		button2.setVisible(false);

		// Create and set up a third JLabel
		label3 = new JLabel();
		label3.setSize(130, 30);
		label3.setLocation(10, 186);
		label3.setFont(STANDARD_FONT);
		label3.setText("You Typed:");
		label3.setOpaque(true);
		label3.setBackground(Color.BLACK);
		label3.setForeground(Color.ORANGE);
		label3.setVisible(false); // Make this label initially hidden

		// Create and set up a fourth JLabel
		label4 = new JLabel();
		label4.setSize(160, 25);
		label4.setLocation(155, 190);
		label4.setFont(new Font("Arial", Font.PLAIN, 12));
		label4.setHorizontalAlignment(JLabel.CENTER);
		label4.setText("blah blah");
		label4.setOpaque(true);
		label4.setBorder(LineBorder.createGrayLineBorder());
		label4.setBackground(Color.WHITE);
		label4.setForeground(Color.BLACK);
		label4.setVisible(false); // Make this label initially hidden

		// Create and set up a third JButton
		JButton button3 = new JButton("Quit Program");
		button3.setFont(new Font("Arial", Font.BOLD, 18));
		button3.setForeground(Color.RED);
		button3.setSize(150, 35);
		button3.setLocation(334, 180);
		button3.setFocusable(true); // Allow this button to have the focus
		button3.setVisible(true);

		// Allow the buttons to respond to being pressed
		button1.addActionListener(this);
		button2.addActionListener(this);
		button3.addActionListener(this);

		// Add the JButtons, JLabels, and JTextField to the JFrame
		add(button1);
		add(button2);
		add(button3);
		add(label1);
		add(label2);
		add(label3);
		add(label4);
		add(textInput);

		// Make the JFrame (and everything on it) visible
		setVisible(true);
	}

	public void actionPerformed(ActionEvent e)
	{
		// See if the TOP button was clicked
		if (e.getActionCommand().equals("Click Me!"))
		{
			label2.setVisible(true);
			textInput.setVisible(true);
			textInput.requestFocus(); // Put the cursor in the textfield
		}

		// See if the MIDDLE button was clicked
		if (e.getActionCommand().equals("Click Here When Done Typing"))
		{
			label3.setVisible(true);

			label4.setText(textInput.getText());
			label4.setVisible(true);
		}

		// See if the EXIT button was clicked
		if (e.getActionCommand().equals("Quit Program"))
			System.exit(0);
	}

	// Since 'KeyListener' is implemented, this method must exist to avoid errors
	public void keyPressed(KeyEvent e)
	{
	}

	public void keyReleased(KeyEvent e)
	{
		// Since the 'keyPressed' method receives the keypress before the textfield is
		//  updated, it is necessary to put this code here (in the 'keyReleased' method)
		if (textInput.getText().length() > 0)
			button2.setVisible(true);
	}

	// Since 'KeyListener' is implemented, this method must exist to avoid errors
	public void keyTyped(KeyEvent e)
	{
	}
}