import javax.swing.*;

import java.awt.Dimension;

import java.awt.event.*;

// There are many different layout managers

public class BasicJFrameWithLayouts implements ActionListener{

JFrame frame;

JPanel myPanel;

JLabel label;

JButton button;

public BasicJFrameWithLayouts () {

frame = new JFrame ("Basic JFrame With Layout Example");

frame.setPreferredSize(new Dimension(200, 250));

frame.setLocation(200, 200);

myPanel = new JPanel ();

myPanel.setLayout (new BoxLayout (myPanel, BoxLayout.Y_AXIS));

myPanel.setBorder (BorderFactory.createEmptyBorder (20,20,20,20));

label = new JLabel ("Hello World!");

label.setAlignmentX (JLabel.CENTER_ALIGNMENT);

label.setBorder (BorderFactory.createEmptyBorder (20,50,20,50));

button = new JButton ("Hide");

button.setAlignmentX (JButton.CENTER_ALIGNMENT);

button.setActionCommand ("Hide");

button.addActionListener(this);

myPanel.add (label);

myPanel.add (button);

frame.add (myPanel);

frame.pack ();

frame.setVisible (true);

}

public void actionPerformed (ActionEvent event) {

String eventName = event.getActionCommand();

if (eventName.equals ("Hide")) {

label.setText("");

button.setText("Show");

button.setActionCommand ("Show");

}

else {

label.setText ("Hello, World!");

button.setText ("Hide");

button.setActionCommand ("Hide");

}

}

public static void main (String [] args){

new BasicJFrameWithLayouts ();

}

}