import javax.swing.*;

import java.awt.BorderLayout;

public class SimpleSwingButton {
    /**
     * Create the GUI and show it.  For thread safety,
     * this method should be invoked from the
     * event-dispatching thread.
     */

    private static void createAndShowGUI() {
    	// specify system look and feel
    	try {
    		UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
        } catch (Exception e) {
            System.err.println("Using the default look and feel.");
            e.printStackTrace();
        }
        //Create and set up the window.
        JFrame frame = new JFrame("Button Demo");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        // Create button labeled "I'm a Swing Button"
        JButton PMButton = new JButton ("I'm a Swing Button!");
        PMButton.setBorder(BorderFactory.createEmptyBorder(20,20,20,20)); //T,L,B,R
        frame.getContentPane().add(PMButton);

        //Display the window.
        frame.pack();
        frame.setVisible(true);
    }

    public static void main(String[] args) {
        //Schedule a job for the event-dispatching thread:
        //creating and showing this application's GUI.
        javax.swing.SwingUtilities.invokeLater(new Runnable() {
            public void run() {
                createAndShowGUI();
            }
        });
    }
}