Set Margin for JButton in Java

import java.awt.Insets;
//from  w  ww .j  a  va2  s  . c o m
import javax.swing.JButton;
import javax.swing.JFrame;

public class Main extends JFrame {

  public Main() {
    setSize(300, 150);
    setDefaultCloseOperation(EXIT_ON_CLOSE);

    JButton button = new JButton("java2s.com");
    button.setMargin(new Insets(20, 20, 20, 20));
    add(button);
    setVisible(true);
  }

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