Change font for JButton in Java

import java.awt.Font;
/*from   w  w  w.  ja  va  2  s . c  om*/
import javax.swing.JButton;
import javax.swing.JFrame;

public class Main extends JFrame {
  JButton b = new JButton("Add");
  public Main() {
    setSize(300, 150);
    setDefaultCloseOperation(EXIT_ON_CLOSE);
    add(b);
    b.setFont(new Font("Dialog", Font.PLAIN, 10));
    b.revalidate();
    setVisible(true);
  }

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