Place Text and Icon together in Java

    /*from ww  w .  j a  va 2s.co  m*/
import javax.swing.Icon;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
public class Main {
  public static void main(String args[]) {
    JFrame frame = new JFrame("DefaultButton");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    Icon warnIcon = new ImageIcon("a.gif");
    JButton button3 = new JButton("Warning", warnIcon);
    frame.add(button3);
    frame.setSize(300, 200);
    frame.setVisible(true);
  }
}