import javax.swing.JButton;
import javax.swing.JFrame;
public class JButtonWithTooltip extends JFrame {
public JButtonWithTooltip() {
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JButton b = new JButton("Test");
b.setToolTipText("Help text for the button");
getContentPane().add(b, "Center");
pack();
}
public static void main(String[] args) {
new JButtonWithTooltip().setVisible(true);
}
}