Java tutorial
import java.awt.FlowLayout; import javax.swing.JFrame; import javax.swing.JLabel; public class Main { public static void main(String[] args) { JFrame frame = new JFrame("Tool Tip Demo"); frame.setSize(200, 200); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); JLabel label = new JLabel("Hover on me!"); label.setToolTipText("My JLabel Tool Tip"); frame.getContentPane().setLayout(new FlowLayout(FlowLayout.CENTER)); frame.getContentPane().add(label); frame.setVisible(true); } }