How to add a tooltip to a component in Java?

Let us first create a component −

JLabel label1; label1 = new JLabel("Id", SwingConstants.CENTER); Now, set the tooltip for the above component − label1.setToolTipText("Enter Id");

Example

The following is an example to add a tooltip to a component in Java −

package my; import java.awt.GraphicsEnvironment; import java.awt.GridLayout; import java.awt.Point; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JPasswordField; import javax.swing.JTextField; import javax.swing.SwingConstants; public class SwingDemo {    public static void main(String[] args) throws Exception {       JFrame.setDefaultLookAndFeelDecorated(true);       JFrame frame = new JFrame("Register!");       JLabel label1, label2, label3;       frame.setLayout(new GridLayout(2, 2));       label1 = new JLabel("Id", SwingConstants.CENTER);       label1.setToolTipText("Enter Id");       label2 = new JLabel("Age", SwingConstants.CENTER);       label2.setToolTipText("Enter Age");       label3 = new JLabel("Password", SwingConstants.CENTER);       label3.setToolTipText("Enter Password");       JTextField emailId = new JTextField(20);       JTextField age = new JTextField(20);       JPasswordField passwd = new JPasswordField();       passwd.setEchoChar('*');       frame.add(label1);       frame.add(label2);       frame.add(label3);       frame.add(emailId);       frame.add(age);       frame.add(passwd);       Point center = GraphicsEnvironment.getLocalGraphicsEnvironment().getCenterPoint();       int width = 500;       int height = 200;       frame.setBounds(center.x - width / 2, center.y - height / 2, width, height);       frame.setVisible(true);    } }

Output

The output is as follows. On keeping mouse cursor, the tooltip text is visible −