Program to demonstrate how to use and set ToolTip for Swing components in Java  
Output of the program :
  
package com.hubberspot.example;
import java.awt.Container;
import java.awt.FlowLayout;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
public class ToolTipDemo {
 public static void main(String[] args) {
  // 1. Create a simple frame by creating an object 
  // of JFrame. 
  JFrame frame = new JFrame();
  // 2. Give the frame a title "Tool Tip Frame" by calling 
  // setTitle method on frame object
  frame.setTitle("Tool Tip Frame");
  // 3. Give frame a size in pixels as say 300,300 
  frame.setSize(300, 300);
  // 4. set a operation when a user close the frame, here it 
  // closes the frame and exits the application
  frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
  // 5. Create a button by creating an Object of class 
  // JButton. 
  JButton button = new JButton();
  // 6. set the text of button as "Button"
  button.setText("Button");
  // 7. Create a label by creating an Object of class 
  // JLabel
  JLabel label = new JLabel();
  // 8. set the text of label as "Label"
  label.setText("Label");
  // 9. In order to create a tool tip for label, 
  // button or any swing components, we call setToolTipText
  // method and passing it the information we want to display 
  // when user hovers over the swing components
  button.setToolTipText("Tool Tip for Button");
  label.setToolTipText("Tool Tip for Label");
  // 10. for adding all these swing components to frame
  // we first get the content pane which returns a 
  // Container
  Container container = frame.getContentPane();
  // 11. We create a Layout for Swing Components
  // here we are using FlowLayout with value as "center'
  // it will make the swing components float to center
  FlowLayout layout = new FlowLayout(FlowLayout.CENTER);
  // 12. We set the layout for container
  container.setLayout(layout);
  // 13. We add the button and label to it
  container.add(button);
  container.add(label);
  // 14. after adding button and label, we make it 
  // visible on the frame by calling the method as 
  // setVisible and passing value as true.
  frame.setVisible(true);
 }
}
Output of the program :
 


 
