import java.awt.BorderLayout;

import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JTextField;
import javax.swing.ToolTipManager;
import javax.swing.WindowConstants;

public class TestTooltip {

                      public static void main(String[] args) {
                                            JFrame frame = new JFrame("Tooltip test");
                                            JPanel pane = new JPanel(new BorderLayout());
                                            JTextField textfield = new JTextField("text with tooltip");
                                            textfield.setEditable(false);
                                            ToolTipManager.sharedInstance().setInitialDelay(100);
                                            ToolTipManager.sharedInstance().setReshowDelay(100);
                                            textfield.setToolTipText("<html><img src=\"https://pbs.twimg.com/profile_images/1145865357/openjdk_400x400.png\"></html>");
                                            pane.add(textfield);
                                            frame.add(pane);
                                            frame.setSize(800, 600);
                                            frame.setLocationRelativeTo(frame);
                                            frame.setDefaultCloseOperation(WindowConstants.DISPOSE_ON_CLOSE);
                                            frame.setVisible(true);
                      }
}