Java Swing | ToolTip - GeeksforGeeks

05 Aug, 2021
We can add tooltip text to almost all the components of Java Swing by using the following method setToolTipText(String s). This method sets the tooltip of the component to the specified string s. When the cursor enters the boundary of that component a popup appears and text is displayed.
Methods used: 
getToolTipText() : returns the tooltip text for that component .setToolTipText(String s) : sets the tooltip text for the component .getToolTipText(MouseEvent e): returns the same value returned by getToolTipText(). Multi-part components such as JTabbedPane, JTable, and JTree override this method to return a string associated with the mouse event location.getToolTipLocation(MouseEvent e) : Returns the location (in the receiving component’s coordinate system) where the upper left corner of the component’s tool tip appears.
getToolTipText() : returns the tooltip text for that component .
setToolTipText(String s) : sets the tooltip text for the component .
getToolTipText(MouseEvent e): returns the same value returned by getToolTipText(). Multi-part components such as JTabbedPane, JTable, and JTree override this method to return a string associated with the mouse event location.
getToolTipLocation(MouseEvent e) : Returns the location (in the receiving component’s coordinate system) where the upper left corner of the component’s tool tip appears.
The following programs will illustrate the use of tooltiptext 
1. Program to create a textarea and single line tool tip text to it 
Java
// java Program to create a textarea and// single line tool tip text to itimport javax.swing.event.*;import java.awt.*;import javax.swing.*;class solve extends JFrame {     // frame    static JFrame f;     // text areas    static JTextArea t1;     // main class    public static void main(String[] args)    {        // create a new frame        f = new JFrame("frame");         // create a object        solve s = new solve();         // create a panel        JPanel p = new JPanel();         // create a text area        t1 = new JTextArea(20, 20);         // set tooltip text        t1.setToolTipText("this is a text Area");         // add text area        p.add(t1);         // add panel        f.add(p);         // set the size of frame        f.setSize(300, 300);         f.show();    }}
2. Program to create a text area and add multiple line tooltip text to it. 
Java
// java Program to create a text area and add// multiple line tooltip text to it.import javax.swing.event.*;import java.awt.*;import javax.swing.*;class solve extends JFrame {     // frame    static JFrame f;     // text areas    static JTextArea t1;     // main class    public static void main(String[] args)    {        // create a new frame        f = new JFrame("frame");         // create a object        solve s = new solve();         // create a panel        JPanel p = new JPanel();         // create a text area        t1 = new JTextArea(20, 20);         // create a multi line string using html using break tags        String s1 = "<html> this is a text area <br> please add text to it <br> it has 20 rows <br> it has 20 columns </html> ";         // set tooltip text        t1.setToolTipText(s1);         // add text area        p.add(t1);         // add panel        f.add(p);         // set the size of frame        f.setSize(300, 300);         f.show();    }}
Output: 
3. program to submit name using JTextField and the tooltip text shows the previous entries.(using getToolTipText function) 
Java
// java Program to submit name using JTextField and the tooltip// text shows the previous entries.(using// getToolTipText function)import java.awt.event.*;import java.awt.*;import javax.swing.*;class solve extends JFrame implements ActionListener {     // frame    static JFrame f;     // text areas    static JTextField t1;     // buttons    static JButton b;     // main class    public static void main(String[] args)    {        // create a new frame        f = new JFrame("frame");         // create a object        solve s = new solve();         // create a panel        JPanel p = new JPanel();         // create a text area        t1 = new JTextField(20);         // create a button        b = new JButton("submit");         // add actionlistener        b.addActionListener(s);         // create a multi line string using html using break tags        String s1 = "<html> please enter your name <br> previous entries are <br>     </html>";         // set tooltip text        t1.setToolTipText(s1);         // add text area and button        p.add(t1);        p.add(b);         // add panel        f.add(p);         // set the size of frame        f.setSize(300, 300);         f.show();    }     // if a button is performed    public void actionPerformed(ActionEvent e)    {        // if submit button is pressed add the name to the list of entries        // exclude the closing html tag by taking its substring        // add the name to the list of entries        // and add the html tag to the end of it         // get the tooltip text        String s = t1.getToolTipText();         t1.setToolTipText(s.substring(0, s.length() - 8) + t1.getText() + "<br>      <html");    }}
Output : 
Note: the following programs might not run in an online compiler please use an online IDE. 
ManasChhabra2
sweetyty
surinderdawra388
java-swing
Java
Programming Language
Java
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