Caret Events and Listeners : CaretListener « Swing Event « Java Tutorial

Whenever a caret changes its position or if text is selected, a caret event is fired by a text component. The class CaretEvent supports the methods getDot() and getMark() to retrieve the current location and the end position of a text selection, respectively.

Caret Events and Listeners
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTextField;
import javax.swing.event.CaretEvent;
import javax.swing.event.CaretListener;

public class CaretEeventListener {

  public static void main(String[] a) {
    JFrame frame = new JFrame();

    JTextField textField = new JTextField();

    textField.addCaretListener(new CaretListener() {

      public void caretUpdate(CaretEvent e) {


    frame.add(new JScrollPane(textField));

    frame.setSize(300, 200);


15.8.1.Caret Events and ListenersCaret Events and Listeners
15.8.2.Listen to CaretEvent with CaretListener