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Caret Events and Listeners

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. 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();     frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);     JTextField textField = new JTextField();     textField.addCaretListener(new CaretListener() {       public void caretUpdate(CaretEvent e) {         System.out.println(e);       }     });     frame.add(new JScrollPane(textField));     frame.setSize(300, 200);     frame.setVisible(true);   } }