import java.awt.BorderLayout;
import java.awt.Container;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.JTextField;
import javax.swing.event.CaretEvent;
import javax.swing.event.CaretListener;
public class CaretSample {
public static void main(String args[]) {
JFrame frame = new JFrame("Caret Example");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
Container content = frame.getContentPane();
JTextArea textArea = new JTextArea();
JScrollPane scrollPane = new JScrollPane(textArea);
content.add(scrollPane, BorderLayout.CENTER);
final JTextField dot = new JTextField();
dot.setEditable(false);
JPanel dotPanel = new JPanel(new BorderLayout());
dotPanel.add(new JLabel("Dot: "), BorderLayout.WEST);
dotPanel.add(dot, BorderLayout.CENTER);
content.add(dotPanel, BorderLayout.NORTH);
final JTextField mark = new JTextField();
mark.setEditable(false);
JPanel markPanel = new JPanel(new BorderLayout());
markPanel.add(new JLabel("Mark: "), BorderLayout.WEST);
markPanel.add(mark, BorderLayout.CENTER);
content.add(markPanel, BorderLayout.SOUTH);
CaretListener listener = new CaretListener() {
public void caretUpdate(CaretEvent caretEvent) {
dot.setText("" + caretEvent.getDot());
mark.setText("" + caretEvent.getMark());
}
};
textArea.addCaretListener(listener);
frame.setSize(250, 150);
frame.setVisible(true);
}
}