import java.awt.BorderLayout;
import java.awt.Dimension;

import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JTextArea;
import javax.swing.SwingUtilities;
import javax.swing.event.CaretEvent;
import javax.swing.event.CaretListener;
import javax.swing.text.BadLocationException;

public class CursorPosition implements CaretListener {
    
    private JTextArea area;
    private JLabel label;
    
    public CursorPosition(){
        initComponents();
    }

    private void initComponents() {
        area = new JTextArea();
        area.addCaretListener(this);
        label = new JLabel();
        JFrame frame = new JFrame("Cursor-Position");
        frame.add(area, BorderLayout.CENTER);
        frame.add(label, BorderLayout.NORTH);
        frame.setSize(new Dimension(400,300));
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setVisible(true);
    }

    public void caretUpdate(CaretEvent e) {
        int cPos = area.getCaretPosition();

        try {
            int lineNumber = area.getLineOfOffset(cPos); // beginnt bei 0

            int startOffset = area.getLineStartOffset(lineNumber);
            String str = area.getText(startOffset, (cPos - startOffset));
            int len = str.length();

            label.setText("Zeile: " + new Integer(lineNumber + 1).toString()
                    + " | Spalte: " + new Integer(len + 1).toString());
        } catch (BadLocationException e1) {
        }
    }

    public static void main(String[] args) {
        SwingUtilities.invokeLater(() -> new CursorPosition());
    }
}