CaretSample.java Source code

Introduction

Here is the source code for CaretSample.java

Source

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);
    }
}