如何使用Java在任何应用程序中插入符的位置？

Question

It seemed to be such a simple question, but after a long time researching the topic, I am still not able to find any answer to this. Using Java, I want to display a small tooltip next to a caret (text cursor) position. I need to caret position inside any application. That means if I open Word, Notepad, Chrome browser and I start typing I need to see X & Y of the cursor. Any way to do this using Java? I've seen implementations in C# on CodeProject, but I need to do this in java.

Answer 1

Basically use the .getMagicCaretPosition() function:

import java.awt.Dimension;
import java.awt.Point;

import javax.swing.*;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;
import javax.swing.text.Caret;
public class CaretPos implements Runnable
{
    JFrame frame;
    JPanel panel;
    JTextPane tPane;
    Caret newCaret;
    Point point;

    @Override
    public void run() {
        frame = new JFrame("CaretPos");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        panel = new JPanel();
        tPane = new JTextPane();
        newCaret = tPane.getCaret(); // you probably dont need to create another
                                     // Caret, but i did anyway to add the listener
        newCaret.addChangeListener(new ChangeListener() {

            @Override
            public void stateChanged(ChangeEvent e) {
                point = newCaret.getMagicCaretPosition();
                System.out.println(point);
            }
        });
        tPane.setCaret(newCaret);
        tPane.setPreferredSize(new Dimension(500,500));
        panel.add(tPane);
        frame.add(panel);
        frame.pack();
        frame.setVisible(true);
    }

    public static void main(String[] args)
    {
        CaretPos run = new CaretPos();
        SwingUtilities.invokeLater(run);
    }

}

I used a JTextPane, but im sure other swing components can be used

EDIT: Sorry I totally misunderstood your question. I thought you wanted to find the caret position in ANY of YOUR programs. My bad.