MainClass.java Source code

Introduction

Here is the source code for MainClass.java

Source

import java.awt.BorderLayout;
import java.awt.Rectangle;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;

import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JTextField;
import javax.swing.KeyStroke;
import javax.swing.text.BadLocationException;

public class MainClass {

    public static void main(final String args[]) {
        JFrame frame = new JFrame("Popup Example");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        final JTextField textField = new JTextField();
        frame.add(textField, BorderLayout.NORTH);

        ActionListener actionListener = new ActionListener() {
            public void actionPerformed(ActionEvent actionEvent) {

                int dotPosition = textField.getCaretPosition();
                Rectangle popupLocation = null;
                try {
                    popupLocation = textField.modelToView(dotPosition);
                } catch (BadLocationException e) {
                    e.printStackTrace();
                }
                System.out.println(popupLocation);
            }
        };

        KeyStroke keystroke = KeyStroke.getKeyStroke(KeyEvent.VK_PERIOD, 0, false);
        textField.registerKeyboardAction(actionListener, keystroke, JComponent.WHEN_FOCUSED);

        frame.setSize(250, 150);
        frame.setVisible(true);
    }

}