Main.java Source code

Introduction

Here is the source code for Main.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.JLabel;
import javax.swing.JMenuItem;
import javax.swing.JPopupMenu;
import javax.swing.JTextField;
import javax.swing.KeyStroke;
import javax.swing.text.BadLocationException;

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

        final JPopupMenu popup = new JPopupMenu();
        JMenuItem menuItem1 = new JMenuItem("Option 1");
        popup.add(menuItem1);

        JMenuItem menuItem2 = new JMenuItem("Option 2");
        popup.add(menuItem2);

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

        ActionListener actionListener = new ActionListener() {
            public void actionPerformed(ActionEvent actionEvent) {
                try {
                    int dotPosition = textField.getCaretPosition();
                    Rectangle popupLocation = textField.modelToView(dotPosition);
                    popup.show(textField, popupLocation.x, popupLocation.y);
                } catch (BadLocationException badLocationException) {
                    System.err.println("Oops");
                }
            }
        };
        KeyStroke keystroke = KeyStroke.getKeyStroke(KeyEvent.VK_PERIOD, 0, false);
        textField.registerKeyboardAction(actionListener, keystroke, JComponent.WHEN_FOCUSED);

        frame.add(new JLabel("Press '.' to activate Popup menu"), BorderLayout.SOUTH);
        frame.setSize(250, 150);
        frame.setVisible(true);
    }
}