Detect mousePressed and mouseDragged with MouseAdapter

This example implement MouseAdpater to act as both MouseListener and MouseMotionListener, to handle mousePressed and mouseDragged to draw Oval on JComponent dynamically.

Detect mousePressed and mouseDragged with MouseAdapter

package javaswingdrawing;

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.SwingUtilities;

/**
 * @web http://java-buddy.blogspot.com/
 */
public class JavaSwingDrawing extends JComponent {
    
    int mouseX, mouseY;
    int mouseX_dragged, mouseY_dragged;
    boolean mouseDragged;

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

    public JavaSwingDrawing() {
        addMouseListener(myMouseAdapter);
        addMouseMotionListener(myMouseAdapter);
    }
    
    MouseAdapter myMouseAdapter = new MouseAdapter(){

        @Override
        public void mousePressed(MouseEvent e) {
            mouseX = e.getX();
            mouseY = e.getY();
            mouseDragged = false;
            repaint();
        }

        @Override
        public void mouseDragged(MouseEvent e) {
            mouseX_dragged = e.getX();
            mouseY_dragged = e.getY();
            mouseDragged = true;
            repaint();
        }

    };

    @Override
    public void paint(Graphics g) {
        
        Graphics2D graphics2d = (Graphics2D)g;
        graphics2d.setColor(Color.blue);
        if(mouseDragged){
            int x, y;
            int w, h;
            
            if(mouseX > mouseX_dragged){
                x = mouseX_dragged;
                w = mouseX - mouseX_dragged;
            }else{
                x = mouseX;
                w = mouseX_dragged - mouseX;
            }
            
            if(mouseY > mouseY_dragged){
                y = mouseY_dragged;
                h = mouseY - mouseY_dragged;
            }else{
                y = mouseY;
                h = mouseY_dragged - mouseY;
            }
            
            graphics2d.drawOval(x, y, w, h);
        }else{
            graphics2d.fillOval(mouseX-5, mouseY-5, 10, 10);
        }
    }

    private static void createAndShowGUI() {
        JFrame myFrame = new JFrame();
        myFrame.setTitle("java-buddy.blogspot.com");
        myFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        myFrame.setSize(new Dimension(400, 300));
        myFrame.setLayout(new BorderLayout());
        myFrame.add(new JavaSwingDrawing(), BorderLayout.CENTER);
        myFrame.setVisible(true);
    }
}