Minimal Swing application that draws a line

SwingDrawingExample.java

package util.graphics;

import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Graphics2D;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;
import javax.swing.WindowConstants;

@SuppressWarnings("WeakerAccess")
public class SwingDrawingExample {

	public static void main(String[] args) {
		draw("Swing Drawing", 800, 600, (g, s) -> {
			g.setColor(Color.blue);
			g.drawLine(50, 50, s.width - 50, s.height - 50);
		});
	}

	public static void draw(String title, int width, int height, Draw draw) {
		SwingUtilities.invokeLater(() -> {
			JFrame frame = new JFrame();
			frame.add(new JPanel() {
				@Override
				public void paint(Graphics g) {
					draw.draw((Graphics2D) g, getSize());
				}
			});
			frame.setSize(width, height);
			frame.setTitle(title);
			frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
			frame.setVisible(true);

		});
	}

	public interface Draw {
		void draw(Graphics2D graphics2D, Dimension size);
	}
}