MyCanvas.java Source code

Introduction

Here is the source code for MyCanvas.java

Source

import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.geom.GeneralPath;
import java.awt.geom.Point2D;
import javax.swing.JComponent;
import javax.swing.JFrame;

class MyCanvas extends JComponent {
    public void paint(Graphics g) {
        Graphics2D g2D = (Graphics2D) g;
        Point2D.Float point = new Point2D.Float(100, 100); // store start point
        GeneralPath p = new GeneralPath(GeneralPath.WIND_NON_ZERO);
        p.moveTo(point.x, point.y);
        p.lineTo(point.x + 20.0f, point.y - 5.0f); // Line from start to A
        point = (Point2D.Float) p.getCurrentPoint();
        p.lineTo(point.x + 5.0f, point.y - 20.0f); // Line from A to B
        point = (Point2D.Float) p.getCurrentPoint();
        p.lineTo(point.x + 5.0f, point.y + 20.0f); // Line from B to C
        point = (Point2D.Float) p.getCurrentPoint();
        p.lineTo(point.x + 20.0f, point.y + 5.0f); // Line from C to D
        point = (Point2D.Float) p.getCurrentPoint();
        p.lineTo(point.x - 20.0f, point.y + 5.0f); // Line from D to E
        point = (Point2D.Float) p.getCurrentPoint();
        p.lineTo(point.x - 5.0f, point.y + 20.0f); // Line from E to F
        point = (Point2D.Float) p.getCurrentPoint();
        p.lineTo(point.x - 5.0f, point.y - 20.0f); // Line from F to g
        p.closePath(); // Line from G to start
        g2D.draw(p);
    }
}

public class PaintStar {
    public static void main(String[] a) {
        JFrame window = new JFrame();
        window.setBounds(30, 30, 300, 300);
        window.getContentPane().add(new MyCanvas());
        window.setVisible(true);
    }
}