abstractShape + interfaceDrawable

AbstractShape.java

package lesson6.shapes;

public abstract class AbstractShape implements Drawable{

}

Circle.java

package lesson6.shapes;

import java.awt.*;

public class Circle extends AbstractShape {

    public Circle() {
    }

    @Override
    public void draw(Graphics g) {

        System.out.println("Draw circle");
        g.setColor(new Color(0, 240, 40));
        g.drawOval(50, 50, 100, 100);
    }
}

Drawable.java

package lesson6.shapes;

import java.awt.*;

public interface Drawable {

    public void draw(Graphics g);

}

Launcher3.java

package lesson6.shapes;


public class Launcher3 {

    public static void main(String[] args) {

        Drawable[] d = {new Circle(), new Rectangle(), new Square(), new Triangle()};
        new ShapesTemplate(d);
    }
}

Rectangle.java

package lesson6.shapes;

import java.awt.*;

public class Rectangle extends AbstractShape {

    public Rectangle() {
    }

    @Override
    public void draw(Graphics g) {

        System.out.println("Draw rectangle");
        g.setColor(new Color(255, 90, 90));
        int[] arrX = {100, 100, 150, 150};
        int[] arrY = {200, 300, 300, 200};
        g.fillPolygon(arrX, arrY, 4);
        
        g.setColor(new Color(0, 255, 255));
        g.fillRect(250, 200, 100, 150);
    }
}

ShapesTemplate.java

package lesson6.shapes;

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

public class ShapesTemplate extends JPanel {

    private Drawable[] shapes;

    public ShapesTemplate(Drawable[] shapes) {
        this.shapes = shapes;
        if (shapes == null || shapes.length < 1) {
            this.shapes = new Drawable[0];
        }

        JFrame frame = new JFrame("DAY 6, 2D Graphics");
        frame.setLocation(750, 150);
        frame.setMinimumSize(new Dimension(600, 400));
        frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
        frame.getContentPane().add(this);
        frame.pack();
        frame.setVisible(true);

        repaint();
    }

    @Override
    protected void paintComponent(Graphics g) {

        for (Drawable d : shapes) {
            d.draw(g);
        }
    }
}

Square.java

package lesson6.shapes;

import java.awt.*;

public class Square extends Rectangle{

    public Square() {
    }

    public void draw(Graphics g) {

        System.out.println("Draw square");

        g.setColor(new Color(30, 230, 200));
        g.fillRect(400, 50, 50, 50);
    }
}

Triangle.java

package lesson6.shapes;

import java.awt.*;

public class Triangle extends AbstractShape {

    public Triangle() {
    }

    @Override
    public void draw(Graphics g) {

        System.out.println("Draw triangle");
        g.setColor(new Color(0, 0, 255));
        int[] arrayX = {300, 600, 450};
        int[] arrayY = {100, 100, 300};

        Graphics2D g2d = (Graphics2D) g;
        g2d.setStroke(new BasicStroke(3));

        g.drawPolygon(arrayX, arrayY, 3);

        g2d.setStroke(new BasicStroke());
    }
}