java8을 이용해서 이런 application이 뜨게 만들어야 하는데요, mvc pattern을 이용해서 코딩을 하는게 처음이라 어떻게 해야할지 감이 잘 안잡히네요. slider이랑 button을 넣는건 간단한데, 저 중간에 들어가는 icon을 어떻게 해야 변형을 할 수 있는지, 그리고 처음에 창이 열렸을때 저렇게 yellow triangle icon을 나오게 세팅할 수 있는지가 궁금합니다. new Icon object를 instantiate/create해야하는건지 아니면 new rectangle object를 create해야하는건지도 잘 모르겠어요. Rectangle, Triangle, Circle은 각자 class가 따로 있고 다 첨부하면 너무 길어져서 Rectangle.java만 첨부했습니다. 그리고 view class도 첨부했어요. setcolor()은 model class에 있습니다.

import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.*;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;
public class View {
    private JFrame frame;
    private JPanel panel1;
    private JPanel panel2;
    private JSlider slider;
    private static final int slider_MIN = 20;
    private static final int slider_MAX = 150;
    private static final int slider_init = 20;
    private JButton rectangleButton = new JButton("rectangle");
    private JButton TriangleButton = new JButton("triangle");
    private JButton CircleButton = new JButton("circle");
    private JButton RedButton = new JButton("red");
    private JButton BlueButton = new JButton("blue");
    private JButton YellowButton = new JButton("yellow");

    public View() {
        frame = new JFrame();
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setVisible(true);
        frame.getContentPane().setLayout(new BorderLayout());

        panel1 = new JPanel();//default is flowlayout so no setLayout
        panel1.add(rectangleButton);
        rectangleButton.addActionListener(new ActionListener() {

            @Override
            public void actionPerformed(ActionEvent e) {
                // TODO Auto-generated method stub
                Rectangle r = new Rectangle(100);//create a new rectangle icon


            }

        });
        panel1.add(TriangleButton);
        panel1.add(CircleButton);
        frame.add(panel1, BorderLayout.NORTH);

        panel2 = new JPanel();
        panel2.add(RedButton);
        RedButton.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                setColor(Color.RED);//color for the image in the middle
            }
        });

        panel2.add(BlueButton);
        BlueButton.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                setColor(Color.BLUE);
            }
        });

        panel2.add(YellowButton);
        YellowButton.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                setColor(Color.YELLOW);
            }
        });

        frame.add(panel2, BorderLayout.SOUTH);

        slider = new JSlider(JSlider.VERTICAL, slider_MIN, slider_MAX, slider_init);
        //slider.addChangeListener(this);
        slider.setMajorTickSpacing(10);
        slider.setMinorTickSpacing(5);
        slider.setPaintTicks(true);
        slider.setPaintLabels(true);
        slider.addChangeListener(new ChangeListener() {
            @Override
            public void stateChanged(ChangeEvent e) {
                JSlider source = (JSlider)e.getSource();
                if(!source.getValueIsAdjusting()) {
                    int fps = (int)source.getValue();
                    setSize(fps);//setSize for the image
                }
            }
        });

        frame.add(slider, BorderLayout.WEST)


    }

}

public class Rectangle implements Icon {
    private int width;
    private int height;

    public Rectangle(int w) {
        this.width = w;
        this.height = w;
    }

    public int getIconWidth() {
        return width;
    }

    public int getIconHeight() {
        return height;
    }

    public void paintIcon(Component c, Graphics g, int x, int y) {
        Graphics2D g2 = (Graphics2D) g;
        Rectangle2D.Double rectangle = new Rectangle2D.Double(x, y, width, height);
        g2.setColor(Color.BLUE);
        g2.fill(rectangle);
    }

    public static void main(String[] args) {
        Rectangle icon = new Rectangle(20);
    }
}