プログラミング実習I : 課題 R10

public class DisplayCarTrain extends MyFrame2{

    public void run() {

        Car car1 = new Car(10, 50, 3, 0);
        car1.draw(this);

        Train train1 = new Train(30, 150, 3, 0);
        train1.draw(this);
    }

    public static void main(String[] args) {
        new DisplayCarTrain();
    }

}

public class Vehicle {

}

public class Car extends Vehicle {
    int x, y, vx, vy;
    public Car (int x, int y,  int vx, int vy) {
        this.x = x;
        this.y = y;
        this.vx = vx;
        this.vy = vy;
    }

    public void draw(MyFrame2 frame) {

        frame.fillRect(x+20, y, 40, 20);
        frame.fillRect(x, y+20, 80, 20);
        frame.fillOval(x+10, y+40, 20, 20);
        frame.fillOval(x+50, y+40, 20, 20);
    }

    public void move() {
        x += vx;
        y += vy;
    }
}

public class Train extends Vehicle {
    int x, y, vx, vy;
    public Train (int x, int y,  int vx, int vy) {
        this.x = x;
        this.y = y;
        this.vx = vx;
        this.vy = vy;
    }

    public void draw(MyFrame2 frame) {
        frame.fillRect(x, y, 100, 30);
        frame.fillOval(x+5, y+30, 10, 10);
        frame.fillOval(x+15, y+30, 10, 10);
        frame.fillOval(x+75, y+30, 10, 10);
        frame.fillOval(x+85, y+30, 10, 10);
    }

    public void move() {
        x += vx;
        y += vy;
    }
}