设计Shape表示图形类，为抽象类，有面积属性area、周长属性per、颜色属性color，有两个构造方法（一个是默认的、一个是为颜色赋值的），还有3个抽象方法，分别是：getArea计算面积、getPer()计算周长、showAll输出所有信息，还有一个求颜色的方法getColor。接口Movaable,包括一个抽象方法：move(),输出图形移动信息。设计2个子类继承Shape，实现Moveable接口：Rectangle表示矩形类，增加两个属性，Width表示长度、Height表示宽度，重写getPer、getArea\showAll（显示矩形长、宽、颜色、面积、周长）和move()四个方法，另外又增加一个构造方法（一个是默认的、一个为高度、宽度、颜色赋值的）。Cirlcle表示圆类，增加1个属性，radius表示半径，重写getPer、getArea\showAll（显示矩形长、宽、颜色、面积、周长）和move()四个方法，另外又增加两个构造方法（一个是默认的、一个为半径、颜色赋值的）。测试类中，在main方法中，声明创建每个子类，并调用2个子类的showAll方法和move()方法。

抽象类Shape的代码实现如下：

public abstract class Shape {
    protected double area;
    protected double per;
    protected String color;

    public Shape() {
        color = "white";
    }

    public Shape(String color) {
        this.color = color;
    }

    public abstract double getArea();

    public abstract double getPer();

    public abstract void showAll();

    public String getColor() {
        return color;
    }

    public abstract void move();
}

接口Movable的代码实现如下：

public interface Movable {
    void move();
}

Rectangle类的代码实现如下：

public class Rectangle extends Shape implements Movable {
    private double width;
    private double height;

    public Rectangle() {
        super();
        width = 0;
        height = 0;
    }

    public Rectangle(double width, double height, String color) {
        super(color);
        this.width = width;
        this.height = height;
    }

    @Override
    public double getArea() {
        return width * height;
    }

    @Override
    public double getPer() {
        return 2 * (width + height);
    }

    @Override
    public void showAll() {
        System.out.println("Width: " + width);
        System.out.println("Height: " + height);
        System.out.println("Color: " + color);
        System.out.println("Area: " + getArea());
        System.out.println("Perimeter: " + getPer());
    }

    @Override
    public void move() {
        System.out.println("Rectangle is moving.");
    }
}

Circle类的代码实现如下：

public class Circle extends Shape implements Movable {
    private double radius;

    public Circle() {
        super();
        radius = 0;
    }

    public Circle(double radius, String color) {
        super(color);
        this.radius = radius;
    }

    @Override
    public double getArea() {
        return Math.PI * radius * radius;
    }

    @Override
    public double getPer() {
        return 2 * Math.PI * radius;
    }

    @Override
    public void showAll() {
        System.out.println("Radius: " + radius);
        System.out.println("Color: " + color);
        System.out.println("Area: " + getArea());
        System.out.println("Perimeter: " + getPer());
    }

    @Override
    public void move() {
        System.out.println("Circle is moving.");
    }
}

测试类的代码实现如下：

public class Test {
    public static void main(String[] args) {
        Shape shape1 = new Rectangle();
        Shape shape2 = new Circle();
        Shape shape3 = new Rectangle(2, 3, "red");
        Shape shape4 = new Circle(4, "blue");

        shape1.showAll();
        shape1.move();

        shape2.showAll();
        shape2.move();

        shape3.showAll();
        shape3.move();

        shape4.showAll();
        shape4.move();
    }
}

输出结果如下：

Width: 0.0
Height: 0.0
Color: white
Area: 0.0
Perimeter: 0.0
Rectangle is moving.
Radius: 0.0
Color: white
Area: 0.0
Perimeter: 0.0
Circle is moving.
Width: 2.0
Height: 3.0
Color: red
Area: 6.0
Perimeter: 10.0
Rectangle is moving.
Radius: 4.0
Color: blue
Area: 50.26548245743669
Perimeter: 25.132741228718345
Circle is moving.