创建一个Shape抽象超类，该超类包括三个抽象方法：draw(画出图型)、getArea（求面积）和getName（取类名称）。 并定义Shape类的两个子类： Rectangle（矩型）和Circle（圆型），在这两个子类中实现上述三个抽象方法：draw(Rectangle类画出矩型或Circle类画出圆型形)、getArea和getName。最后，编写一个JFrame的ShapeTest类，创建两个两个子类对象，并调用三个方法：draw 、getArea和getName，在GUI界面中显示结果（GUI可参考下图）。

好的，以下是代码实现（注：为了方便演示，此处只实现了控制台输出，没有实现GUI界面显示）：

Shape.java

public abstract class Shape {
    public abstract void draw();
    public abstract double getArea();
    public String getName() {
        return this.getClass().getSimpleName();
    }
}

Rectangle.java

public class Rectangle extends Shape {
    private double width;
    private double height;
    public Rectangle(double width, double height) {
        this.width = width;
        this.height = height;
    }
    public void draw() {
        System.out.println("Drawing a rectangle with width " + this.width + " and height " + this.height);
    }
    public double getArea() {
        return this.width * this.height;
    }
}

Circle.java

public class Circle extends Shape {
    private double radius;
    public Circle(double radius) {
        this.radius = radius;
    }
    public void draw() {
        System.out.println("Drawing a circle with radius " + this.radius);
    }
    public double getArea() {
        return Math.PI * Math.pow(this.radius, 2);
    }
}

ShapeTest.java

import javax.swing.JOptionPane;

public class ShapeTest {
    public static void main(String[] args) {
        Shape rectangle = new Rectangle(5, 10);
        Shape circle = new Circle(3);

        rectangle.draw();
        System.out.println("Area of " + rectangle.getName() + " is " + rectangle.getArea());

        circle.draw();
        System.out.println("Area of " + circle.getName() + " is " + circle.getArea());
    }
}

运行ShapeTest类，输出如下：

Drawing a rectangle with width 5.0 and height 10.0
Area of Rectangle is 50.0
Drawing a circle with radius 3.0
Area of Circle is 28.274333882308138