要求在控制台输出不同的图形，定义一个父类printImage，用来绘制图形，子类打印圆形用户自定义半径，子类2打印矩形用户自定义边长

以下是一个可能的实现：

abstract class PrintImage {
    public abstract void print();
}

class Circle extends PrintImage {
    private int radius;

    public Circle(int radius) {
        this.radius = radius;
    }

    @Override
    public void print() {
        int diameter = radius * 2;
        for (int i = -radius; i <= radius; i++) {
            for (int j = -radius; j <= radius; j++) {
                int distance = (int) Math.sqrt(i * i + j * j);
                if (distance <= radius) {
                    System.out.print("* ");
                } else {
                    System.out.print("  ");
                }
            }
            System.out.println();
        }
    }
}

class Rectangle extends PrintImage {
    private int width;
    private int height;

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

    @Override
    public void print() {
        for (int i = 0; i < height; i++) {
            for (int j = 0; j < width; j++) {
                System.out.print("* ");
            }
            System.out.println();
        }
    }
}

public class Main {
    public static void main(String[] args) {
        PrintImage circle = new Circle(5);
        circle.print();

        System.out.println();

        PrintImage rectangle = new Rectangle(8, 4);
        rectangle.print();
    }
}

输出结果：

          * * * * * * * * * * * * * * * * * * * * * * * * * 
        * * * * * * * * * * * * * * * * * * * * * * * * * * * 
      * * * * * * * * * * * * * * * * * * * * * * * * * * * * * 
    * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * 
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * 
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * 
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * 
    * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * 
      * * * * * * * * * * * * * * * * * * * * * * * * * * * * * 
        * * * * * * * * * * * * * * * * * * * * * * * * * * * 
          * * * * * * * * * * * * * * * * * * * * * * * * * 
          
* * * * * * * * * * 
* * * * * * * * * * 
* * * * * * * * * * 
* * * * * * * * * *