Java程序怎么写，求指点

Question

麻烦各位大神帮我看看怎么写，感谢大家

Answer 1

class Triangle extends Graphic {

    double[] length;

    public Triangle(double[] length) {
        this.length = length;
    }

    @Override
    void draw() {
        System.out.println("draw a triangle and length is : " + Arrays.toString(length));
    }
}