请用java创建一个Shape公共类，该类具有length和height两个属性，具有带参数和不带参数的构造方法和每个属性的get和set方法，编写通过两个属性计算该图形面积和周长的方法。并创建一个Test测试类，创建Shape类的对象，并计算相应对象的面积和周长。

好的，下面是Java代码实现。

Shape类：

public class Shape {
    private double length;
    private double height;

    public Shape() {}

    public Shape(double length, double height) {
        this.length = length;
        this.height = height;
    }

    public double getLength() {
        return length;
    }

    public void setLength(double length) {
        this.length = length;
    }

    public double getHeight() {
        return height;
    }

    public void setHeight(double height) {
        this.height = height;
    }

    public double getArea() {
        return length * height;
    }

    public double getPerimeter() {
        return 2 * (length + height);
    }
}

Test类：

public class Test {
    public static void main(String[] args) {
        Shape shape = new Shape(2.5, 3.7);
        System.out.println("面积：" + shape.getArea());
        System.out.println("周长：" + shape.getPerimeter());
    }
}

输出结果：

面积：9.25
周长：12.4