package test1;public class Rectangle1 {    private float length;    private float width;    float S=length*width;//矩形的底面积    public Rectangle1(float length,float width) {        this.length=length;        this.width=width;    }    public Rectangle1() {        // TODO 自动生成的构造函数存根    }    public float getLength() {        return length;    }    public void setLength(float length) {        this.length = length;    }    public float getWidth() {        return width;    }    public void setWidth(float width) {        this.width = width;    }    public void printMessage(){        System.out.println("长为："+length+"宽为："+width+"面积为："+length*width);    }    public static void main(String[] args) {        Rectangle1 a=new Rectangle1(10,20);        a.printMessage();        Cubiod1 b=new Cubiod1(10,20,30);        b.printMessage();    }}    class Cubiod1 extends Rectangle1{    private float height;//长方体的高    public Cubiod1(float length, float width,float height) {        super(length, width);        this.height = height;        // TODO 自动生成的构造函数存根    }    public Cubiod1() {        // TODO 自动生成的构造s函数存根    }        public float getLength() {        return super.getLength();    }    public void setLength(float length) {        super.setLength(length);    }    public float getWidth() {        return super.getWidth();    }    public void setWidth1(float width) {        super.setWidth(width);    }    public float getHeight() {        return height;    }    public void setHeight(float height) {        this.height = height;    }    float V=super.getLength()*super.getWidth()*height;//长方体的体积    public void printMessage(){        System.out.println("长为："+super.getLength()+"宽为："+super.getWidth()+"高为"+height+"体积为："+super.getLength()*super.getWidth()*height);    }        }