Java语言编写代码

Java语言编写代码

代码如下/** * Author: zhyx * Date:2017/11/30 * Time:8:56 */public abstract class Contailner {    double r;    abstract double volume();}/** * Author: zhyx * Date:2017/11/30 * Time:8:57 */public class Cube extends Contailner {    public Cube(double r) {        this.r=r;    }    @Override    double volume() {        return r*r*r;    }}/** * Author: zhyx * Date:2017/11/30 * Time:9:01 */public class Sphere extends Contailner {    public Sphere(double r) {        this.r=r;    }    @Override    double volume() {        return 4/3*Math.PI*r*r*r;    }}/** * Author: zhyx * Date:2017/11/30 * Time:9:02 */public class Tiji {    public static void main(String[] args) {        Cube cube=new Cube(4);        System.out.println("立方体体积为："+cube.volume());        Sphere sphere= new Sphere(4);        System.out.println("球体体积为："+sphere.volume());    }}