定义一个抽象（abstract）类

奋进的小暄

于 2025-01-31 10:06:48 发布

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文章标签： java 开发语言

本文链接：https://blog.youkuaiyun.com/2301_81564787/article/details/145403814

版权

package demo;
    public abstract class Shape {
        public abstract void draw();
    }

    abstract class A extends Shape {
        abstract void test();
    }

    class C extends A {

        void test() {

        }
        public void draw() {

        }
    }

package demo;
    public class Cycle extends Shape{
        public void draw() {
            System.out.println("画一个○！！！！！");
        }
    }

package demo;
public class Flower extends Shape{
    @Override
    public void draw() {
        System.out.println("画一朵❀！！");
    }
}

package demo;
public class Test {
    public static void main(String[] args) {
        Cycle cycle = new Cycle();
        Flower flower = new Flower();

        Shape[] shapes = {cycle, cycle, flower, flower};
        for (Shape shape : shapes) {
            shape.draw();
        }


        //Shape shape = new Shape();

        Shape shape = new Cycle();

    }
}