16_抽象类

 

 1.定义

 

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 2.格式

 

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 3.使用

 

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 4.注意事项

 

 

abstract class Fu {
    int age = 10;

    public Fu() {
        System.out.println("Fu class created");
    }

    void show() {
        System.out.println("not abstract method");
    }

    abstract void showOne();
}

class Zi extends Fu {
    @Override
    void showOne() {
        System.out.println("Fu's abstract method");
    }
}