Java里面知识点 总结

[code]package cn.loltime.abstractclass;
public abstract class FirstClass{

    public abstract void run();

    public static void main(String[] args){

        //FirstClass firstClass = new FirstClass(); 错误 不能实例化 
        ThirdClass  thirdClass = new ThirdClass();
        thirdClass.fun(new FirstClass(){

            @Override
            public void run() {
                // TODO Auto-generated method stub

            }

        });

    }
}

class SecondClass extends FirstClass{

    @Override
    public void run() {
        // TODO Auto-generated method stub

    }
}

class ThirdClass{
    public void  fun(FirstClass first){

    }
}