public class SubClass extends Father {

String name;

public void study() {

this.name = "学习";

System.out.println(this.name);

}

public void money() {

this.name = "没钱";

System.out.println(this.name);

}

public static void main(String[] args) {

SubClass sub = new SubClass();

sub.money();

sub.study();

Father fa = new Father();

fa.money();

Father faSec = (Father)sub;

faSec.name = "父类";

System.out.println(">>>" + faSec.name);

faSec.money();

//SubClass subSec = (SubClass)fa;

//subSec.money();

//subSec.study();

Father faSecT = new SubClass();

faSecT.money();

//SubClass.test(subSec);

}

public static void test(Father sub){

sub.money();

}

}