调试下面的程序，分析下错误的原因

class AA{
public void test() throws IOException{
System.out.println("In AA’s test()");
}}
class BB extends AA{
public void test () throws FileNotFoundException{
System.out.println("In BB’s test()");
}
}
class CC extends AA{
public void test () throws Exception{
System.out.println("In CC’s test()");
}
}

子类的重写方法抛出的异常不能比父类还要大 Exception 是IOException 的父类 会报错

class AA{
    public void test() throws IOException {
        System.out.println("In AA’s test()");
    }}
class BB extends AA{
    @Override
    public void test () throws FileNotFoundException {
        System.out.println("In BB’s test()");
    }
}
class CC extends AA{
    @Override
    public void test () {
        System.out.println("In CC’s test()");
    }
}