现有以下两个源文件：

①

package access.cookie2;

public class Cookie{

protected void bite(){

System.out.println("bite");

}

}

②

import access.cookie2.*;

public class ChocolateChip2 extends Cookie{

public void chomp(){

bite();

}

public static void main(String[] args){

ChocolateChip2 c = new ChocolateChip2();

c.chomp();

//bite() 为什么不能这样直接调用bite()而必须通过chomp()方法来调用bite()？

}

}