Java编程思想第六章

Exercise 4

展示protected方法具有包访问权限，但是它仍不是public的。

package accesscontrol;public class baoneiclass {protected static void hey() {System.out.println("Hey Man!");}}

package accesscontrol;public class diaoyong {public static void main(String[] args) {baoneiclass.hey();}}

package access;public class waibuclass {public static void main(String[] args) {accesscontrol.baoneiclass.hey();}}

错误信息：

Error: Unresolved compilation problem: 

The method hey() from the type baoneiclass is not visible

包外的类无法调用包内的protected方法哦