为什么我不能在包外使用受保护的构造函数？[重复]

protected修饰符仅用于包中以及包外部的子类中。使用对象创建对象时

Example ex=newExample();

由于父类构造函数受到保护，因此您会遇到编译时错误。您需要根据JSL 6.6.2.2调用受保护的构造函数，如示例2所示。

package Super;public class SuperConstructorCall {    protected SuperConstructorCall() {    }}package Child;import Super.SuperConstructorCall;public class ChildCall extends SuperConstructorCall{    public static void main(String[] args) {        SuperConstructorCall s = new SuperConstructorCall(); // Compile time error saying SuperConstructorCall() has protected access in SuperConstructorCall    }}

符合JLS
6.6.2.2的
示例2
：

package Super;    public class SuperConstructorCall {    protected SuperConstructorCall() {    }}package Child;import Super.SuperConstructorCall;public class ChildCall extends SuperConstructorCall{    public static void main(String[] args) {        SuperConstructorCall s = new SuperConstructorCall(){}; // This will work as the access is by an anonymous class instance creation expression     }}