在上面的代码中,Child类继承自Parent类,Child类中尝试访问父类中的protected成员protectedNum。然而,当我们尝试编译运行这段代码时,会出现错误提示:protectedNum has protected access in Parent。 解决方法 为了解决这个问题,我们需要明确protected修饰符的使用规则。protected成员只能在同一包内或者子类中进行访问,而不能在...
AI检测代码解析 这一行却飘红了,idea提示“'innerclass.exercise6.other.Computer.Mouse' has protected access in 'innerclass.exercise6.other.Computer'” 这我就很疑惑了,Lenovo作为Computer的子类,也能够正常访问同样是protected类型的成员变量i,甚至我可以单单声明一个Mouse类型的变量(但不实例化),为啥一 调用Mo...
这里再给出《java in a nutshell》中的一段话: protected access requires a little more elaboration. Suppose class A declares a protected field x and is extended by a class B, which is defined in a different package (this last point is important). Class B inherits the protected field x, and...
这里再给出《java in a nutshell》中的一段话: protected access requires a little more elaboration. Suppose class A declares a protected field x and is extended by a class B, which is defined in a different package (this last point is important). Class B inherits the protected field x, and...
Proteced只能被同一个包内的或者子类的class访问 那么在另一个包的如下代码有问题吗? Sub sub = new Sub();sub.setId(9L);System.out.println(sub.getId()); 第二行会出现编译错误 'setId(java.lang.Long)' has protected access in 'package.xxx' ...
Core Java Design About Us If you are trying to clone an object in java and are getting the below compilation error - clone() has protected access in java.lang.Object Then thereason why you are getting the above compiler error is that you have not followed either 1 or both of...
The protected keyword in Java is an access modifier used for member variables and methods. It provides a level of access control that allows access within the same package and by subclasses, even if they are in different packages. Usage The protected access modifier is used to restrict access ...
In the Java programming language, fields, constructors, methods, and classes can be marked with access modifiers.In this tutorial, we’ll look atprotectedaccess. 2. TheprotectedKeyword While elements declared asprivatecan be accessed only by the class in which they’re declared,theprotectedkeyword...
void main(String[] args) { 。。。详情网上找“马克-to-win”，参考他的网站或他的百度空间：java第三章的内容，如果实在找不到，按我下面说的地址找：网站名是：mark-to-win.com 再附加上下边的路径地址： /JavaBeginner/JavaBeginner3_web.html#InheritanceAccessControl public公共，加上这个...
我们已经清楚Object.clone()是protected方法。这说明，该方法可以被同包（java.lang）下和它（java.lang.Object）的子类访问。这里是MyObject类（默认继承java.lang.Object）。同样Test也是java.lang.Object的子类。但是，不能在一个子类中访问另一个子类的protected方法，尽管这两个子类继承自同一个父类。再看示例2...