clone()' has protected access in 'java.lang.Object Java中的clone()方法 在Java中,我们经常需要复制对象以便在不改变原始对象的情况下进行操作。为了实现对象的复制,Java提供了一个clone()方法。然而,当我们尝试使用clone()方法时,可能会遇到一个编译错误提示:'clone()' has protected access in 'java.lang.O...
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...
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 the reason why you are getting the above compiler error is that you have not followed either 1 or both of the basic required step...
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' ...
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...
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 ...
🍀Access level modifiersdetermine whether other classes can use a particularfieldor invoke a particularmethod. 访问级别修饰符决定其他类是否可以使用特定成员变量或调用特定成员方法方法。 Java 中有 4 个级别的访问控制: 🍀public:在所有类中都是可见的 ...
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...