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What is a private class?
A private class is a class that cannot be directly accesed from outside its outer class, similar to a private variable or method. This means that a private class must always be an inner class, though an inner class can be public or protected instead. For instance, the following is valid and means that any X object cannot directly access the inner Y class. public class X { private class Y{} } The following however is invalid. private class X{}
Can you access in drive class from base class private data?
Base class should no knowledge about derived classes. The "private" modifier on a data member means private to the class which defined it. Base class cannot directly reference/access the private data member of the derived class, and the derived classes cannot access the private data member defined in the base class. Either way the accessing the private data member should be done via properties or getters
What does private int mean in java?
The private keyword denotes that the field or method is hidden from view of any other class. class MyClass { private int n; // n cannot be accessed by any class except MyClass private void doSomething(){} // doSomething cannot be accessed by any class except MyClass }
Can you declared constructor as private?
If you declare the main method anything other than public, it will not run. If you declare main method as private, you would not be able to execute the class as a standalone java program. Any java class that needs to be executed as a standalone file needs to have a main method that is public, static and returns a void. Otherwise the Java compiler would not recognize the file as an executable standalone java file and would not allow you to run it.
Is it true that a derived class inherits all the members of its base class?
False. A derived class inherits the public and protected members of its base class. Private members of the base class cannot be inherited.
Why toplevel class cannot be static?
A toplevel class certainly can be static. Static has nothing to do with the level of a class.
What specifies private access modifier and private base class?
A private variable is something that is not visible outside the class. A private class is one that cannot be inherited
What is a private class?
A private class is a class that cannot be directly accesed from outside its outer class, similar to a private variable or method. This means that a private class must always be an inner class, though an inner class can be public or protected instead. For instance, the following is valid and means that any X object cannot directly access the inner Y class. public class X { private class Y{} } The following however is invalid. private class X{}
Can you access in drive class from base class private data?
Base class should no knowledge about derived classes. The "private" modifier on a data member means private to the class which defined it. Base class cannot directly reference/access the private data member of the derived class, and the derived classes cannot access the private data member defined in the base class. Either way the accessing the private data member should be done via properties or getters
What does private int mean in java?
The private keyword denotes that the field or method is hidden from view of any other class. class MyClass { private int n; // n cannot be accessed by any class except MyClass private void doSomething(){} // doSomething cannot be accessed by any class except MyClass }
Can you define class as private in java?
Yes. However, ONLY nested classes (as in sub-classes of a top-level class) could be declared as private. The main (top-level) class cannot be private as it couldn't be accessed.
Can you declared constructor as private?
If you declare the main method anything other than public, it will not run. If you declare main method as private, you would not be able to execute the class as a standalone java program. Any java class that needs to be executed as a standalone file needs to have a main method that is public, static and returns a void. Otherwise the Java compiler would not recognize the file as an executable standalone java file and would not allow you to run it.
What are the difference between private variable and final variable?
A private variable is one that is accessible only to the current class and cannot be accessed by any other class, including the ones that extend from it. A final variable is one that cannot be modified once it is initialized and assigned a value.
Is it true that a derived class inherits all the members of its base class?
False. A derived class inherits the public and protected members of its base class. Private members of the base class cannot be inherited.
How do you abbreviate Private First Class?
How to abbreviate Private First Class
Can you implement a constructor in private part of code?
no we cannot initialize a constructor in private in order to call a constructor from outside of a class it must be a public member.in order to create an object we should call the constructor .so only private members can implement outside of the class.
What do you mean by protected derivation of a sub class from base class?
When you derive a class (the sub-class) from a base class using protected access, all public members of the base class become protected members of the derived class, while protected members of the base class will remain protected. Private members are never inherited so they remain private to the base class. By contrast, if you use public inheritance, the public members of the base class remain public to the derived class, while protected members of the base class remain protected in the derived class. If you use private inheritance, both the public and protected members of the base class become private to the derived class. Note that accessibility cannot be increased, only reduced or left the same. That is, a protected member of a base class cannot be inherited as a public member of a derived class -- it can only be declared private or remain protected. Note also that accessibility is viewed from outside of the derived class. That is, all members of a base class other than the private members are inherited by the derived class and are therefore fully accessible to the derived class. But from outside of the derived class, all base class accessibility is determined by the access specified by the type of inheritance.
