Access Modifiers in Java | Java Course | A2IT ONLINE
Access Modifiers in Java | Java Course | A2IT ONLINE
There are two types of modifiers in Java: access modifiers and non-access modifiers.
The access modifiers in Java specifies the accessibility or scope of a field, method, constructor, or class. We can change the access level of fields, constructors, methods, and class by applying the access modifier on it.
There are four types of Java access modifiers:
Private: The access level of a private modifier is only within the class. It cannot be accessed from outside the class.
Default: The access level of a default modifier is only within the package. It cannot be accessed from outside the package. If you do not specify any access level, it will be the default.
Protected: The access level of a protected modifier is within the package and outside the package through child class. If you do not make the child class, it cannot be accessed from outside the package.
Public: The access level of a public modifier is everywhere. It can be accessed from within the class, outside the class, within the package and outside the package.
There are many non-access modifiers, such as static, abstract, synchronized, native, volatile, transient, etc. Here, we are going to learn the access modifiers only.
Private access modifier
Role of private constructor
Default access modifier
Protected access modifier
Public access modifier
Access Modifier with Method Overriding
1) Private
The private access modifier is accessible only within the class.
we have created two classes A and Simple. A class contains private data member and private method. We are accessing these private members from outside the class, so there is a compile-time error.
2) Default
If you don't use any modifier, it is treated as default by default. The default modifier is accessible only within package. It cannot be accessed from outside the package. It provides more accessibility than private. But, it is more restrictive than protected, and public.
3) Protected
The protected access modifier is accessible within package and outside the package but through inheritance only.
The protected access modifier can be applied on the data member, method and constructor. It can't be applied on the class.
It provides more accessibility than the default modifier.
4) Public
The public access modifier is accessible everywhere. It has the widest scope among all other modifiers.
As the name suggests access modifiers in Java helps to restrict the scope of a class, constructor, variable, method, or data member. In Java, access modifiers are used to set the accessibility (visibility) of classes, interfaces, variables, methods, constructors, data members, and the setter methods.
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