How to compile classes in Package || Access Modifiers in Java #25: Java Tutorials

How to compile classes in Package || Access Modifiers in Java #25: Java Tutorials

In this easy learnings Java tutorial, we can learn the concepts Access Modifiers In Java, How To Compile Classes in Package, Java Access Modifiers With Example Program, Using private Keyword In Java For Access Control.

While making a package, you should opt for a reputation for the package and embrace a package statement at the side of that name at the highest of each supply file that contains the categories, interfaces, enumerations, and annotation types that you wish to incorporate within the package.

The package statement should be the 1st line within the supply file. There can be only 1 package statement in every supply file, and it applies to all types within the file.

If a package statement is not used then the category, interfaces, enumerations, and annotation types can be placed within the current default package.

The most strict level of access control allowed in Java is non-public. Any member variable or method marked as non-public can be solely accessible in this category. But we have a tendency to would possibly not want such a robust restriction all the time. So Java supports the alternative levels like default (no-modifier), protected, and public.

Please note that while non-public, protected and public are keywords, the default access level is NOT a keyword. If we do not place either non-public, protected or public before a member variable or method, then it is automatically thought of as default access level.
default (No Modifier) access level : If a variable or method is marked as default by not inserting any access intellect, then that variable or method will be solely accessed in this category, its same package sub-classes or in any other category happiness to identical package. But that variable or technique will not be accessed in an exceedingly sub-class or non-subclass happiness to a unique package.
protected access level : If a variable or method is marked as protected, then that variable or method will be solely accessed in this category, its sub-classes (same-package or different package) or in any alternative category happiness to identical package. That variable or method is solely not accessible in an exceedingly non-subclass happiness to a unique package.
public access level : If a variable or method is marked as public, then that variable or method is accessible all over. There is no restriction on its access.