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Does package contain class?
Example of package by import package.classname If you use fully qualified name then only declared class of this package will be accessible. It is generally used when two packages have same class name e.g. java.util and java.sql packages contain Date class.
What are the benefits of using packages in java?
Advantages of using Packages in Java
- Make easy searching or locating of classes and interfaces.
- Avoid naming conflicts.
- Implement data encapsulation (or data-hiding).
- Provide controlled access: The access specifiers protected and default have access control on package level.
What are packages used for?
Packages are used in Java in order to prevent naming conflicts, to control access, to make searching/locating and usage of classes, interfaces, enumerations and annotations easier, etc.
Do you have to put a package in a class?
No you don’t need to put in a package into your class UNLESS you are going to import it to another class that will be in it’s own file. This is where protected type variables come in when you don’t want to make them priviate but only want the subclasses (or child classes) access to them.
When do you use a package in Java?
Reusability: While developing a project in java, we often feel that there are few things that we are writing again and again in our code. Using packages, you can create such things in form of classes inside a package and whenever you need to perform that same task, just import that package and use the class.
Can a class have more than one package declaration?
A class can have only one package declaration but it can have more than one package import statements. For example: 4. The wild card import like package.* should be used carefully when working with subpackages. For example: Lets say: we have a package abc and inside that package we have another package foo, now foo is a subpackage.
Do you put a class in a package in NetBeans?
You never need to put a class in a package. However, it is almost always a good idea. This is something that Netbeans aggressively tries to encourage you to do. For small projects, using the default package (that is, a file without a package statement) is OK.