Java

 Package in Java Package is a group of similar types of classes, interfaces and sub-packages. Packages can be built-in or user defined. Built-in packages - java, util, io etc. import java . util . Scanner ; import java . io . IOException ; Access Modifiers in Java 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. package newpackage ;   class Account { ...