Class is contained in the java.lang package. Class Description Array Provides static methods to dynamically create and access arrays. Class Represents, or reflects, classes and interfaces. Constructor Provides information about, and access to, a constructor for a class. Allows you to instantiate a class dynamically.
Field Provides information about, and dynamic access to, a field of a class or an interface.
Method Provides information about, and access to, a single method on a class or interface. Allows you to invoke the method dynamically. Modifier Provides static methods and constants that allow you to get information about the access modifiers of a class and its members.