Search results
Results From The WOW.Com Content Network
Collection implementations in pre-JDK 1.2 versions of the Java platform included few data structure classes, but did not contain a collections framework. [4] The standard methods for grouping Java objects were via the array, the Vector, and the Hashtable classes, which unfortunately were not easy to extend, and did not implement a standard member interface.
In the Java programming language, the wildcard? is a special kind of type argument [1] that controls the type safety of the use of generic (parameterized) types. [2] It can be used in variable declarations and instantiations as well as in method definitions, but not in the definition of a generic type.
The Real-Time Specification for Java (RTSJ) is a set of interfaces and behavioral refinements that enable real-time computer programming in the Java programming language. RTSJ 1.0 was developed as JSR 1 under the Java Community Process, which approved the new standard in November, 2001. RTSJ 2.0 is being developed under JSR 282.
Collection classes are Java API-defined classes that can store objects in a manner similar to how data structures like arrays store primitive data types like int, double, long or char, etc., [2] but arrays store primitive data types while collections actually store objects. The primitive wrapper classes and their corresponding primitive types are:
More formally speaking, objects with generic type in Java are non-reifiable types. [6] A non-reifiable type is type whose representation at run-time has less information than its representation at compile-time. [6] Objects with generic type in Java are non-reifiable due to type erasure. [6] Java only enforces type information at compile-time.
/* This class has two type variables, T and V. T must be a subtype of ArrayList and implement Formattable interface */ public class Mapper < T extends ArrayList & Formattable, V > {public void add (T array, V item) {// array has add method because it is an ArrayList subclass array. add (item);}}
The Java NIO APIs are provided in the java.nio package and its subpackages. The documentation by Oracle identifies these features. Buffers for data of primitive types; Character set encoders and decoders; A pattern-matching facility based on Perl-style regular expressions (in package java.util.regex) Channels, a new primitive I/O abstraction
Static import is a feature introduced in the Java programming language that allows members (fields and methods) which have been scoped within their container class as public static, to be used in Java code without specifying the class in which the field has been defined.