Search results
Results from the WOW.Com Content Network
An interface in the Java programming language is an abstract type that is used to declare a behavior that classes must implement. They are similar to protocols . Interfaces are declared using the interface keyword , and may only contain method signature and constant declarations (variable declarations that are declared to be both static and ...
For example, in Java, the Comparable interface specifies a method compareTo() which implementing classes must implement. This means that a sorting method, for example, can sort a collection of any objects of types which implement the Comparable interface, without having to know anything about the inner nature of the class (except that two of ...
An example of the application of marker interfaces from the Java programming language is the Serializable interface: package java.io ; public interface Serializable { } A class implements this interface to indicate that its non- transient data members can be written to an ObjectOutputStream .
This adapter pattern uses multiple polymorphic interfaces implementing or inheriting both the interface that is expected and the interface that is pre-existing. It is typical for the expected interface to be created as a pure interface class, especially in languages such as Java (before JDK 1.8) that do not support multiple inheritance of ...
Consider Example 2 below. Note that the Java libraries use constant interface pattern themselves. For example, the SwingConstants interface [2] was released in 1998, [3] and then it was a reasonable choice.
The codebase of the Eclipse IDE is an example of interface-based programming. Eclipse plugin vendors just have to develop components that satisfy the interface specified by the parent application vendor, the Eclipse Foundation. Indeed, in Eclipse, even the original components such as the Java Development Tools are themselves plugins.
In Java, several factories are used in the javax.xml.parsers package, such as javax.xml.parsers.DocumentBuilderFactory or javax.xml.parsers.SAXParserFactory. In the HTML5 DOM API, the Document interface contains a createElement() factory method for creating specific elements of the HTMLElement interface.
Complete article "Java Singleton Pattern Explained" Four different ways to implement singleton in Java "Ways to implement singleton in Java" Book extract: Implementing the Singleton Pattern in C# by Jon Skeet; Singleton at Microsoft patterns & practices Developer Center; IBM article "Double-checked locking and the Singleton pattern" by Peter Haggar