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A Java package organizes Java classes into namespaces, [1] providing a unique namespace for each type it contains. Classes in the same package can access each other's package-private and protected members. In general, a package can contain the following kinds of types: classes, interfaces, enumerations, records and annotation types. A package ...
This package was added in J2SE 1.2. Java has an expressive system of references and allows for special behavior for garbage collection. A normal reference in Java is known as a "strong reference". The java.lang.ref package defines three other types of references—soft, weak, and phantom references. Each type of reference is designed for a ...
OSGi is built around a service-oriented architecture. Applications or components, come in the form of bundles for deployment, can be remotely installed, started, stopped, updated, and uninstalled without requiring a reboot. Management of Java packages/classes is specified in great detail.
As opposed to a personal computer, a server allows for a more consistent and available build environment. Traditionally, a build server was a local computer dedicated as a shared resource instead of used as a personal computer. Today, there are many cloud computing, software as a service (SaaS) web sites for building.
The platform was known as Java 2 Platform, Enterprise Edition or J2EE from version 1.2, until the name was changed to Java Platform, Enterprise Edition or Java EE in version 1.5. Java EE was maintained by Oracle under the Java Community Process. On September 12, 2017, Oracle Corporation announced that it would submit Java EE to the Eclipse ...
JBoss Enterprise Web Server (or JBoss EWS) This software is a platform for lightweight Java applications, but also handles large scale websites. [25] JBoss EWS may be deployed as a standard enterprise web server, a simple Java application server, or an enterprise open source application infrastructure. [26] Key components:
It provides a "pure Java" HTTP web server environment in which Java code can also run. Thus it is a Java web application server, although not a full JEE application server. Tomcat is developed and maintained by an open community of developers under the auspices of the Apache Software Foundation, released under the Apache License 2.0 license.
The EJB classes used by applications are included in the javax.ejb package. (The javax.ejb.spi package is a service provider interface used only by EJB container implementations.) Clients of EJBs do not instantiate those beans directly via Java's new operator, but instead have to obtain a reference via the EJB container.