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SLF4J. Simple Logging Facade for Java ( SLF4J) provides a Java logging API by means of a simple facade pattern. The underlying logging backend is determined at runtime by adding the desired binding to the classpath and may be the standard Sun Java logging package java.util.logging, [2] Log4j, Reload4j, Logback [3] or tinylog. [4] [5]
The assert keyword was implemented in Java for Java 1.4 [7] Other concepts were different from, or improved later, for Java: [4] Abstract methods were defined as in C++. While the Oak default access level was the same as Java's (default) package private access level, it was called "private". Oak did not have an equivalent to Java's private ...
Log4j. Apache Log4j is a Java -based logging utility originally written by Ceki Gülcü. It is part of the Apache Logging Services, a project of the Apache Software Foundation. Log4j is one of several Java logging frameworks . Gülcü has since created SLF4J, Reload4j, [ 4] and Logback [ 5][better source needed] which are alternatives to Log4j.
Jakarta Messaging. The Jakarta Messaging API (formerly Java Message Service or JMS API) is a Java application programming interface (API) for message-oriented middleware. It provides generic messaging models, able to handle the producer–consumer problem, that can be used to facilitate the sending and receiving of messages between software ...
A Java virtual machine ( JVM) is a virtual machine that enables a computer to run Java programs as well as programs written in other languages that are also compiled to Java bytecode. The JVM is detailed by a specification that formally describes what is required in a JVM implementation. Having a specification ensures interoperability of Java ...
Jakarta Server Pages ( JSP; formerly JavaServer Pages) [ 1] is a collection of technologies that helps software developers create dynamically generated web pages based on HTML, XML, SOAP, or other document types. Released in 1999 by Sun Microsystems, [ 2] JSP is similar to PHP and ASP, but uses the Java programming language .
Generics in Java. Generics are a facility of generic programming that were added to the Java programming language in 2004 within version J2SE 5.0. They were designed to extend Java's type system to allow "a type or method to operate on objects of various types while providing compile-time type safety". [ 1]
Java bytecode is used at runtime either interpreted by a JVM or compiled to machine code via just-in-time (JIT) compilation and run as a native application. As Java bytecode is designed for a cross-platform compatibility and security, a Java bytecode application tends to run consistently across various hardware and software configurations.