Java (software platform)
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| Java (software platform) | |
|---|---|
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| Name | Java |
| Developer | Sun Microsystems; Oracle Corporation |
| Released | 1995 |
| Latest release | Java SE 21 |
| Programming language | C, C++ |
| Operating system | Windows (operating system), macOS, Linux (operating system), Solaris (operating system) |
| License | GNU General Public License; proprietary components |
| Website | oracle.com/java |
Java (software platform) Java is a cross-platform software platform originally developed by Sun Microsystems and now stewarded by Oracle Corporation that enables development and deployment of applications across Windows (operating system), Linux (operating system), macOS, and embedded systems. It comprises a programming language, runtime environment, and rich class libraries used by organizations such as Google, Amazon (company), IBM, Oracle Corporation, and Apple Inc. in enterprise, web, and mobile contexts. Java influenced languages like C#, Scala (programming language), Kotlin, and Groovy (programming language) and ecosystems including Android (operating system), Apache Software Foundation, and the Eclipse Foundation.
History
Java originated at Sun Microsystems in the early 1990s under the leadership of James Gosling and colleagues within the Green Project, intersecting with organizations such as Netscape Communications Corporation and events like the dot-com boom. Key milestones include the 1995 public release, the 2006 licensing changes under GNU General Public License, and the 2010 acquisition of Sun by Oracle Corporation. Legal and industry episodes involved Google LLC and Oracle America, Inc. v. Google, Inc. litigation connected to Android, and standards work with bodies like JSR (Java Specification Request) within the Java Community Process. Java’s roadmap was shaped by influential releases, corporate governance changes, and contributions from companies including IBM, Red Hat, SAP SE, Intel, and Microsoft through tooling and platform integration.
Architecture and Components
The platform is layered around the Java Virtual Machine (JVM), a language specification, and the Java Class Library often distributed as the Java Platform, Standard Edition. Major components include the bytecode format, class loader subsystem, garbage collectors, and the Java Native Interface (JNI) used by projects at Apache Software Foundation and vendors like IBM. The class library architecture includes packages for networking, concurrency, I/O, security, and GUI frameworks such as AWT and Swing, which were used alongside toolkits from Oracle Corporation and community projects like JavaFX. The ecosystem integrates build systems and frameworks developed by organizations such as Apache Software Foundation (e.g., Apache Maven), the Eclipse Foundation (e.g., Eclipse IDE), and The Linux Foundation-hosted projects.
Editions and Versions
Java is distributed in multiple editions: Java Platform, Standard Edition (SE), Java Platform, Enterprise Edition (EE) later stewarded by the Eclipse Foundation as Jakarta EE, and Java Platform, Micro Edition (ME) for constrained devices. Vendor distributions include Oracle JDK, OpenJDK supported by Red Hat, AdoptOpenJDK contributors, and commercial builds by Amazon (company) (Corretto) and Azul Systems. Versioning progressed from Java 1.0 through major releases such as Java 5 with generics, Java 8 with lambdas, and long-term support (LTS) releases like Java 11 and Java 17, with community and corporate roadmaps involving OpenJDK governance and release cadence decisions influenced by Oracle Corporation and contributors like Brian Goetz and other JSR leads.
Language and API Features
The Java language specification emphasizes static typing, object orientation, and platform independence. Language features evolved to include generics, annotations, lambda expressions, modules introduced by Project Jigsaw, and records inspired by work from language designers and contributors affiliated with Oracle Corporation and the broader community. Core APIs cover collections, concurrency utilities, I/O, networking (HTTP client APIs), security (java.security), and XML/JSON processing used in stacks built by Spring Framework creators and enterprises like VMware, Inc. and Pivotal Software. Standard APIs interoperate with frameworks such as Spring Framework, Hibernate, Jakarta EE, and libraries produced by the Apache Software Foundation including Apache Tomcat and Apache HTTP Server.
Runtime Environment and JVM
The runtime environment centers on the JVM, which executes Java bytecode and provides services such as garbage collection, just-in-time (JIT) compilation, and runtime profiling. Implementations include HotSpot originally from Sun, OpenJ9 from Eclipse Foundation/IBM, and GraalVM from Oracle Corporation with ahead-of-time (AOT) compilation features. The runtime interfaces with operating systems supported by vendors like Red Hat and cloud providers such as Amazon Web Services and Microsoft Azure, and supports tooling for diagnosis and performance analysis created by teams at Oracle Corporation, JetBrains, and open-source communities.
Development Tools and Ecosystem
A rich tooling ecosystem surrounds Java: IDEs like Eclipse (software), IntelliJ IDEA, and NetBeans (software); build tools such as Apache Maven, Gradle, and Ant (software); continuous integration systems from Jenkins (software) and GitLab; and package and repository services like Maven Central and JFrog Artifactory. Commercial vendors and foundations including Oracle Corporation, Red Hat, JetBrains, Google, and the Apache Software Foundation shape libraries, frameworks, and certification programs that enterprises and academic institutions adopt.
Adoption and Use Cases
Java is widely used in enterprise applications for banking and finance by institutions including Goldman Sachs and JPMorgan Chase, in web services and APIs by technology firms such as Amazon (company) and eBay, in mobile via Android (operating system) ecosystems influenced by Google LLC, and in embedded systems across sectors represented by vendors like Siemens and Bosch. Scientific computing and big data frameworks such as Apache Hadoop and Apache Spark rely on Java and JVM languages, while cloud-native deployments integrate Java into platforms from Amazon Web Services, Microsoft Azure, and Google Cloud Platform. The platform’s longevity is reinforced by commercial support from Oracle Corporation, community stewardship via OpenJDK, and adoption by governments and universities worldwide.