Java
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| Java | |
|---|---|
| Name | Java |
| Paradigm | Object-oriented, Imperative, Functional |
| Designed by | James Gosling, Mike Sheridan, Patrick Naughton |
| Developed by | Oracle Corporation |
| First appeared | 1995 |
| Typing | Statically typed |
| Platform | Cross-platform |
| File extension | .java, .class, .jar |
| Website | Oracle Corporation |
Java is a high-level, object-oriented programming language developed by James Gosling, Mike Sheridan, and Patrick Naughton at Sun Microsystems, which was later acquired by Oracle Corporation. Java is known for its platform independence, allowing programs to run on any device that has a Java Virtual Machine (JVM) installed, including Windows, macOS, and Linux. This is achieved through the use of bytecode, which is executed by the JVM on the target platform, making Java a popular choice for developing large-scale applications, such as those used by Google, Amazon, and Microsoft. Java is also widely used in Android app development, with many developers using the Android Studio integrated development environment (IDE) to create apps for the Google Play Store.
Introduction
Java is designed to be simple, object-oriented, and familiar, with a syntax similar to C++ and C#. The language is based on the concept of objects and classes, which are used to represent real-world entities and their interactions. Java also supports multithreading, allowing programs to execute multiple threads of execution concurrently, which is useful for developing responsive and scalable applications, such as those used by Facebook, Twitter, and LinkedIn. Java developers often use Eclipse and NetBeans IDEs to write, compile, and debug their code, and may also use Maven and Gradle build tools to manage dependencies and automate the build process.
History
The development of Java began in 1991 at Sun Microsystems, with a team led by James Gosling and including Mike Sheridan and Patrick Naughton. The language was initially called Oak and was designed for use in embedded systems, such as those used in NASA and IBM. The first public release of Java was in 1995, and it quickly gained popularity as a platform for developing web applications, such as those used by Yahoo! and eBay. In 2009, Oracle Corporation acquired Sun Microsystems and took over the development of Java, which is now used by millions of developers worldwide, including those at Apple, Samsung, and Intel. Java has also been used in various NASA missions, including the Mars Curiosity Rover and the International Space Station.
Syntax_and_features
Java's syntax is based on C++ and C#, with a focus on simplicity and readability. The language supports a range of features, including encapsulation, inheritance, and polymorphism, which are used to define the behavior of objects and classes. Java also supports interfaces, which are used to define contracts between objects and classes, and generics, which are used to define reusable functions and classes, such as those used in the Apache Commons library. Java developers often use JavaDoc to document their code and make it easier to understand and maintain, and may also use JUnit and TestNG to write unit tests and ensure the quality of their code.
Platforms
Java can run on any platform that has a Java Virtual Machine (JVM) installed, including Windows, macOS, and Linux. The JVM provides a layer of abstraction between the Java code and the underlying platform, allowing Java programs to run without modification on any platform that supports the JVM. Java is also used in Android app development, where it is used to create apps that run on Android devices, such as those made by Samsung, Google, and Amazon. Java is also used in embedded systems, such as those used in automotive and industrial control systems, and is supported by companies like Siemens and General Electric.
Applications
Java is widely used in a range of applications, including web development, mobile app development, and enterprise software development. Java is used in many popular web applications, such as those used by Google, Amazon, and Facebook, and is also used in Android app development, where it is used to create apps that run on Android devices. Java is also used in enterprise software development, where it is used to create large-scale applications that run on mainframe computers and distributed systems, such as those used by IBM and Oracle Corporation. Java is also used in scientific computing, such as in the National Institutes of Health and the European Organization for Nuclear Research.
Security
Java has a strong focus on security, with a range of features designed to prevent common security threats, such as buffer overflows and SQL injection attacks. Java's sandbox model provides a secure environment for executing Java code, and the Java Virtual Machine (JVM) provides a layer of abstraction between the Java code and the underlying platform, making it difficult for attackers to access sensitive data. Java also supports encryption and digital signatures, which are used to protect data in transit and ensure the authenticity of Java code, and is compliant with various security standards, such as those set by the National Institute of Standards and Technology and the Payment Card Industry Security Standards Council. Java developers often use OWASP guidelines to ensure the security of their code and may also use Veracode and Checkmarx to identify and fix security vulnerabilities.