Java - Docs

Java is a popular programming language that is widely used for building a variety of applications, including web, mobile, and desktop applications. It is an object-oriented language, which means that it is based on the concept of objects, which can represent real-world entities and their attributes and behaviors.

Some key features of Java include:

Platform independence: Java code can run on any device or operating system that has a Java Virtual Machine (JVM) installed, which makes it a portable language.
Object-oriented programming: Java is an object-oriented language, which means that it is based on the concept of objects and their interactions. Objects can represent real-world entities and their attributes and behaviors, which makes it easier to model complex systems and solve problems.
Strong typing: Java is a strongly typed language, which means that every variable and constant must be explicitly defined with a type. This helps to prevent common programming errors, such as trying to add a string to an integer.
Concurrency: Java includes a number of features that make it easy to write concurrent and parallel programs, such as threads, locks, and atomic variables.
Security: Java is designed to be a secure language, with features such as type safety, memory management, and security manager to help prevent common security vulnerabilities.

Versions

Java 8, 11, and 17+ are different versions of the Java platform, and each version introduces new features, improvements, and security updates. Here are some key differences between these versions:

Java 8: This was a major release of the Java platform, and introduced a number of new features and improvements, such as the Lambda Expression, the Stream API, and the Date and Time API. Java 8 is no longer supported by Oracle, but it is still widely used in many organizations.
Java 11: This was a long-term support (LTS) release of the Java platform, and introduced a number of new features and improvements, such as the HTTP Client API, the ZGC garbage collector, and the Epsilon garbage collector. Java 11 also removed support for some older features that were deprecated in previous versions.
Java 17+: These are the most recent versions of the Java platform, and introduce a range of new features and improvements, such as enhanced support for containerization, new APIs for low-latency applications, and improved security and performance.

Installation

Amazon Corretto is a no-cost, multi-platform, production-ready distribution of the Open Java Development Kit (OpenJDK). It can be used to develop and run Java applications on your system.

To install Amazon Corretto on your system, follow these steps:

Go to the Amazon Corretto website at https://aws.amazon.com/corretto/.
Click on the "Download" button for the version of Amazon Corretto that you want to install.
Select the operating system and architecture that you want to install Amazon Corretto on.
Click on the "Download" button to download the Amazon Corretto installer.
Run the installer to install Amazon Corretto on your system.

Once the installation is complete, you can verify the installation by running the following command:

java -version

This should output the version number of Amazon Corretto that you have installed.