Java is a high-level, class-based, object-oriented programming language that is designed to have as few implementation dependencies as possible. It is a general-purpose programming language intended to let programmers write once, run anywhere (WORA), meaning that compiled Java code can run on all platforms that support Java without the need to recompile. Java applications are typically compiled to bytecode that can run on any Java virtual machine (JVM) regardless of the underlying computer architecture. The syntax of Java is similar to C and C++, but has fewer low-level facilities than either of them. The Java runtime provides dynamic capabilities (such as reflection and runtime code modification) that are typically not available in traditional compiled languages. As of 2019, Java was one of the most popular programming languages in use according to GitHub, particularly for client–server web applications, with a reported 9 million developers.
Java was originally developed by James Gosling at Sun Microsystems and released in May 1995 as a core component of Sun Microsystems' Java platform. The original and reference implementation Java compilers, virtual machines, and class libraries were originally released by Sun under proprietary licenses. As of May 2007, in compliance with the specifications of the Java Community Process, Sun had relicensed most of its Java technologies under the GPL-2.0-only license. Oracle offers its own HotSpot Java Virtual Machine, however the official reference implementation is the OpenJDK JVM which is free open-source software and used by most developers and is the default JVM for almost all Linux distributions.
As of March 2022, Java 18 is the latest version, while Java 17, 11 and 8 are the current long-term support (LTS) versions. Oracle released the last zero-cost public update for the legacy version Java 8 LTS in January 2019 for commercial use, although it will otherwise still support Java 8 with public updates for personal use indefinitely. Other vendors have begun to offer zero-cost builds of OpenJDK 18 and 8, 11 and 17 that are still receiving security and other upgrades.
Oracle (and others) highly recommend uninstalling outdated and unsupported versions of Java, due to unresolved security issues in older versions. Oracle advises its users to immediately transition to a supported version, such as one of the LTS versions (8, 11, 17).
Reference: WIKIPEDIA
1495 questions
Is there a way to write XMLGregorianCalendar with java.util.Date?
Can we selectively give parameters in Java?What I'm saying is that I can give you parameters, I can give you an int, I can give you a string, so that it's processedIs it possible to do that?
Is there a way to save String as a text file in Java?
What is the difference between JDK and JRE? What role do you have and what should I use?
I want to record the time when the user starts my program using System.currentTimeMillis(). I want to express the recorded time in XX hours XX minutes, XX seconds or XX minutes, XX seconds anyway, how...
I want to change java.io.File to byte[] how do I do it?
Map<String,String> test = new HashMap<String, String>{test:test,test:test};Is there a way to initialize HashMap like the code above? Is the code above grammatically correct?
I'm making a program When the program is running, it's like Unix or Windows I want to know the operating system of the host, is this possible? Isn't there a 100% reliable way?
Someone asked me a question, and when I initialized a large amount of int,What's the difference if you have?
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