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Oracle (and others) highly recommend uninstalling outdated and unsupported versions of Java, due to unresolved security issues in older versions.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
There's an error in writing down the two-dimensional array cedar coding in the book, but I can't find the reason.import java.util.*; public class Coderunner { public static void main(String[]args){ c...
void f(String[] first, String[] second) { String[] both = ??? }If you look at the source, there are String parameters first and second, and I want to combine these two.
import java.util.*;public class area {public static void main(String[] args) { // // TODO Auto-generated method stub double x,y,division; division=1; Scanner input = new Scanner(System.in); System.out...
I'd like to parse the above site to Java If you look at the source from Chrome to F12, you can see all the data. When I view the source of the web page, I can't see any data.Of course, even if I try t...
For example, int []a={1,2,3,4,5,5};->?->int []a={1,2,4,5,5}; to make it aThe third value is Is there a way to erase it?In that case, the size of the array can be assigned dynamically orI wonder ...
I heard that there is also a difference between char and char [] in Java, is that true?
public class MyClass { public static String getClassName() { String name = ???; // How can I return MyClass? return name; }}I want to create a static method that returns the name of the class like t...
I received the date in the form of yyyy-mm-dd. How can I add one more day to this?
I think it's right to ask Google, but I'm posting a question here because I'm curious about other people's opinions.The main development tool for Android is Java. I wonder why. I mean, isn't it too sl...
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