java tag

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Oracle (and others) highly recommend uninstalling outdated and unsupported versions of Java, due to unresolved security issues in older versions.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


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Problems during bubble sorting implementation using Java.

import java.util.Scanner;public class BubbleSort { public static void main(String[] args) { int inputNumber = 0, temp = 0; int[] bubbleArray = new int[5]; Scanner scanner = new Scanner(System.in); ...

2 years ago

1 answers
133 views
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I want to make a whole line of a sentence HTML

module.exports = { HTML:function(title, board, control){ return ` <!DOCTYPE html> <html> <head> <title>${title}</title> <meta charset=utf-8> <style type=text...


1 answers
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Java array. What's the difference between the two examples? Help me!

public class DefineDemo { public static void main(String[] args) { String[] classGroup = { Choi Jin-hyuk, Choi Yu-bin, Han Yi-ram, Going}; }}public class GetDemo { public static void main(String[] ar...

2 years ago

1 answers
116 views
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How do we determine if a particular value exists in an array?

Let's say we have an array of String[] with the following values.public static final String[] VALUES = new String[] {AB,BC,CD,AE};Given the strings, is there a good way to check if s is present in the...

2 years ago

1 answers
81 views
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I want to convert the String to ArrayList, and I want to add a comma part

Is there any method created in Java that separates the string into an array or list by comma?Or do I have to make the code myself?


1 answers
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I have a question for the Java event handler. Why isn't it working?ㅜㅜㅜ

import java.awt.*;import javax.swing.*;import java.awt.event.*;classMyFrame extensionsJFrame{//Frame Class private JButton b1; private JPanel panel; private JLabel label; private JTextField t1; privat...

2 years ago

1 answers
77 views
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I'd like to parse this site

Trying to parse this site I opened the Chrome developer tool and kept searching the network and source. I don't know what to doIs there a way to parse this site?Thank you^^

2 years ago

1 answers
117 views
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How do you define unsigned int in Java?

Is there a way to define unsigned int in Java? What does unsigned mean in Java?I'm looking at String.hashcode right now and I want to see the possibility of a 32-bit unsigned int crash here.

2 years ago

1 answers
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I want to know the difference between public default protected private!

Is there a rule like how to use public default when inheriting classes or interfaces?

2 years ago

1 answers
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What does Synchronized mean?

What does Synchronized mean?

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