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Why is JavaScript's scope smaller than Java's?

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2023-09-03 08:17:061447browse

JavaScript 的作用域为何比 Java 小?

Just like Java and JavaScript, these two programming languages ​​will inevitably compete with each other in the future. The name is the first step. As an extension of Java, JavaScript is destined to forever be confused, and often with Java. Since both Java and JavaScript have the word "Java" in their names, some believe they are related. Although they have some similarities, this is untrue as they differ in several ways.

Programmers use Java and JavaScript to get a variety of jobs done; neither is better than the other. While Java is a general-purpose language, JavaScript can be used to create animations and interactive web applications.

Java

Java is a widely used computer programming language that is concurrent, class-based, object-oriented, and specially designed for developing new software products at all stages. When programmers create Java applications, the generated code (sometimes called bytecode) goes on to execute on nearly every operating system (OS), including Windows, Linux, and Mac OS. The programming languages ​​C and C also provided inspiration for Java syntax. Java was created (accidentally) by James Gosling of Sun Microsystems. It is a computer language with statically typed data. Block level scope exists in Java.

JavaScript

JavaScript is a high-level programming language. It helps us expand our website pages on an ongoing basis. Many websites employ efficient JavaScript programs as plug-ins to enhance various web browsers. Additionally, we use it to develop mobile applications and improve games.

A client-side programming language called JavaScript is primarily used to obtain client permission. In other words, JavaScript may help make your website pages more attractive and smart. Brendan Eich created it in 1995 while working at Netscape.

Mocha is the original name for JavaScript; "live scripting" is its later moniker. However, under a licensing agreement between Netscape and Sun Microsystems (now Oracle), the name was changed to "JavaScript". Additionally, JavaScript has been submitted to ECMA for standardization.

Comparison between Java and JavaScript

Object-oriented programming (OOP)

Both Java and JavaScript follow object-oriented programming concepts, which require programmers to create code for objects in the context of each other. It shows that both languages ​​support key OOP concepts like abstraction, encapsulation, classes, inheritance, polymorphism, etc.

Libraries and Frameworks

Additionally, there are many libraries and frameworks for Java and JS thanks to a large development community and enterprise support. As a result, the development process may be sped up and made more straightforward for developers to use for a variety of scenarios and goals.

Utilization and Application

The main difference is how the two languages ​​are used and their functionality in the IT world. As readers may be aware, Java has many uses across various industries, including business solutions, Android development, embedded technology, big data, and more. On the other hand, the main goal of JavaScript is to increase user interaction on websites and other online pages. Even though creating various interactive parts for a website is a typical and required task, Java programming is undoubtedly much more thorough and all-encompassing.

Complexity and Learning Curve

But such widespread and widespread use comes at a price: Java may be considered a more difficult language to master compared to JavaScript. Data abstraction, encapsulation, inheritance, polymorphism, and other terms are just a few of the concepts and features included in the core parts of Java. Simply knowing them is not enough to start creating actual programs.

In contrast, JavaScript is said to be the easiest to learn of all contemporary programming languages. Strictly speaking, it's not even a programming language. Because it allows scripts to be embedded into web browsers that already have a built-in JavaScript engine to run JS code, JavaScript is essentially a scripting language.

Applications in front-end and back-end development

Another notable similarity between Java and JavaScript is that both languages ​​are used for front-end development, although JS is considered more of a front-end language. JavaScript code runs directly in current web browsers, is incorporated into HTML and enables the browser to perform various functions, while Java is primarily used on the front end in the form of applets.

However, they can both power the backend. Java, in particular, has traditionally been considered a back-end language, powering the server side of applications, websites, and numerous enterprise solutions. Most enterprises (more than 90%) use Java as their primary backend language. New technologies such as Node.js (JS runtime environment) allow JavaScript to run on the server side.

Java and JavaScript

Java is a modern object-oriented language. Since it is a general-purpose programming language, it can also be used for many different tasks, including creating desktop applications, back-end services, and many other tasks. Furthermore, it is cross-platform. Therefore, the same executable (with a compatible JVM) can be used by any operating system.

For website automation, JavaScript is used. It's a nightmare of terrible syntax and poor design choices, but almost all websites use it to some extent. JavaScript has been around for many years and is constantly being enhanced. These tweaks may have fixed its issues, but the creators kept them as "features." Over the years, many frameworks have been created to simplify working with JavaScript, but none have become the main standard.

in conclusion

Java is an older programming language and has built-in features that make work easy for developers. JavaScript is the language of the web and has several advantages over Java. Java is widely popular due to its ability to handle a wide range of different tasks and therefore has a wider scope than JavaScript.

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