What's going on with java and javascript?

In recent years, with the rapid development of Internet technology, people's demand for programming languages ​​is increasing. Among many programming languages, Java and JavaScript, two programming languages ​​with very similar but completely different names, often confuse beginners. So, what are the differences and connections between Java and JavaScript?

1. Source and History

Java and JavaScript come from different companies. The Java language was originally developed by James Gosling and others of Sun Company in the 1990s. It is a purely object-oriented programming language and is mainly used for server-side development; while JavaScript was created by Brendan Eich of Netscape Company in 1995. , originally named Mocha, later renamed LiveScript, and finally JavaScript as the official name, and has since been mainly used for Web front-end development.

2. Language Features

1. Java Language Features

Java is a statically typed, object-oriented, compiled language. It has many very powerful features, such as:

(1) Cross-platform: Java language uses a virtual machine (JVM) to run code, so the same program can run on different operating systems.

(2) Memory management: The Java language uses the garbage collection mechanism to automatically recycle memory that is no longer used, and there is no need to manually release the memory.

(3) Object-oriented: Java language is a purely object-oriented language that can realize object-oriented features such as inheritance, encapsulation, and polymorphism.

2.JavaScript language features

JavaScript is a dynamically typed, interpreted scripting language. It also has many powerful features, such as:

(1) Event-driven: JavaScript language is mainly used for Web front-end development and has the characteristics of responding to user operations.

(2) DOM operation: JavaScript can use the Document Object Model to operate HTML documents to achieve dynamic interaction.

(3) Functional programming: JavaScript can also implement functional programming, supporting concepts such as higher-order functions and closures.

3. Application fields

1. Java application fields

Java is widely used in enterprise-level application development, storing data on a large scale on the server side, processing logic, and also Commonly used in Android development, etc.

2. JavaScript application fields

JavaScript was originally a language used for Web front-end development. It is mainly used for web page dynamic effects, window pop-ups, browser detection and other functions. Now with the rise of Node.js, JavaScript is also beginning to be used for back-end development.

4. Language association

Java and JavaScript are not the same programming language, but they have some similar language features, such as:

(1) Similar syntax: Java There are similarities in syntax with JavaScript, such as variable declarations, loop structures, etc.

(2) Similar names: Java and JavaScript both have Java in their names. This may be because Netscape used such naming in order to gain popularity of the Java language at that time.

(3) Complement each other: JavaScript is mainly used for Web front-end, while Java is more used for back-end server development. The two languages ​​can complement each other in specific applications. Java can provide better performance, while JavaScript can achieve better Web dynamic effects.

Generally speaking, although Java and JavaScript have similarities in names and some basic syntax, they are actually two completely different programming languages ​​with different application fields. If you want to enter the server-side or Android development field, Java is an indispensable language; if you want to enter the Web front-end field, then JavaScript is a language that must be learned.

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