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This article mainly introduces the differences between javascript and java, has a certain reference value, interested friends can refer to, I hope you can learn a lot after reading this article, the following let the editor take you to understand it.

The differences between Java and JavaScript:

1. The use is different:

The most essential difference between them is their purpose: Java is widely used in PC, mobile, Internet, data center and so on.

JavaScript is mainly used to embed text into HTML pages, read and write HTML elements, control cookies, and so on.

two。 Come from different backgrounds:

Javascript and Java are different products developed by different companies. Javascript is the scripting language of Netscape.

Java is a new generation of object-oriented programming language developed by SUN Microsystems.

3. Embed in different ways:

In HTML documents, the identity of the two programming languages is different, which is used by Javascript, while Java is identified by Applet.

4. Different language types:

JavaScript is a dynamically typed language; Java is a statically typed language.

5. The variables taken are different:

Variable declarations in JavaScript are weakly typed, that is, variables do not need to be declared before they are used, but the interpreter checks their data types at run time. Java uses strongly typed variable checking, that is, all variables must be declared before compilation.

6. The code format is different:

Javascript code is dynamic, can be directly embedded in HTML documents, and can be dynamically loaded, writing HTML documents is as convenient as editing text files, and its independent file format is * .js. Java is an HTML-independent format that must be loaded as external media is referenced in HTML, its code is stored in a bytecode in a separate document, and its standalone file format is * .class.

Javascript uses dynamic binding, that is, object references to Javascript are checked at run time. Java uses static binding, that is, object references to Java must be done at compile time to enable the compiler to implement strong type checking.

Javascript does not manipulate text and graphics directly, it works with combinations of HTML elements in Web pages, but it controls the browser and allows browsers to process text and graphics directly. On the other hand, Java can manipulate text and graphics directly. 6.

What Java and JavaScript have in common:

Their syntax and C language are very similar; they are both object-oriented (though implemented slightly differently); JavaScript is designed with reference to Java's naming conventions; all in all, JavaScript is very different in language style except that it looks like Java. The objects that JavaScript refers to at design time do not include Java, but include languages such as Self and Scheme.

Java and JavaScript have their own strengths and specialties. The stage of Java is in the field of programming, while the advantage of JavaScript is that it is almost omnipotent in the Web page.

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