Java script is a programming language, used in the contents of html pages for enhancing the site functionality. Java script was elaborated by Netscape in cooperation with Sun Microsystems based on Sun’s Java. Java scripts are made at the customer side, however initially Liveware is a progenitor of java script, being a server programming language. Thus, with the help of JavaScript one can create beautiful and interactive web pages, which is impossible with standard html tags. Scripts are performed as a result of some events initiated by the user. It can be pointing of cursor, click etc. Java script helps you to create functional web pages.
Notably, Java Script and Java are two different programming languages. Java is an object oriented (OO) programming language, triggered merely by compiler and optional files. Such programs may operate as either complete application or embedded applets. Java scripts are embedded in html, however are stored at customer’s PC as separate files. It is no need to show differences between these languages. Just remember that Java Script and Java are not the same.
Thus, we found out that Java scripts are embedded in html page and cannot exist as separate programs, and function only when launched in browsers. This is the principle difference between Java Script language and any other programming language.
In particular, prompt and wide expansion of Java technology is connected with the fact it uses a new programming language, which was specifically created, a Java language. This language is created on the basis of Smalltalk, Pascal, C++ and other languages, using their best (in the judgment of the authors) features, and rejecting the worst ones. Opinions vary on that question, however it is indisputable that it is convenient in learning, programs written in it are easy to read and debug: the program can be written already within an hour from the start of learning. Java language becomes the language of learning object oriented programming, as well as Pascal language was the language of learning structured programming. Not in vain, a huge number of programs and class libraries are written in Java, whereas only lazybones does not write his applets.
To give a complete picture, it should me mentioned that not only Java language serves for creating applications for Java technology; new languages have already appeared; there are compilers from Pascal and C++ languages, however using Java language is the best choice; all aspects of the technology are set out herein simpler and easier. To the author’s humble opinion, Java language will be applied for description of various methods of OO programming; similarly, for realization of algorithms, Algol language was initially used, followed by Pascal.