What is Java?
This programming language was born in the year 1991 and was created by James Gosling, a computer scientist, while working at Sun Microsystems. Java was conceived to create applications for television receivers and embedded devices, although users have ended up using it for more general purposes.
No. In fact, the only thing the two languages share is the root of the name. The language JavaScript was later created in the mid-1990s by Brendan Eich of the Netscape company with the intention of adding interactivity to the web pages displayed in the Netscape Navigator browser. In addition to its origin, we can identify many differences between the two languages:
While JavaScript has traditionally been an interpreted language, Java is compiled. In other words, while JavaScript programs are text files that are interpreted as they are read and then executed; Java is compiled into a special file for a computer to read and execute.
Java is debugged in two phases and JavaScript in one. This means that when using Java, when we finish programming our code, if there are any syntax errors, the language itself will recognise them in order to correct them. Later on, we may be faced with errors of a different nature, such as logic errors. On the contrary, in JavaScript, all errors are debugged at the same time, so the process is usually more complicated.
Java is strongly typed, while JavaScript is not. This means that in the Java language, once variables are defined, they cannot be changed. However, in JavaScript the same variable can contain first a number, then a text, and then change again to contain a date or an object at the end. JavaScript gives us greater flexibility when writing code, but this can be a double-edged sword: if we do not have the necessary knowledge, or if we pay little attention to what we are writing, we can make different mistakes.
JavaScript has closures, Java has just incorporated them. Closure is a technique used to implement lexical scopes in a programming language with first-class functions. Thus, the closure performs the role of a "register" by containing a function inside.
Functions in JavaScript are always multi-argument, while in Java you have to indicate when they are.
JavaScript is standard, Java is not. In fact, control of this language resides with Oracle, a private company that makes whatever modifications it sees fit.
What is Java typically used for?
Programmers use this language for a variety of purposes, including productivity and utilities, as it is used in applications such as word processors or spreadsheets; entertainment, in different gaming platforms; in education, using it in tools, for example, that help with time management; in communication, creating the world's most famous instant messaging and chat applications thanks to this language; and in mobile applications.
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