For the enterprise, Java and Microsoft's .NET rule. However, Java has the edge, as it is No. 1 language in terms of number of developers. According to Evans Data, there are more than 9 million Java developers in the world. That means there are tons of Java applications out there that will have to be supported, updated and maintained. Furthermore, Java is the language of the Android mobile operating system. Android provides the tools and APIs necessary to begin developing applications for the Android OS using the Java programming language. Java ranks No. 1 on the TIOBE Programming Community Index for June 2010 (after a brief stint at No. 2, behind C, in May). The need for Java developers to build new Java applications is not about to wane.
3.C / C++
Like the BASIC programming language, Visual Basic was designed to be easily learned and used by beginner programmers. The language not only allows programmers to create simple GUI applications, but it can also be used to develop complex applications. Programming in VB is a combination of visually arranging components or controls on a form specifying attributes and actions of those components, and writing additional lines of code for more functionality. With ease of use as a selling point, Visual Basic caught on like wildfire. There is simply too much VB code out there to ignore this language in any list of 10 programming languages.
Many say Perl is the new COBOL. Perl is also viewed as "the duct tape of the Internet" and is used to integrate databases and other systems together. While demand for the dynamic or scripting languages such as Perl, Python, PHP and Ruby lags behind that of Java and more mainstream languages, the popularity of these languages is growing and there is a need for programmers in each of those communities. However, according to Indeed.com, the demand for Perl programmers is tracking higher than that for PHP, Python and Ruby developers, in that order
Want to work on the leading edge and build applications for the cloud? Dynamic languages, especially Python, are being used to create Web/cloud applications on frameworks such as Django. Google App Engine is built with Python and originally only supported Python. The advantage of Perl and Python over PHP among the dynamic languages is that while PHP is a Web-only, server-side language, Perl and Python are both general purpose languages with usage in multiple industries, from aerospace and defense to sciences and to financial to hi-tech.