Most programming jobs list a variety of languages. That's because most real-world projects require a mix of tools. So, even if you see an ad for a Java programmer, SQL is probably in the mix.

Becoming popular in the early 1990s and the norm today, object-oriented programming (OOP) languages, such as C++ and Java, provide a formal set of rules for creating and managing objects.

Java compilers include the Java Programming Language Compiler (javac), the GNU Compiler for Java (GCJ), the Eclipse Compiler for Java (ECJ), and Jikes. Programmers typically write language statements ...