The terms foobar, foo, bar, baz, and others are used as metasyntactic variables and placeholder names in computer programming or computer-related documentation. They have been used to name entities such as variables, functions, and commands whose exact identity is unimportant and serve only to demonstrate a concept.

What do foo and bar mean?

In the world of computer programming, "foo" and "bar" are commonly used as generic examples of the names of files, users, programs, classes, hosts, etc. ... Foobar, in turn, may be related to FUBAR, the acronym for a less polite version of "Fouled Up Beyond All Recognition" (or "Repair").

What is foo bar in Java?

Foo (pronounced FOO) is a term used by programmers as a placeholder for a value that can change, depending on conditions or on information passed to the program. Foo and other words like it are formally known as metasyntactic variables.