identifiers [JAVA]

Methods, Member variables, variables, classes etc have names in a programm. Those names are sometimes referred to as identifiers.

A valid identifier consists of letters, digits, underscores and currency symbols. The first character must not be a digit.

Here's a list of valid (legal) identifiers:

• counter_iteration
• amount$
• $value
• i_10
• süpör
• CaMeL

Here's a list of invalid identifiers:

• 22catch
• what-do-you-do
• c/o

Identifiers are case sensitive, so foo is not the same identifier as Foo