Identifiers

Identifiers start with a letter, and are followed by letters and digits.

Identifiers must not have the same spelling as keywords (like class, int, or this) or boolean literals (true or false) or null (not seen yet).

Letters are usually the lowercase and uppercase letters a to z and A to Z. Digits are 0 to 9.

For historical reasons, Java treats _ (underline) and $ as letters but they should be avoided (the $ is usually reserved to machine generated Java code).

Java accepts also letters from other alphabets within the Unicode, e.g. \"{Uberflu\ss{}} oder delta . But this is better avoided.

Two identifiers are considered identical if they consist of the same sequence of Unicode characters, i.e. FuelLog is different from fuelLog.

	Identifiers start with a letter, and are followed by letters and digits.
	Identifiers must not have the same spelling as keywords (like class, int, or this) or boolean literals (true or false) or null (not seen yet).
	Letters are usually the lowercase and uppercase letters a to z and A to Z. Digits are 0 to 9.
	For historical reasons, Java treats `_` (underline) and `$` as letters but they should be avoided (the `$` is usually reserved to machine generated Java code).
	Java accepts also letters from other alphabets within the Unicode, e.g. `\"{U`berflu\ss{}} oder . But this is better avoided.
	Two identifiers are considered identical if they consist of the same sequence of Unicode characters, i.e. `FuelLog` is different from `fuelLog`.