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Do not use multiple identifiers that vary by only one or more visually similar characters. Also, make the initial portions of long identifiers distinct to aid recognition.
Use L, not l, to clarify programmer intent when indicating that an integer literal is of type long.
According to the Java Language Specification, §3.10.1, "Integer Literals" [JLS 2011],
An integer literal is of type long if it is suffixed with an ASCII letter L or l (ell); otherwise, it is of type int. The suffix L is preferred because the letter l (ell) is often hard to distinguish from the digit 1 (one).
According to §3.10.1, "Integer Literals," of the Java Language Specification [JLS 2011],
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