posted 19 years ago
Octal is a base-8 number system.

The 8 digits used to create an octal representation are {0,1,2,3,4,5,6,7}.

Clearly, 8 is not permitted in an octal representation, hence, compile-time error.

Hexadecimal is a base-16 number system.

The 8 digits used to create a hexadecimal representation are {0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F}.

Clearly, both 1 and 0 are permitted in a hexadecimal representation, hence, no compile-time error.

Decimal is a base-10 number system.

The 10 digits used to create a decimal representation are {0,1,2,3,4,5,6,7,8,9}.

Binary is a base-2 number system.

The 2 digits used to create a binary representation are {0,1}.

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Tony Morris

Java Q&A (FAQ, Trivia)