How are Decimal, Octal and Hexadecimal integer literals represented in Java?

Question :

How are Decimal, Octal and Hexadecimal integer literals represented in Java?

Decimal Integer Literals uses digits from 0 to 9 (i.e. 10 digits this is what you normally use to represent numbers in mathematics) but should not be prefixed with 0. + (or no symbol) or – may be used to represent positive or negative numbers respectively. Thus -12, 56, or +75 may be considered to be Decimal Integer Literal.

Octal Integer Literals uses digits from 0 to 7 (i.e. 8 digits) and should be prefixed with 0. + (or no symbol) or – may be used to represent positive or negative numbers respectively. Thus -012, 056, or +075 may be considered to be Octal Integer Literal.

Hexadecimal Integer Literals uses digits from 0 to 9 and alphabets from A (or a) to F (or f) representing 10 to 15 (i.e. 16 numbers) and should be prefixed with 0x or 0X. + (or no symbol) used to represent positive numbers or – may be used to represent negative numbers. Thus -0x12, 0X56, or +0A7F5 may be considered to be Hexadecimal Integer Literal.