LEXICAL STRUCTURE

Integer Literals

3.10.1

Note that octal numerals are always consist of two or more digits;

0

 is always

considered to be a decimal numeral not that it matters much in practice, for the

numerals

0

,

00

, and

0x0

 all represent exactly the same integer value.

The largest decimal literal of type

int

 is

2147483648

 (2

31

). All decimal liter 

als from

0

 to

2147483647

 may appear anywhere an

int

 literal may appear, but

the literal

2147483648

 may appear only as the operand of the unary negation

operator

.

The largest positive hexadecimal and octal literals of type

int

 are

0x7fffffff

 and

017777777777

, respectively, which equal

2147483647

(2

31

  1 ). The most negative hexadecimal and octal literals of type

int

 are

0x80000000

 and

020000000000

, respectively, each of which represents the deci 

mal value

 2147483648

 ( 2

31

). The hexadecimal and octal literals

0xffffffff

and

037777777777

, respectively, represent the decimal value

 1

.

See also

Integer.MIN_VALUE

 ( 20.7.1) and

Integer.MAX_VALUE

 ( 20.7.2).

A compile time error occurs if a decimal literal of type

int

 is larger than

2147483648

 (2

31

), or if the literal

2147483648

 appears anywhere other than as

the operand of the unary

 operator, or if a hexadecimal or octal

int

 literal does

not fit in 32 bits.

Examples of

int

 literals:

0

2

0372

0xDadaCafe

1996

0x00FF00FF

The largest decimal literal of type

long

 is

9223372036854775808L

(2

63

).

All decimal literals from

0L

 to

9223372036854775807L

 may appear anywhere a

long

 literal may appear, but the literal

9223372036854775808L

 may appear only

as the operand of the unary negation operator

.

The largest positive hexadecimal and octal literals of type

long

 are

0x7fffffffffffffffL

 and

0777777777777777777777L

, respectively, which

equal

9223372036854775807L

 ( 2

63

  1 ). The literals

0x8000000000000000L

and

01000000000000000000000L

 are the most negative

long

 hexadecimal and

octal literals, respectively. Each has the decimal value

  9223372036854775808L

( 2

63

). The hexadecimal and octal literals

0xffffffffffffffffL

 and

01777777777777777777777L

, respectively, represent the decimal value

 1L

.

See also

Long.MIN_VALUE

 ( 20.8.1) and

Long.MAX_VALUE

 ( 20.8.2).

A compile time error occurs if a decimal literal of type

long

 is larger than

9223372036854775808L

 (2

63

), or if the literal

9223372036854775808L

 appears

anywhere other than as the operand of the unary

 operator, or if a hexadecimal or

octal

long

 literal does not fit in 64 bits.

Examples of

long

 literals:

0l

0777L

0x100000000L

2147483648L

0xC0B0L

21