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java.lang.Objectcom.google.common.primitives.UnsignedInts
@Beta @GwtCompatible public final class UnsignedInts
Static utility methods pertaining to int primitives that interpret values as
unsigned (that is, any negative value x is treated as the positive value
2^32 + x). The methods for which signedness is not an issue are in Ints, as well
as signed versions of methods for which signedness is an issue.
In addition, this class provides several static methods for converting an int to a
String and a String to an int that treat the int as an unsigned
number.
Users of these utilities must be extremely careful not to mix up signed and unsigned
int values. When possible, it is recommended that the UnsignedInteger wrapper
class be used, at a small efficiency penalty, to enforce the distinction in the type system.
| Method Summary | |
|---|---|
static int |
compare(int a,
int b)
Compares the two specified int values, treating them as unsigned values between
0 and 2^32 - 1 inclusive. |
static int |
divide(int dividend,
int divisor)
Returns dividend / divisor, where the dividend and divisor are treated as unsigned 32-bit quantities. |
static String |
join(String separator,
int... array)
Returns a string containing the supplied unsigned int values separated by
separator. |
static Comparator<int[]> |
lexicographicalComparator()
Returns a comparator that compares two arrays of unsigned int values lexicographically. |
static int |
max(int... array)
Returns the greatest value present in array, treating values as unsigned. |
static int |
min(int... array)
Returns the least value present in array, treating values as unsigned. |
static int |
parseUnsignedInt(String s)
Returns the unsigned int value represented by the given decimal string. |
static int |
parseUnsignedInt(String string,
int radix)
Returns the unsigned int value represented by a string with the given radix. |
static int |
remainder(int dividend,
int divisor)
Returns dividend % divisor, where the dividend and divisor are treated as unsigned 32-bit quantities. |
static long |
toLong(int value)
Returns the value of the given int as a long, when treated as unsigned. |
static String |
toString(int x)
Returns a string representation of x, where x is treated as unsigned. |
static String |
toString(int x,
int radix)
Returns a string representation of x for the given radix, where x is treated
as unsigned. |
| Methods inherited from class java.lang.Object |
|---|
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
| Method Detail |
|---|
public static int compare(int a,
int b)
int values, treating them as unsigned values between
0 and 2^32 - 1 inclusive.
a - the first unsigned int to compareb - the second unsigned int to compare
a is less than b; a positive value if a is
greater than b; or zero if they are equalpublic static long toLong(int value)
int as a long, when treated as unsigned.
public static int min(int... array)
array, treating values as unsigned.
array - a nonempty array of unsigned int values
array that is less than or equal to every other value in
the array according to compare(int, int)
IllegalArgumentException - if array is emptypublic static int max(int... array)
array, treating values as unsigned.
array - a nonempty array of unsigned int values
array that is greater than or equal to every other value
in the array according to compare(int, int)
IllegalArgumentException - if array is empty
public static String join(String separator,
int... array)
int values separated by
separator. For example, join("-", 1, 2, 3) returns the string "1-2-3".
separator - the text that should appear between consecutive values in the resulting
string (but not at the start or end)array - an array of unsigned int values, possibly emptypublic static Comparator<int[]> lexicographicalComparator()
int values lexicographically.
That is, it compares, using compare(int, int)), the first pair of values that follow
any common prefix, or when one array is a prefix of the other, treats the shorter array as the
lesser. For example, [] < [1] < [1, 2] < [2] < [1 << 31].
The returned comparator is inconsistent with Object.equals(Object) (since arrays
support only identity equality), but it is consistent with Arrays.equals(int[], int[]).
public static int divide(int dividend,
int divisor)
dividend - the dividend (numerator)divisor - the divisor (denominator)
ArithmeticException - if divisor is 0
public static int remainder(int dividend,
int divisor)
dividend - the dividend (numerator)divisor - the divisor (denominator)
ArithmeticException - if divisor is 0public static int parseUnsignedInt(String s)
int value represented by the given decimal string.
NumberFormatException - if the string does not contain a valid unsigned integer, or if
the value represented is too large to fit in an unsigned int.
NullPointerException - if s is null
public static int parseUnsignedInt(String string,
int radix)
int value represented by a string with the given radix.
string - the string containing the unsigned integer representation to be parsed.radix - the radix to use while parsing s; must be between
Character.MIN_RADIX and Character.MAX_RADIX.
NumberFormatException - if the string does not contain a valid unsigned int, or
if supplied radix is invalid.public static String toString(int x)
public static String toString(int x,
int radix)
x for the given radix, where x is treated
as unsigned.
x - the value to convert to a string.radix - the radix to use while working with x
IllegalArgumentException - if radix is not between Character.MIN_RADIX
and Character.MAX_RADIX.
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