final class BigInt extends ScalaNumber with ScalaNumericConversions with Serializable with Ordered[BigInt]
A type with efficient encoding of arbitrary integers.
It wraps java.math.BigInteger
, with optimization for small values that can be encoded in a Long
.
- Source
- BigInt.scala
- Alphabetic
- By Inheritance
- BigInt
- Ordered
- Comparable
- ScalaNumericConversions
- ScalaNumericAnyConversions
- ScalaNumber
- Number
- Serializable
- AnyRef
- Any
- by orderingToOrdered
- by any2stringadd
- by StringFormat
- by Ensuring
- by ArrowAssoc
- Hide All
- Show All
- Public
- Protected
Instance Constructors
- new BigInt(bigInteger: BigInteger)
Public constructor present for compatibility.
Public constructor present for compatibility. Use the BigInt.apply companion object method instead.
Value Members
- final def !=(arg0: Any): Boolean
Test two objects for inequality.
Test two objects for inequality.
- returns
true
if !(this == that), false otherwise.
- Definition Classes
- AnyRef → Any
- final def ##: Int
Equivalent to
x.hashCode
except for boxed numeric types andnull
.Equivalent to
x.hashCode
except for boxed numeric types andnull
. For numerics, it returns a hash value which is consistent with value equality: if two value type instances compare as true, then ## will produce the same hash value for each of them. Fornull
returns a hashcode wherenull.hashCode
throws aNullPointerException
.- returns
a hash value consistent with ==
- Definition Classes
- AnyRef → Any
- def %(that: BigInt): BigInt
Remainder of BigInts
- def &(that: BigInt): BigInt
Bitwise and of BigInts
- def &~(that: BigInt): BigInt
Bitwise and-not of BigInts.
Bitwise and-not of BigInts. Returns a BigInt whose value is (this & ~that).
- def *(that: BigInt): BigInt
Multiplication of BigInts
- def +(that: BigInt): BigInt
Addition of BigInts
- def -(that: BigInt): BigInt
Subtraction of BigInts
- def ->[B](y: B): (BigInt, B)
- Implicit
- This member is added by an implicit conversion from BigInt toArrowAssoc[BigInt] performed by method ArrowAssoc in scala.Predef.
- Definition Classes
- ArrowAssoc
- Annotations
- @inline()
- def /(that: BigInt): BigInt
Division of BigInts
- def /%(that: BigInt): (BigInt, BigInt)
Returns a pair of two BigInts containing (this / that) and (this % that).
- def <(that: BigInt): Boolean
Returns true if
this
is less thanthat
Returns true if
this
is less thanthat
- Definition Classes
- Ordered
- def <<(n: Int): BigInt
Leftshift of BigInt
- def <=(that: BigInt): Boolean
Returns true if
this
is less than or equal tothat
.Returns true if
this
is less than or equal tothat
.- Definition Classes
- Ordered
- final def ==(arg0: Any): Boolean
The expression
x == that
is equivalent toif (x eq null) that eq null else x.equals(that)
.The expression
x == that
is equivalent toif (x eq null) that eq null else x.equals(that)
.- returns
true
if the receiver object is equivalent to the argument;false
otherwise.
- Definition Classes
- AnyRef → Any
- def >(that: BigInt): Boolean
Returns true if
this
is greater thanthat
.Returns true if
this
is greater thanthat
.- Definition Classes
- Ordered
- def >=(that: BigInt): Boolean
Returns true if
this
is greater than or equal tothat
.Returns true if
this
is greater than or equal tothat
.- Definition Classes
- Ordered
- def >>(n: Int): BigInt
(Signed) rightshift of BigInt
- def ^(that: BigInt): BigInt
Bitwise exclusive-or of BigInts
- def abs: BigInt
Returns the absolute value of this BigInt
- final def asInstanceOf[T0]: T0
Forces the compiler to treat the receiver object as having type
T0
, even though doing so may violate type safety.Forces the compiler to treat the receiver object as having type
T0
, even though doing so may violate type safety.This method is useful when you believe you have type information the compiler doesn't, and it also isn't possible to check the type at runtime. In such situations, skipping type safety is the only option.
It is platform dependent whether
asInstanceOf
has any effect at runtime. It might do a runtime type test on the erasure ofT0
, insert a conversion (such as boxing/unboxing), fill in a default value, or do nothing at all.In particular,
asInstanceOf
is not a type test. It does **not** mean:this match { case x: T0 => x case _ => throw ClassCastException("...")
Use pattern matching or isInstanceOf for type testing instead.
Situations where
asInstanceOf
is useful:- when flow analysis fails to deduce
T0
automatically - when down-casting a type parameter or an abstract type member (which cannot be checked at runtime due to type erasure) If there is any doubt and you are able to type test instead, you should do so.
Be careful of using
asInstanceOf
whenT0
is a primitive type. WhenT0
is primitive,asInstanceOf
may insert a conversion instead of a type test. If your intent is to convert, use atoT
method (x.toChar
,x.toByte
, etc.).- returns
the receiver object.
- Definition Classes
- Any
- Exceptions thrown
ClassCastException
if the receiver is not an instance of the erasure ofT0
, if that can be checked on this platform
- when flow analysis fails to deduce
- def bigInteger: BigInteger
- def bitCount: Int
Returns the number of bits in the two's complement representation of this BigInt that differ from its sign bit.
- def bitLength: Int
Returns the number of bits in the minimal two's-complement representation of this BigInt, excluding a sign bit.
- def byteValue: Byte
Converts this BigInt to a byte.
Converts this BigInt to a byte. If the BigInt is too big to fit in a byte, only the low-order 8 bits are returned. Note that this conversion can lose information about the overall magnitude of the BigInt value as well as return a result with the opposite sign.
- Definition Classes
- BigInt → ScalaNumericAnyConversions → Number
- def charValue: Char
Converts this BigInt to a char.
Converts this BigInt to a char. If the BigInt is too big to fit in a char, only the low-order 16 bits are returned. Note that this conversion can lose information about the overall magnitude of the BigInt value and that it always returns a positive result.
- def clearBit(n: Int): BigInt
Returns a BigInt whose value is equivalent to this BigInt with the designated bit cleared.
- def clone(): AnyRef
Create a copy of the receiver object.
Create a copy of the receiver object.
The default implementation of the
clone
method is platform dependent.- returns
a copy of the receiver object.
- def compare(that: BigInt): Int
Compares this BigInt with the specified BigInt
- def compareTo(that: BigInt): Int
Result of comparing
this
with operandthat
.Result of comparing
this
with operandthat
.- Definition Classes
- Ordered → Comparable
- def doubleValue: Double
Converts this
BigInt
to adouble
.Converts this
BigInt
to adouble
. if thisBigInt
has too great a magnitude to represent as a double, it will be converted toDouble.NEGATIVE_INFINITY
orDouble.POSITIVE_INFINITY
as appropriate.- Definition Classes
- BigInt → ScalaNumericAnyConversions → Number
- def ensuring(cond: (BigInt) => Boolean, msg: => Any): BigInt
- Implicit
- This member is added by an implicit conversion from BigInt toEnsuring[BigInt] performed by method Ensuring in scala.Predef.
- Definition Classes
- Ensuring
- def ensuring(cond: (BigInt) => Boolean): BigInt
- Implicit
- This member is added by an implicit conversion from BigInt toEnsuring[BigInt] performed by method Ensuring in scala.Predef.
- Definition Classes
- Ensuring
- def ensuring(cond: Boolean, msg: => Any): BigInt
- Implicit
- This member is added by an implicit conversion from BigInt toEnsuring[BigInt] performed by method Ensuring in scala.Predef.
- Definition Classes
- Ensuring
- def ensuring(cond: Boolean): BigInt
- Implicit
- This member is added by an implicit conversion from BigInt toEnsuring[BigInt] performed by method Ensuring in scala.Predef.
- Definition Classes
- Ensuring
- final def eq(arg0: AnyRef): Boolean
Tests whether the argument (
that
) is a reference to the receiver object (this
).Tests whether the argument (
that
) is a reference to the receiver object (this
).The
eq
method implements an equivalence relation on non-null instances ofAnyRef
, and has three additional properties:- It is consistent: for any non-null instances
x
andy
of typeAnyRef
, multiple invocations ofx.eq(y)
consistently returnstrue
or consistently returnsfalse
. - For any non-null instance
x
of typeAnyRef
,x.eq(null)
andnull.eq(x)
returnsfalse
. null.eq(null)
returnstrue
.
When overriding the
equals
orhashCode
methods, it is important to ensure that their behavior is consistent with reference equality. Therefore, if two objects are references to each other (o1 eq o2
), they should be equal to each other (o1 == o2
) and they should hash to the same value (o1.hashCode == o2.hashCode
).- returns
true
if the argument is a reference to the receiver object;false
otherwise.
- Definition Classes
- AnyRef
- It is consistent: for any non-null instances
- def equals(that: BigInt): Boolean
Compares this BigInt with the specified BigInt for equality.
- def equals(that: Any): Boolean
Compares this BigInt with the specified value for equality.
- def finalize(): Unit
Called by the garbage collector on the receiver object when there are no more references to the object.
Called by the garbage collector on the receiver object when there are no more references to the object.
The details of when and if the
finalize
method is invoked, as well as the interaction betweenfinalize
and non-local returns and exceptions, are all platform dependent.- Attributes
- protected[lang]
- Definition Classes
- AnyRef
- Annotations
- @throws(classOf[java.lang.Throwable])
- Note
not specified by SLS as a member of AnyRef
- def flipBit(n: Int): BigInt
Returns a BigInt whose value is equivalent to this BigInt with the designated bit flipped.
- def floatValue: Float
Converts this
BigInt
to afloat
.Converts this
BigInt
to afloat
. If thisBigInt
has too great a magnitude to represent as a float, it will be converted toFloat.NEGATIVE_INFINITY
orFloat.POSITIVE_INFINITY
as appropriate.- Definition Classes
- BigInt → ScalaNumericAnyConversions → Number
- def gcd(that: BigInt): BigInt
Returns the greatest common divisor of abs(this) and abs(that)
- final def getClass(): Class[_ <: AnyRef]
Returns the runtime class representation of the object.
- def hashCode(): Int
Returns the hash code for this BigInt.
- def intValue: Int
Converts this BigInt to an int.
Converts this BigInt to an int. If the BigInt is too big to fit in an int, only the low-order 32 bits are returned. Note that this conversion can lose information about the overall magnitude of the BigInt value as well as return a result with the opposite sign.
- Definition Classes
- BigInt → ScalaNumericAnyConversions → Number
- final def isInstanceOf[T0]: Boolean
Test whether the dynamic type of the receiver object has the same erasure as
T0
.Test whether the dynamic type of the receiver object has the same erasure as
T0
.Depending on what
T0
is, the test is done in one of the below ways:T0
is a non-parameterized class type, e.g.BigDecimal
: this method returnstrue
if the value of the receiver object is aBigDecimal
or a subtype ofBigDecimal
.T0
is a parameterized class type, e.g.List[Int]
: this method returnstrue
if the value of the receiver object is someList[X]
for anyX
. For example,List(1, 2, 3).isInstanceOf[List[String]]
will return true.T0
is some singleton typex.type
or literalx
: this method returnsthis.eq(x)
. For example,x.isInstanceOf[1]
is equivalent tox.eq(1)
T0
is an intersectionX with Y
orX & Y: this method is equivalent to
x.isInstanceOf[X] && x.isInstanceOf[Y]T0
is a unionX | Y
: this method is equivalent tox.isInstanceOf[X] || x.isInstanceOf[Y]
T0
is a type parameter or an abstract type member: this method is equivalent toisInstanceOf[U]
whereU
isT0
's upper bound,Any
ifT0
is unbounded. For example,x.isInstanceOf[A]
whereA
is an unbounded type parameter will return true for any value ofx
.
This is exactly equivalent to the type pattern
_: T0
- returns
true
if the receiver object is an instance of erasure of typeT0
;false
otherwise.
- Definition Classes
- Any
- Note
due to the unexpectedness of
List(1, 2, 3).isInstanceOf[List[String]]
returning true andx.isInstanceOf[A]
whereA
is a type parameter or abstract member returning true, these forms issue a warning.
- def isProbablePrime(certainty: Int): Boolean
Returns true if this BigInt is probably prime, false if it's definitely composite.
Returns true if this BigInt is probably prime, false if it's definitely composite.
- certainty
a measure of the uncertainty that the caller is willing to tolerate: if the call returns true the probability that this BigInt is prime exceeds (1 - 1/2 ^ certainty). The execution time of this method is proportional to the value of this parameter.
- def isValidByte: Boolean
Returns
true
iff this has a zero fractional part, and is within the range of scala.Byte MinValue and MaxValue; otherwise returnsfalse
.Returns
true
iff this has a zero fractional part, and is within the range of scala.Byte MinValue and MaxValue; otherwise returnsfalse
.- Definition Classes
- BigInt → ScalaNumericAnyConversions
- def isValidChar: Boolean
Returns
true
iff this has a zero fractional part, and is within the range of scala.Char MinValue and MaxValue; otherwise returnsfalse
.Returns
true
iff this has a zero fractional part, and is within the range of scala.Char MinValue and MaxValue; otherwise returnsfalse
.- Definition Classes
- BigInt → ScalaNumericAnyConversions
- def isValidDouble: Boolean
Returns
true
iff this can be represented exactly by scala.Double; otherwise returnsfalse
. - def isValidFloat: Boolean
Returns
true
iff this can be represented exactly by scala.Float; otherwise returnsfalse
. - def isValidInt: Boolean
Returns
true
iff this has a zero fractional part, and is within the range of scala.Int MinValue and MaxValue; otherwise returnsfalse
.Returns
true
iff this has a zero fractional part, and is within the range of scala.Int MinValue and MaxValue; otherwise returnsfalse
.- Definition Classes
- BigInt → ScalaNumericAnyConversions
- def isValidLong: Boolean
- def isValidShort: Boolean
Returns
true
iff this has a zero fractional part, and is within the range of scala.Short MinValue and MaxValue; otherwise returnsfalse
.Returns
true
iff this has a zero fractional part, and is within the range of scala.Short MinValue and MaxValue; otherwise returnsfalse
.- Definition Classes
- BigInt → ScalaNumericAnyConversions
- def longValue: Long
Converts this BigInt to a long.
Converts this BigInt to a long. If the BigInt is too big to fit in a long, only the low-order 64 bits are returned. Note that this conversion can lose information about the overall magnitude of the BigInt value as well as return a result with the opposite sign.
- Definition Classes
- BigInt → ScalaNumericAnyConversions → Number
- def lowestSetBit: Int
Returns the index of the rightmost (lowest-order) one bit in this BigInt (the number of zero bits to the right of the rightmost one bit).
- def max(that: BigInt): BigInt
Returns the maximum of this and that
- def min(that: BigInt): BigInt
Returns the minimum of this and that
- def mod(that: BigInt): BigInt
Returns a BigInt whose value is (this mod that).
Returns a BigInt whose value is (this mod that). This method differs from
%
in that it always returns a non-negative BigInt.- that
A positive number
- def modInverse(m: BigInt): BigInt
Returns a BigInt whose value is (the inverse of this modulo m).
- def modPow(exp: BigInt, m: BigInt): BigInt
Returns a BigInt whose value is (this raised to the power of exp modulo m).
- final def ne(arg0: AnyRef): Boolean
Equivalent to
!(this eq that)
.Equivalent to
!(this eq that)
.- returns
true
if the argument is not a reference to the receiver object;false
otherwise.
- Definition Classes
- AnyRef
- final def notify(): Unit
Wakes up a single thread that is waiting on the receiver object's monitor.
Wakes up a single thread that is waiting on the receiver object's monitor.
- Definition Classes
- AnyRef
- Annotations
- @native()
- Note
not specified by SLS as a member of AnyRef
- final def notifyAll(): Unit
Wakes up all threads that are waiting on the receiver object's monitor.
Wakes up all threads that are waiting on the receiver object's monitor.
- Definition Classes
- AnyRef
- Annotations
- @native()
- Note
not specified by SLS as a member of AnyRef
- def pow(exp: Int): BigInt
Returns a BigInt whose value is (this raised to the power of exp).
- def setBit(n: Int): BigInt
Returns a BigInt whose value is equivalent to this BigInt with the designated bit set.
- def shortValue: Short
Converts this BigInt to a short.
Converts this BigInt to a short. If the BigInt is too big to fit in a short, only the low-order 16 bits are returned. Note that this conversion can lose information about the overall magnitude of the BigInt value as well as return a result with the opposite sign.
- Definition Classes
- BigInt → ScalaNumericAnyConversions → Number
- def sign: BigInt
Returns the sign of this BigInt; -1 if it is less than 0, +1 if it is greater than 0, 0 if it is equal to 0.
- def signum: Int
Returns the sign of this BigInt; -1 if it is less than 0, +1 if it is greater than 0, 0 if it is equal to 0.
- final def synchronized[T0](arg0: => T0): T0
Executes the code in
body
with an exclusive lock onthis
.Executes the code in
body
with an exclusive lock onthis
.- returns
the result of
body
- Definition Classes
- AnyRef
- def testBit(n: Int): Boolean
Returns true if and only if the designated bit is set.
- def to(end: BigInt, step: BigInt = BigInt(1)): Inclusive[BigInt]
Like until, but inclusive of the end value.
- def toByte: Byte
Returns the value of this as a scala.Byte.
Returns the value of this as a scala.Byte. This may involve rounding or truncation.
- Definition Classes
- ScalaNumericAnyConversions
- def toByteArray: Array[Byte]
Returns a byte array containing the two's-complement representation of this BigInt.
Returns a byte array containing the two's-complement representation of this BigInt. The byte array will be in big-endian byte-order: the most significant byte is in the zeroth element. The array will contain the minimum number of bytes required to represent this BigInt, including at least one sign bit.
- def toChar: Char
Returns the value of this as a scala.Char.
Returns the value of this as a scala.Char. This may involve rounding or truncation.
- Definition Classes
- ScalaNumericAnyConversions
- def toDouble: Double
Returns the value of this as a scala.Double.
Returns the value of this as a scala.Double. This may involve rounding or truncation.
- Definition Classes
- ScalaNumericAnyConversions
- def toFloat: Float
Returns the value of this as a scala.Float.
Returns the value of this as a scala.Float. This may involve rounding or truncation.
- Definition Classes
- ScalaNumericAnyConversions
- def toInt: Int
Returns the value of this as an scala.Int.
Returns the value of this as an scala.Int. This may involve rounding or truncation.
- Definition Classes
- ScalaNumericAnyConversions
- def toLong: Long
Returns the value of this as a scala.Long.
Returns the value of this as a scala.Long. This may involve rounding or truncation.
- Definition Classes
- ScalaNumericAnyConversions
- def toShort: Short
Returns the value of this as a scala.Short.
Returns the value of this as a scala.Short. This may involve rounding or truncation.
- Definition Classes
- ScalaNumericAnyConversions
- def toString(radix: Int): String
Returns the String representation in the specified radix of this BigInt.
- def toString(): String
Returns the decimal String representation of this BigInt.
- def unary_-: BigInt
Returns a BigInt whose value is the negation of this BigInt
- def unary_~: BigInt
Returns the bitwise complement of this BigInt
- def underlying(): BigInteger
- Definition Classes
- BigInt → ScalaNumericConversions → ScalaNumber
- def unifiedPrimitiveEquals(x: Any): Boolean
Should only be called after all known non-primitive types have been excluded.
Should only be called after all known non-primitive types have been excluded. This method won't dispatch anywhere else after checking against the primitives to avoid infinite recursion between equals and this on unknown "Number" variants.
Additionally, this should only be called if the numeric type is happy to be converted to Long, Float, and Double. If for instance a BigInt much larger than the Long range is sent here, it will claim equality with whatever Long is left in its lower 64 bits. Or a BigDecimal with more precision than Double can hold: same thing. There's no way given the interface available here to prevent this error.
- Attributes
- protected
- Definition Classes
- ScalaNumericAnyConversions
- def unifiedPrimitiveHashcode: Int
- Attributes
- protected
- Definition Classes
- ScalaNumericAnyConversions
- def until(end: BigInt, step: BigInt = BigInt(1)): Exclusive[BigInt]
Create a
NumericRange[BigInt]
in range[start;end)
with the specified step, where start is the target BigInt.Create a
NumericRange[BigInt]
in range[start;end)
with the specified step, where start is the target BigInt.- end
the end value of the range (exclusive)
- step
the distance between elements (defaults to 1)
- returns
the range
- final def wait(): Unit
See https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html#wait--.
- Definition Classes
- AnyRef
- Annotations
- @throws(classOf[java.lang.InterruptedException])
- Note
not specified by SLS as a member of AnyRef
- final def wait(arg0: Long, arg1: Int): Unit
See https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html#wait-long-int-
- Definition Classes
- AnyRef
- Annotations
- @throws(classOf[java.lang.InterruptedException])
- Note
not specified by SLS as a member of AnyRef
- final def wait(arg0: Long): Unit
See https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html#wait-long-.
- def |(that: BigInt): BigInt
Bitwise or of BigInts
Shadowed Implicit Value Members
- def +(other: String): String
- Implicit
- This member is added by an implicit conversion from BigInt toany2stringadd[BigInt] performed by method any2stringadd in scala.Predef.
- Shadowing
- This implicitly inherited member is shadowed by one or more members in this class.
To access this member you can use a type ascription:(bigInt: any2stringadd[BigInt]).+(other)
- Definition Classes
- any2stringadd
- def <(that: BigInt): Boolean
Returns true if
this
is less thanthat
Returns true if
this
is less thanthat
- Implicit
- This member is added by an implicit conversion from BigInt toOrdered[BigInt] performed by method orderingToOrdered in scala.math.Ordered.
- Shadowing
- This implicitly inherited member is shadowed by one or more members in this class.
To access this member you can use a type ascription:(bigInt: Ordered[BigInt]).<(that)
- Definition Classes
- Ordered
- def <=(that: BigInt): Boolean
Returns true if
this
is less than or equal tothat
.Returns true if
this
is less than or equal tothat
.- Implicit
- This member is added by an implicit conversion from BigInt toOrdered[BigInt] performed by method orderingToOrdered in scala.math.Ordered.
- Shadowing
- This implicitly inherited member is shadowed by one or more members in this class.
To access this member you can use a type ascription:(bigInt: Ordered[BigInt]).<=(that)
- Definition Classes
- Ordered
- def >(that: BigInt): Boolean
Returns true if
this
is greater thanthat
.Returns true if
this
is greater thanthat
.- Implicit
- This member is added by an implicit conversion from BigInt toOrdered[BigInt] performed by method orderingToOrdered in scala.math.Ordered.
- Shadowing
- This implicitly inherited member is shadowed by one or more members in this class.
To access this member you can use a type ascription:(bigInt: Ordered[BigInt]).>(that)
- Definition Classes
- Ordered
- def >=(that: BigInt): Boolean
Returns true if
this
is greater than or equal tothat
.Returns true if
this
is greater than or equal tothat
.- Implicit
- This member is added by an implicit conversion from BigInt toOrdered[BigInt] performed by method orderingToOrdered in scala.math.Ordered.
- Shadowing
- This implicitly inherited member is shadowed by one or more members in this class.
To access this member you can use a type ascription:(bigInt: Ordered[BigInt]).>=(that)
- Definition Classes
- Ordered
- def compare(that: BigInt): Int
Result of comparing
this
with operandthat
.Result of comparing
this
with operandthat
.Implement this method to determine how instances of A will be sorted.
Returns
x
where:x < 0
whenthis < that
x == 0
whenthis == that
x > 0
whenthis > that
- Implicit
- This member is added by an implicit conversion from BigInt toOrdered[BigInt] performed by method orderingToOrdered in scala.math.Ordered.
- Shadowing
- This implicitly inherited member is shadowed by one or more members in this class.
To access this member you can use a type ascription:(bigInt: Ordered[BigInt]).compare(that)
- Definition Classes
- Ordered
- def compareTo(that: BigInt): Int
Result of comparing
this
with operandthat
.Result of comparing
this
with operandthat
.- Implicit
- This member is added by an implicit conversion from BigInt toOrdered[BigInt] performed by method orderingToOrdered in scala.math.Ordered.
- Shadowing
- This implicitly inherited member is shadowed by one or more members in this class.
To access this member you can use a type ascription:(bigInt: Ordered[BigInt]).compareTo(that)
- Definition Classes
- Ordered → Comparable
Deprecated Value Members
- def formatted(fmtstr: String): String
Returns string formatted according to given
format
string.Returns string formatted according to given
format
string. Format strings are as forString.format
(@see java.lang.String.format).- Implicit
- This member is added by an implicit conversion from BigInt toStringFormat[BigInt] performed by method StringFormat in scala.Predef.
- Definition Classes
- StringFormat
- Annotations
- @deprecated @inline()
- Deprecated
(Since version 2.12.16) Use
formatString.format(value)
instead ofvalue.formatted(formatString)
, or use thef""
string interpolator. In Java 15 and later,formatted
resolves to the new method in String which has reversed parameters.
- def isWhole: Boolean
- returns
true
if this number has no decimal component,false
otherwise.
- Definition Classes
- BigInt → ScalaNumericAnyConversions → ScalaNumber
- Annotations
- @deprecated
- Deprecated
(Since version 2.12.15) isWhole on an integer type is always true
- def →[B](y: B): (BigInt, B)
- Implicit
- This member is added by an implicit conversion from BigInt toArrowAssoc[BigInt] performed by method ArrowAssoc in scala.Predef.
- Definition Classes
- ArrowAssoc
- Annotations
- @deprecated
- Deprecated
(Since version 2.13.0) Use
->
instead. If you still wish to display it as one character, consider using a font with programming ligatures such as Fira Code.
This is the documentation for the Scala standard library.
Package structure
The scala package contains core types like
Int
,Float
,Array
orOption
which are accessible in all Scala compilation units without explicit qualification or imports.Notable packages include:
scala.collection
and its sub-packages contain Scala's collections frameworkscala.collection.immutable
- Immutable, sequential data-structures such asVector
,List
,Range
,HashMap
orHashSet
scala.collection.mutable
- Mutable, sequential data-structures such asArrayBuffer
,StringBuilder
,HashMap
orHashSet
scala.collection.concurrent
- Mutable, concurrent data-structures such asTrieMap
scala.concurrent
- Primitives for concurrent programming such asFutures
andPromises
scala.io
- Input and output operationsscala.math
- Basic math functions and additional numeric types likeBigInt
andBigDecimal
scala.sys
- Interaction with other processes and the operating systemscala.util.matching
- Regular expressionsOther packages exist. See the complete list on the right.
Additional parts of the standard library are shipped as separate libraries. These include:
scala.reflect
- Scala's reflection API (scala-reflect.jar)scala.xml
- XML parsing, manipulation, and serialization (scala-xml.jar)scala.collection.parallel
- Parallel collections (scala-parallel-collections.jar)scala.util.parsing
- Parser combinators (scala-parser-combinators.jar)scala.swing
- A convenient wrapper around Java's GUI framework called Swing (scala-swing.jar)Automatic imports
Identifiers in the scala package and the
scala.Predef
object are always in scope by default.Some of these identifiers are type aliases provided as shortcuts to commonly used classes. For example,
List
is an alias forscala.collection.immutable.List
.Other aliases refer to classes provided by the underlying platform. For example, on the JVM,
String
is an alias forjava.lang.String
.