Packages

abstract final class Boolean extends AnyVal

Boolean (equivalent to Java's boolean primitive type) is a subtype of scala.AnyVal. Instances of Boolean are not represented by an object in the underlying runtime system.

There is an implicit conversion from scala.Boolean => scala.runtime.RichBoolean which provides useful non-primitive operations.

Source
Boolean.scala
Linear Supertypes
Ordering
  1. Alphabetic
  2. By Inheritance
Inherited
  1. Boolean
  2. AnyVal
  3. Any
Implicitly
  1. by boolean2Boolean
  2. by booleanWrapper
  3. by any2stringadd
  4. by StringFormat
  5. by Ensuring
  6. by ArrowAssoc
  1. Hide All
  2. Show All
Visibility
  1. Public
  2. All

Abstract Value Members

  1. abstract def !=(x: Boolean): Boolean

    Compares two Boolean expressions and returns true if they evaluate to a different value.

    Compares two Boolean expressions and returns true if they evaluate to a different value.

    a != b returns true if and only if

    • a is true and b is false or
    • a is false and b is true.
  2. abstract def &(x: Boolean): Boolean

    Compares two Boolean expressions and returns true if both of them evaluate to true.

    Compares two Boolean expressions and returns true if both of them evaluate to true.

    a & b returns true if and only if

    • a and b are true.
    Note

    This method evaluates both a and b, even if the result is already determined after evaluating a.

  3. abstract def &&(x: Boolean): Boolean

    Compares two Boolean expressions and returns true if both of them evaluate to true.

    Compares two Boolean expressions and returns true if both of them evaluate to true.

    a && b returns true if and only if

    • a and b are true.
    Note

    This method uses 'short-circuit' evaluation and behaves as if it was declared as def &&(x: => Boolean): Boolean. If a evaluates to false, false is returned without evaluating b.

  4. abstract def ==(x: Boolean): Boolean

    Compares two Boolean expressions and returns true if they evaluate to the same value.

    Compares two Boolean expressions and returns true if they evaluate to the same value.

    a == b returns true if and only if

    • a and b are true or
    • a and b are false.
  5. abstract def ^(x: Boolean): Boolean

    Compares two Boolean expressions and returns true if they evaluate to a different value.

    Compares two Boolean expressions and returns true if they evaluate to a different value.

    a ^ b returns true if and only if

    • a is true and b is false or
    • a is false and b is true.
  6. abstract def unary_!: Boolean

    Negates a Boolean expression.

    Negates a Boolean expression.

    - !a results in false if and only if a evaluates to true and - !a results in true if and only if a evaluates to false.

    returns

    the negated expression

  7. abstract def |(x: Boolean): Boolean

    Compares two Boolean expressions and returns true if one or both of them evaluate to true.

    Compares two Boolean expressions and returns true if one or both of them evaluate to true.

    a | b returns true if and only if

    • a is true or
    • b is true or
    • a and b are true.
    Note

    This method evaluates both a and b, even if the result is already determined after evaluating a.

  8. abstract def ||(x: Boolean): Boolean

    Compares two Boolean expressions and returns true if one or both of them evaluate to true.

    Compares two Boolean expressions and returns true if one or both of them evaluate to true.

    a || b returns true if and only if

    • a is true or
    • b is true or
    • a and b are true.
    Note

    This method uses 'short-circuit' evaluation and behaves as if it was declared as def ||(x: => Boolean): Boolean. If a evaluates to true, true is returned without evaluating b.

Concrete Value Members

  1. def <(that: Boolean): Boolean

    Returns true if this is less than that

    Returns true if this is less than that

    Implicit
    This member is added by an implicit conversion from Boolean to RichBoolean performed by method booleanWrapper in scala.LowPriorityImplicits.
    Definition Classes
    Ordered
  2. def <=(that: Boolean): Boolean

    Returns true if this is less than or equal to that.

    Returns true if this is less than or equal to that.

    Implicit
    This member is added by an implicit conversion from Boolean to RichBoolean performed by method booleanWrapper in scala.LowPriorityImplicits.
    Definition Classes
    Ordered
  3. def >(that: Boolean): Boolean

    Returns true if this is greater than that.

    Returns true if this is greater than that.

    Implicit
    This member is added by an implicit conversion from Boolean to RichBoolean performed by method booleanWrapper in scala.LowPriorityImplicits.
    Definition Classes
    Ordered
  4. def >=(that: Boolean): Boolean

    Returns true if this is greater than or equal to that.

    Returns true if this is greater than or equal to that.

    Implicit
    This member is added by an implicit conversion from Boolean to RichBoolean performed by method booleanWrapper in scala.LowPriorityImplicits.
    Definition Classes
    Ordered
  5. def booleanValue(): Boolean
    Implicit
    This member is added by an implicit conversion from Boolean to java.lang.Boolean performed by method boolean2Boolean in scala.Predef.
    Definition Classes
    Boolean
  6. def compare(y: Boolean): Int

    Result of comparing this with operand that.

    Result of comparing this with operand that.

    Implement this method to determine how instances of A will be sorted.

    Returns x where:

    • x < 0 when this < that
    • x == 0 when this == that
    • x > 0 when this > that
    Implicit
    This member is added by an implicit conversion from Boolean to RichBoolean performed by method booleanWrapper in scala.LowPriorityImplicits.
    Definition Classes
    OrderedProxyOrdered
  7. def compareTo(arg0: java.lang.Boolean): Int
    Implicit
    This member is added by an implicit conversion from Boolean to java.lang.Boolean performed by method boolean2Boolean in scala.Predef.
    Definition Classes
    Boolean → Comparable
  8. def compareTo(that: Boolean): Int

    Result of comparing this with operand that.

    Result of comparing this with operand that.

    Implicit
    This member is added by an implicit conversion from Boolean to RichBoolean performed by method booleanWrapper in scala.LowPriorityImplicits.
    Definition Classes
    Ordered → Comparable
  9. def getClass(): Class[Boolean]

    Returns the runtime class representation of the object.

    Returns the runtime class representation of the object.

    returns

    a class object corresponding to the runtime type of the receiver.

    Definition Classes
    BooleanAnyValAny
  10. val self: Boolean
    Implicit
    This member is added by an implicit conversion from Boolean to RichBoolean performed by method booleanWrapper in scala.LowPriorityImplicits.
    Definition Classes
    RichBooleanTypedProxy

Shadowed Implicit Value Members

  1. def equals(arg0: Any): Boolean

    The equality method for reference types.

    The equality method for reference types. Default implementation delegates to eq.

    See also equals in scala.Any.

    returns

    true if the receiver object is equivalent to the argument; false otherwise.

    Implicit
    This member is added by an implicit conversion from Boolean to java.lang.Boolean performed by method boolean2Boolean 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:
    (boolean: java.lang.Boolean).equals(arg0)
    Definition Classes
    Boolean → AnyRef → Any
  2. def hashCode(): Int

    The hashCode method for reference types.

    The hashCode method for reference types. See hashCode in scala.Any.

    returns

    the hash code value for this object.

    Implicit
    This member is added by an implicit conversion from Boolean to java.lang.Boolean performed by method boolean2Boolean 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:
    (boolean: java.lang.Boolean).hashCode()
    Definition Classes
    Boolean → AnyRef → Any
  3. def toString(): String

    Creates a String representation of this object.

    Creates a String representation of this object. The default representation is platform dependent. On the java platform it is the concatenation of the class name, "@", and the object's hashcode in hexadecimal.

    returns

    a String representation of the object.

    Implicit
    This member is added by an implicit conversion from Boolean to java.lang.Boolean performed by method boolean2Boolean 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:
    (boolean: java.lang.Boolean).toString()
    Definition Classes
    Boolean → AnyRef → Any
  4. def toString(): String

    Returns a string representation of the object.

    Returns a string representation of the object.

    The default representation is platform dependent.

    returns

    a string representation of the object.

    Implicit
    This member is added by an implicit conversion from Boolean to RichBoolean performed by method booleanWrapper in scala.LowPriorityImplicits.
    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:
    (boolean: RichBoolean).toString()
    Definition Classes
    ProxyAny