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- Functional Interface:
- This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.
@FunctionalInterface public interface LongUnaryOperator
Represents an operation on a singlelong-valued operand that produces along-valued result. This is the primitive type specialization ofUnaryOperatorforlong.This is a functional interface whose functional method is
applyAsLong(long).- Since:
- 1.8
- See Also:
UnaryOperator
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Method Summary
All Methods Static Methods Instance Methods Abstract Methods Default Methods Modifier and Type Method Description default LongUnaryOperatorandThen(LongUnaryOperator after)Returns a composed operator that first applies this operator to its input, and then applies theafteroperator to the result.longapplyAsLong(long operand)Applies this operator to the given operand.default LongUnaryOperatorcompose(LongUnaryOperator before)Returns a composed operator that first applies thebeforeoperator to its input, and then applies this operator to the result.static LongUnaryOperatoridentity()Returns a unary operator that always returns its input argument.
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Method Detail
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applyAsLong
long applyAsLong(long operand)
Applies this operator to the given operand.- Parameters:
operand- the operand- Returns:
- the operator result
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compose
default LongUnaryOperator compose(LongUnaryOperator before)
Returns a composed operator that first applies thebeforeoperator to its input, and then applies this operator to the result. If evaluation of either operator throws an exception, it is relayed to the caller of the composed operator.- Parameters:
before- the operator to apply before this operator is applied- Returns:
- a composed operator that first applies the
beforeoperator and then applies this operator - Throws:
NullPointerException- if before is null- See Also:
andThen(LongUnaryOperator)
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andThen
default LongUnaryOperator andThen(LongUnaryOperator after)
Returns a composed operator that first applies this operator to its input, and then applies theafteroperator to the result. If evaluation of either operator throws an exception, it is relayed to the caller of the composed operator.- Parameters:
after- the operator to apply after this operator is applied- Returns:
- a composed operator that first applies this operator and then
applies the
afteroperator - Throws:
NullPointerException- if after is null- See Also:
compose(LongUnaryOperator)
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identity
static LongUnaryOperator identity()
Returns a unary operator that always returns its input argument.- Returns:
- a unary operator that always returns its input argument
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