Interface LongUnaryOperator
- 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 single long
-valued operand that produces a long
-valued result. This is the primitive type specialization of UnaryOperator
for long
.
This is a functional interface whose functional method is applyAsLong(long)
.
- Since:
- 1.8
- See Also:
UnaryOperator
Methods
Modifier and Type | Method | Description |
---|---|---|
default LongUnaryOperator | andThen(LongUnaryOperator after) | Returns a composed operator that first applies this operator to its input, and then applies the |
long | applyAsLong(long operand) | Applies this operator to the given operand. |
default LongUnaryOperator | compose(LongUnaryOperator before) | Returns a composed operator that first applies the |
static LongUnaryOperator | identity() | Returns a unary operator that always returns its input argument. |
Methods
applyAsLong
long applyAsLong(long operand)
Applies this operator to the given operand.
- Parameters:
-
operand
- the operand - Returns:
- the operator result
compose
default LongUnaryOperator compose(LongUnaryOperator before)
Returns a composed operator that first applies the before
operator 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
before
operator and then applies this operator - Throws:
-
NullPointerException
- if before is null - See Also:
andThen(LongUnaryOperator)
andThen
default LongUnaryOperator andThen(LongUnaryOperator after)
Returns a composed operator that first applies this operator to its input, and then applies the after
operator 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
after
operator - Throws:
-
NullPointerException
- if after is null - See Also:
compose(LongUnaryOperator)
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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https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/util/function/LongUnaryOperator.html