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added in API level 24

LongUnaryOperator

public interface LongUnaryOperator

java.util.function.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).

See also:

Summary

Public methods

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.

abstract long applyAsLong(long operand)

Applies this operator to the given operand.

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.

static LongUnaryOperator identity()

Returns a unary operator that always returns its input argument.

Public methods

andThen

added in API level 24
public 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 LongUnaryOperator: the operator to apply after this operator is applied

Returns
LongUnaryOperator a composed operator that first applies this operator and then applies the after operator

Throws
NullPointerException if after is null

applyAsLong

added in API level 24
public abstract long applyAsLong (long operand)

Applies this operator to the given operand.

Parameters
operand long: the operand

Returns
long the operator result

compose

added in API level 24
public 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 LongUnaryOperator: the operator to apply before this operator is applied

Returns
LongUnaryOperator a composed operator that first applies the before operator and then applies this operator

Throws
NullPointerException if before is null

identity

added in API level 24
public static LongUnaryOperator identity ()

Returns a unary operator that always returns its input argument.

Returns
LongUnaryOperator a unary operator that always returns its input argument