Module java.base
Package java.util.function

Interface IntUnaryOperator

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 IntUnaryOperator
Represents an operation on a single int-valued operand that produces an int-valued result. This is the primitive type specialization of UnaryOperator for int.

This is a functional interface whose functional method is applyAsInt(int).

Since:
1.8
See Also:
UnaryOperator

  • Method Summary

    Modifier and Type Method Description
    default IntUnaryOperator andThen​(IntUnaryOperator after)
    Returns a composed operator that first applies this operator to its input, and then applies the after operator to the result.
    int applyAsInt​(int operand)
    Applies this operator to the given operand.
    default IntUnaryOperator compose​(IntUnaryOperator before)
    Returns a composed operator that first applies the before operator to its input, and then applies this operator to the result.
    static IntUnaryOperator identity()
    Returns a unary operator that always returns its input argument.

  • Method Details

    • applyAsInt

      int applyAsInt​(int operand)
      Applies this operator to the given operand.
      Parameters:
      operand - the operand
      Returns:
      the operator result

    • compose

      default IntUnaryOperator compose​(IntUnaryOperator 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(IntUnaryOperator)

    • andThen

      default IntUnaryOperator andThen​(IntUnaryOperator 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(IntUnaryOperator)

    • identity

      static IntUnaryOperator identity()
      Returns a unary operator that always returns its input argument.
      Returns:
      a unary operator that always returns its input argument