/*
* Copyright (c) 2012, 2013, Oracle and/or its affiliates. All rights reserved.
* ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
*
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package java.util.function;
/**
* Represents an operation on a single operand that produces a result of the
* same type as its operand. This is a specialization of {@code Function} for
* the case where the operand and result are of the same type.
*
* <p>This is a <a href="package-summary.html">functional interface</a>
* whose functional method is {@link #apply(Object)}.
*
* @param <T> the type of the operand and result of the operator
*
* @see Function
* @since 1.8
*/
@
FunctionalInterface
public interface
UnaryOperator<T> extends
Function<T, T> {
/**
* Returns a unary operator that always returns its input argument.
*
* @param <T> the type of the input and output of the operator
* @return a unary operator that always returns its input argument
*/
static <T>
UnaryOperator<T>
identity() {
return
t ->
t;
}
}