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fastutil extends the Java Collections Framework by providing type-specific maps, sets, lists and priority queues with a small memory footprint and fast access and insertion; provides also big (64-bit) arrays, sets and lists, and fast, practical I/O classes for binary and text files.

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/*
	* Copyright (C) 2002-2017 Sebastiano Vigna
	*
	* Licensed under the Apache License, Version 2.0 (the "License");
	* you may not use this file except in compliance with the License.
	* You may obtain a copy of the License at
	*
	*     http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing, software
	* distributed under the License is distributed on an "AS IS" BASIS,
	* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	* See the License for the specific language governing permissions and
	* limitations under the License.
	*/
package it.unimi.dsi.fastutil.ints;
import java.util.Comparator;
/**
 * A type-specific {@link Comparator}; provides methods to compare two primitive
 * types both as objects and as primitive types.
 *
 * 
 * Note that {@code fastutil} provides a corresponding abstract class that can
 * be used to implement this interface just by specifying the type-specific
 * comparator.
 *
 * @see Comparator
 */
@FunctionalInterface
public interface IntComparator extends Comparator {
	/**
	 * Compares its two primitive-type arguments for order. Returns a negative
	 * integer, zero, or a positive integer as the first argument is less than,
	 * equal to, or greater than the second.
	 *
	 * @see java.util.Comparator
	 * @return a negative integer, zero, or a positive integer as the first argument
	 *         is less than, equal to, or greater than the second.
	 */
	int compare(int k1, int k2);
	/**
	 * {@inheritDoc}
	 * 
	 * This implementation delegates to the corresponding type-specific method.
	 * 
	 * @deprecated Please use the corresponding type-specific method instead.
	 */
	@Deprecated
	@Override
	default int compare(Integer ok1, Integer ok2) {
		return compare(ok1.intValue(), ok2.intValue());
	}
}