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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) 2002-2020 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.Iterator;
import java.util.PrimitiveIterator;
import java.util.function.Consumer;
/**
 * A type-specific {@link Iterator}; provides an additional method to avoid
 * (un)boxing, and the possibility to skip elements.
 *
 * @see Iterator
 */
public interface IntIterator extends PrimitiveIterator.OfInt {
	/**
	 * Returns the next element as a primitive type.
	 *
	 * @return the next element in the iteration.
	 * @see Iterator#next()
	 */
	@Override
	int nextInt();
	/**
	 * {@inheritDoc}
	 * 
	 * @deprecated Please use the corresponding type-specific method instead.
	 */
	@Deprecated
	@Override
	default Integer next() {
		return Integer.valueOf(nextInt());
	}
	/**
	 * {@inheritDoc}
	 * 
	 * @deprecated Please use the corresponding type-specific method instead.
	 */
	@Deprecated
	@Override
	default void forEachRemaining(final Consumer action) {
		forEachRemaining((java.util.function.IntConsumer) action::accept);
	}
	/**
	 * Skips the given number of elements.
	 *
	 * 
	 * The effect of this call is exactly the same as that of calling
	 * {@link #next()} for {@code n} times (possibly stopping if {@link #hasNext()}
	 * becomes false).
	 *
	 * @param n
	 *            the number of elements to skip.
	 * @return the number of elements actually skipped.
	 * @see Iterator#next()
	 */
	default int skip(final int n) {
		if (n < 0)
			throw new IllegalArgumentException("Argument must be nonnegative: " + n);
		int i = n;
		while (i-- != 0 && hasNext())
			nextInt();
		return n - i - 1;
	}
}