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fastutil extends the Java Collections Framework by providing type-specific maps, sets, lists, and queues with a small memory footprint and fast operations; it provides also big (64-bit) arrays, sets, and lists, sorting algorithms, fast, practical I/O classes for binary and text files, and facilities for memory mapping large files. This jar (fastutil-core.jar) contains data structures based on integers, longs, doubles, and objects, only; fastutil.jar contains all classes. If you have both jars in your dependencies, this jar should be excluded.

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/*
	* Copyright (C) 2020-2022 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.objects;
/** A type-specific mutable {@link it.unimi.dsi.fastutil.Pair Pair}; provides some additional methods that use polymorphism to avoid (un)boxing. */
public class ObjectObjectMutablePair  implements it.unimi.dsi.fastutil.Pair , java.io.Serializable {
	private static final long serialVersionUID = 0L;
	protected K left;
	protected V right;
	/** Creates a new type-specific mutable {@link it.unimi.dsi.fastutil.Pair Pair} with given left and right value. 
	 * @param left the left value.
	 * @param right the right value.
	 */
	public ObjectObjectMutablePair(final K left, final V right) {
	 this.left = left;
	 this.right = right;
	}
	/** Returns a new type-specific mutable {@link it.unimi.dsi.fastutil.Pair Pair} with given left and right value. 
	 * @param left the left value.
	 * @param right the right value.
	 *
	 * @implSpec This factory method delegates to the constructor.
	 */
	public static  ObjectObjectMutablePair  of(final K left, final V right) {
	 return new ObjectObjectMutablePair (left, right);
	}
	@Override
	public K left() {
	 return left;
	}
	@Override
	public ObjectObjectMutablePair  left(final K l) {
	 left = l;
	 return this;
	}
	@Override
	public V right() {
	 return right;
	}
	@Override
	public ObjectObjectMutablePair  right(final V r) {
	 right = r;
	 return this;
	}
	@Override
	@SuppressWarnings("rawtypes")
	public boolean equals(Object other) {
	 if (other == null) return false;
	 if (other instanceof it.unimi.dsi.fastutil.Pair) {
	  return
	java.util.Objects.equals((left), ((it.unimi.dsi.fastutil.Pair)other).left())
	&& java.util.Objects.equals((right), ((it.unimi.dsi.fastutil.Pair)other).right());
	 }
	 return false;
	}
	@Override
	   public int hashCode() {
	 return ( (left) == null ? 0 : (left).hashCode() ) * 19 + ( (right) == null ? 0 : (right).hashCode() );
	}
	/** Returns a string representation of this pair in the form <l,r>.
	 *
	 * @return a string representation of this pair in the form <l,r>.
	 */
	@Override
	public String toString() {
	 return "<" + left() + "," + right() + ">";
	}
}