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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) 2020-2021 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.doubles;
/**
 * A type-specific immutable {@link it.unimi.dsi.fastutil.Pair Pair}; provides
 * some additional methods that use polymorphism to avoid (un)boxing.
 */
public class DoubleObjectImmutablePair implements DoubleObjectPair, java.io.Serializable {
	private static final long serialVersionUID = 0L;
	protected final double left;
	protected final V right;
	/**
	 * Creates a new type-specific immutable {@link it.unimi.dsi.fastutil.Pair Pair}
	 * with given left and right value.
	 * 
	 * @param left
	 *            the left value.
	 * @param right
	 *            the right value.
	 */
	public DoubleObjectImmutablePair(final double left, final V right) {
		this.left = left;
		this.right = right;
	}
	/**
	 * Returns a new type-specific immutable {@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  DoubleObjectImmutablePair of(final double left, final V right) {
		return new DoubleObjectImmutablePair(left, right);
	}
	@Override
	public double leftDouble() {
		return left;
	}
	@Override
	public V right() {
		return right;
	}
	@Override
	@SuppressWarnings("rawtypes")
	public boolean equals(Object other) {
		if (other == null)
			return false;
		if (other instanceof DoubleObjectPair) {
			return left == ((DoubleObjectPair) other).leftDouble()
					&& java.util.Objects.equals(right, ((DoubleObjectPair) other).right());
		}
		if (other instanceof it.unimi.dsi.fastutil.Pair) {
			return java.util.Objects.equals(Double.valueOf(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 it.unimi.dsi.fastutil.HashCommon.double2int(left) * 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 "<" + leftDouble() + "," + right() + ">";
	}
}