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Apache Commons Lang, a package of Java utility classes for the classes that are in java.lang's hierarchy, or are considered to be so standard as to justify existence in java.lang.

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/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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 org.apache.commons.lang3;

/**
 * Specializes {@link NumberRange} for {@link Integer}s.
 *
 * 
 * This class is not designed to interoperate with other NumberRanges
 * 
 *
 * @since 3.13.0
 */
public final class IntegerRange extends NumberRange {

    private static final long serialVersionUID = 1L;

    /**
     * Creates a range with the specified minimum and maximum values (both inclusive).
     *
     * 
     * The range uses the natural ordering of the elements to determine where values lie in the range.
     * 
     *
     * 
     * The arguments may be passed in the order (min,max) or (max,min). The getMinimum and getMaximum methods will return the correct values.
     * 
     *
     * @param fromInclusive the first value that defines the edge of the range, inclusive.
     * @param toInclusive the second value that defines the edge of the range, inclusive.
     * @return the range object, not null.
     */
    public static IntegerRange of(final int fromInclusive, final int toInclusive) {
        return of(Integer.valueOf(fromInclusive), Integer.valueOf(toInclusive));
    }

    /**
     * Creates a range with the specified minimum and maximum values (both inclusive).
     *
     * 
     * The range uses the natural ordering of the elements to determine where values lie in the range.
     * 
     *
     * 
     * The arguments may be passed in the order (min,max) or (max,min). The getMinimum and getMaximum methods will return the correct values.
     * 
     *
     * @param fromInclusive the first value that defines the edge of the range, inclusive.
     * @param toInclusive the second value that defines the edge of the range, inclusive.
     * @return the range object, not null.
     * @throws IllegalArgumentException if either element is null.
     */
    public static IntegerRange of(final Integer fromInclusive, final Integer toInclusive) {
        return new IntegerRange(fromInclusive, toInclusive);
    }

    /**
     * Creates an instance.
     *
     * @param number1 the first element, not null
     * @param number2 the second element, not null
     * @throws NullPointerException when element1 is null.
     * @throws NullPointerException when element2 is null.
     */
    private IntegerRange(final Integer number1, final Integer number2) {
        super(number1, number2, null);
    }

}