检查项目是否在两个边界（包括两个边界）之间。

//package com.nowjava;

/*
来 自*
 N  o w  J a v a . c o m
*/

import java.util.*;


public class Main {

    /**

     * Checks that the item is between the two bounds, inclusive.

     *

     * @param bound1 The first bound, could be the high or low bound.

     * @param bound2 The second bound, could be the high or low bound.

     * @param item The item to check is between the bounds.

     * @param <T> The type of objects being compared, must implement Comparable.

     * @return True if item is between the bounds, false otherwise.

     */

    public static <T extends Comparable> boolean between(final T bound1,

            final T bound2, final T item) {

        return between(bound1, bound2, item, false);

    }


    /**

     * Checks that the item is between the two bounds, inclusive.  Uses a custom comparator.

     *

     * @param bound1 The first bound, could be the high or low bound.

     * @param bound2 The second bound, could be the high or low bound.

     * @param item The item to check is between the bounds.

     * @param comparator The comparator used to compare the objects in the test.

     * @param <T> The type of objects being compared.

     * @return True if item is between the bounds, false otherwise.

     * @throws NullPointerException If the comparator is null.

     */

    public static <T> boolean between(final T bound1, final T bound2,// 来自 n o w j a   v  a . c o m - 时  代  Java

            final T item, final Comparator<T> comparator) {

        return between(bound1, bound2, item, false, comparator);

    }


    /**

     * Checks that the item is between the two bounds.  If marked as strict it

     * is not an inclusive test, bound1 and bound2 will not return true if passed in as the item.

     *

     * @param bound1 The first bound, could be the high or low bound.

     * @param bound2 The second bound, could be the high or low bound.

     * @param item The item to check is between the bounds.

     * @param strict If true, the check will not be inclusive of the bounds.

     * @param <T> The type of objects being compared, must implement Comparable.

     * @return True if item is between the bounds, false otherwise.

     */

    public static <T extends Comparable> boolean between(final T bound1,

            final T bound2, final T item, final boolean strict) {

        Comparator<Comparable> order = Comparator.naturalOrder();

        return between(bound1, bound2, item, strict, order);

    }


    /**

     * Checks that the item is between the two bounds.  Uses a custom comparator.

     * If marked as strict it is not an inclusive test,

     * bound1 and bound2 will not return true if passed in as the item.

     *

     * @param bound1 The first bound, could be the high or low bound.

     * @param bound2 The second bound, could be the high or low bound.

     * @param item The item to check is between the bounds.

     * @param strict If true, the check will not be inclusive of the bounds.

     * @param comparator The comparator used to compare the objects in the test.

     * @param <T> The type of objects being compared.

     * @return True if item is between the bounds, false otherwise.

     * @throws NullPointerException If the comparator is null.

     */

    public static <