Arrays 源码解读

/**
* This class contains various methods for manipulating arrays (such as
* sorting and searching). This class also contains a static factory
* that allows arrays to be viewed as lists.
*
* <p>The methods in this class all throw a {@code NullPointerException},
* if the specified array reference is null, except where noted.
*
* <p>The documentation for the methods contained in this class includes
* briefs description of the <i>implementations</i>. Such descriptions should
* be regarded as <i>implementation notes</i>, rather than parts of the
* <i>specification</i>. Implementors should feel free to substitute other
* algorithms, so long as the specification itself is adhered to. (For
* example, the algorithm used by {@code sort(Object[])} does not have to be
* a MergeSort, but it does have to be <i>stable</i>.)
*
* <p>This class is a member of the
* <a href="{@docRoot}/../technotes/guides/collections/index.html">
* Java Collections Framework</a>.
*
* @author Josh Bloch
* @author Neal Gafter
* @author John Rose
* @since
1.2
*/
public class Arrays {
/**
* The minimum array length below which a parallel sorting
* algorithm will not further partition the sorting task. Using
* smaller sizes typically results in memory contention across
* tasks that makes parallel speedups unlikely.
*/
private static final int MIN_ARRAY_SORT_GRAN = 1 << 13;
// Suppresses default constructor, ensuring non-instantiability.
**解释**
/**
*此类包含用于操作数组的各种方法（例如
*排序和搜索）。此类还包含静态工厂
*这样就可以将数组视为列表。
*
*<p>此类中的方法都会引发@code nullpointerException，
*如果指定的数组引用为空，除非另有说明。
*
*<p>此类中包含的方法的文档包括
*简要介绍<i>实现的说明。这种描述应该
*被视为实施说明，而不是
*<i>规格。实施者应该可以自由地替换其他的
*算法，只要遵守规范本身。（用于
*例如，@code sort（object[]）使用的算法不必是
*合并排序，但它必须是稳定的。
*
*<p>这个班是
*<a href=“@docroot/…/technotes/guides/collections/index.html”>
* Java集合框架</a>。
*
*@作者乔什·布洛赫
*@作者Neal Gafter
*@作家约翰·罗斯
*@自1.2起
*/
公共类数组{
/**
*并行排序的最小数组长度
*算法不会进一步划分排序任务。使用
*较小的大小通常会导致内存争用
*使并行加速不太可能的任务。
*/
private static final int min_array_sort_gran=1<<13；
//取消默认构造函数，确保不可实例化。

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