排序

java.util.Arrays

• static void sort(T[] a)
• static void sort(T[] a, int fromIndex, int toIndex)
• static void sort(T[] a, Comparator<? super T> c)
• static void sort(T[] a, int fromIndex, int toIndex, Comparator<? super T> c)

java.util.Collections

• static void sort(List<T> list)
• static void sort(List<T> list, Comparator<? super T> c)