1. java.util.Arrays
    2. java.util.Comparator
    4. static  List    asList(T... a)
    6. static int    binarySearch(char[] a, char key)
    7. static int    binarySearch(char[] a, int fromIndex, int toIndex, char key)
    8. static int    binarySearch(Object[] a, int fromIndex, int toIndex, Object key)
    9. static int    binarySearch(Object[] a, Object key)
    10. static int    binarySearch(T[] a, int fromIndex, int toIndex, T key, Comparator<? super T> c)
    11. static int    binarySearch(T[] a, T key, Comparator<? super T> c)
    13. static char[]    copyOf(char[] original, int newLength)
    14. static  T[]    copyOf(T[] original, int newLength)
    15. static char[]    copyOfRange(char[] original, int from, int to)
    16. static  T[]    copyOfRange(T[] original, int from, int to)
    18. static boolean    equals(char[] a, char[] a2)
    19. static boolean    equals(Object[] a, Object[] a2)
    21. static void    fill(char[] a, char val)
    22. static void    fill(char[] a, int fromIndex, int toIndex, char val)
    23. static void    fill(Object[] a, int fromIndex, int toIndex, Object val)
    24. static void    fill(Object[] a, Object val)
    26. static int    hashCode(char[] a)
    27. static int    hashCode(Object[] a)
    29. static void    sort(char[] a)
    30. static void    sort(char[] a, int fromIndex, int toIndex)
    31. static void    sort(T[] a, Comparator<? super T> c)
    32. static void    sort(T[] a, int fromIndex, int toIndex, Comparator<? super T> c)
    34. static String    toString(char[] a)
    35. static String    toString(Object[] a)