code: public static int compare(char[] s1, char[] s2, int options) {
          return internalCompare(CharBuffer.wrap(s1), CharBuffer.wrap(s2), options);
      }
docs: Compare two strings for canonical equivalence.
  Further options include case-insensitive comparison and
  code point order (as opposed to code unit order).
  Convenience method.
  
  @param s1 First source string.
  @param s2 Second source string.
  
  @param options A bit set of options:
  - FOLD_CASE_DEFAULT or 0 is used for default options:
  Case-sensitive comparison in code unit order, and the input strings
  are quick-checked for FCD.
  
  - INPUT_IS_FCD
  Set if the caller knows that both s1 and s2 fulfill the FCD
  conditions. If not set, the function will quickCheck for FCD
  and normalize if necessary.
  
  - COMPARE_CODE_POINT_ORDER
  Set to choose code point order instead of code unit order
  
  - COMPARE_IGNORE_CASE
  Set to compare strings case-insensitively using case folding,
  instead of case-sensitively.
  If set, then the following case folding options are used.
  
  @return &lt;0 or 0 or &gt;0 as usual for string comparisons
  
  @see #normalize
  @see #FCD