src/java.base/share/classes/sun/text/normalizer/Utility.java

*** 225,245 ****
          return c;
      }
  
      /**
       * Convert a integer to size width hex uppercase digits.
!      * E.g., hex('a', 4, str) => "0041".
       * Append the output to the given StringBuffer.
       * If width is too small to fit, nothing will be appended to output.
       */
      public static StringBuffer hex(int ch, int width, StringBuffer output) {
          return appendNumber(output, ch, 16, width);
      }
  
      /**
       * Convert a integer to size width (minimum) hex uppercase digits.
!      * E.g., hex('a', 4, str) => "0041".  If the integer requires more
       * than width digits, more will be used.
       */
      public static String hex(int ch, int width) {
          StringBuffer buf = new StringBuffer();
          return appendNumber(buf, ch, 16, width).toString();
--- 225,245 ----
          return c;
      }
  
      /**
       * Convert a integer to size width hex uppercase digits.
!      * E.g., {@code hex('a', 4, str) => "0041"}.
       * Append the output to the given StringBuffer.
       * If width is too small to fit, nothing will be appended to output.
       */
      public static StringBuffer hex(int ch, int width, StringBuffer output) {
          return appendNumber(output, ch, 16, width);
      }
  
      /**
       * Convert a integer to size width (minimum) hex uppercase digits.
!      * E.g., {@code hex('a', 4, str) => "0041"}.  If the integer requires more
       * than width digits, more will be used.
       */
      public static String hex(int ch, int width) {
          StringBuffer buf = new StringBuffer();
          return appendNumber(buf, ch, 16, width).toString();
*** 332,343 ****
      public static boolean isUnprintable(int c) {
          return !(c >= 0x20 && c <= 0x7E);
      }
  
      /**
!      * Escape unprintable characters using <backslash>uxxxx notation
!      * for U+0000 to U+FFFF and <backslash>Uxxxxxxxx for U+10000 and
       * above.  If the character is printable ASCII, then do nothing
       * and return FALSE.  Otherwise, append the escaped notation and
       * return TRUE.
       */
      public static boolean escapeUnprintable(StringBuffer result, int c) {
--- 332,343 ----
      public static boolean isUnprintable(int c) {
          return !(c >= 0x20 && c <= 0x7E);
      }
  
      /**
!      * Escape unprintable characters using {@code <backslash>uxxxx} notation
!      * for U+0000 to U+FFFF and {@code <backslash>Uxxxxxxxx} for U+10000 and
       * above.  If the character is printable ASCII, then do nothing
       * and return FALSE.  Otherwise, append the escaped notation and
       * return TRUE.
       */
      public static boolean escapeUnprintable(StringBuffer result, int c) {