src/java.base/share/classes/java/lang/Long.java

*** 377,387 ****
       */
      static String toUnsignedString0(long val, int shift) {
          // assert shift > 0 && shift <=5 : "Illegal shift value";
          int mag = Long.SIZE - Long.numberOfLeadingZeros(val);
          int chars = Math.max(((mag + (shift - 1)) / shift), 1);
- 
          if (COMPACT_STRINGS) {
              byte[] buf = new byte[chars];
              formatUnsignedLong0(val, shift, buf, 0, chars);
              return new String(buf, LATIN1);
          } else {
--- 377,386 ----
*** 488,498 ****
       * @implNote This method converts positive inputs into negative
       * values, to cover the Long.MIN_VALUE case. Converting otherwise
       * (negative to positive) will expose -Long.MIN_VALUE that overflows
       * long.
       */
!     static void getChars(long i, int index, byte[] buf) {
          long q;
          int r;
          int charPos = index;
  
          boolean negative = (i < 0);
--- 487,497 ----
       * @implNote This method converts positive inputs into negative
       * values, to cover the Long.MIN_VALUE case. Converting otherwise
       * (negative to positive) will expose -Long.MIN_VALUE that overflows
       * long.
       */
!     static int getChars(long i, int index, byte[] buf) {
          long q;
          int r;
          int charPos = index;
  
          boolean negative = (i < 0);
*** 531,543 ****
          }
  
          if (negative) {
              buf[--charPos] = (byte)'-';
          }
      }
  
!     static void getCharsUTF16(long i, int index, byte[] buf) {
          long q;
          int r;
          int charPos = index;
  
          boolean negative = (i < 0);
--- 530,543 ----
          }
  
          if (negative) {
              buf[--charPos] = (byte)'-';
          }
+         return charPos;
      }
  
!     static int getCharsUTF16(long i, int index, byte[] buf) {
          long q;
          int r;
          int charPos = index;
  
          boolean negative = (i < 0);
*** 576,585 ****
--- 576,586 ----
          }
  
          if (negative) {
              StringUTF16.putChar(buf, --charPos, '-');
          }
+         return charPos;
      }
  
      /**
       * Returns the string representation size for a given long value.
       *