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

@@ -377,11 +377,10 @@
      */
     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 {

@@ -488,11 +487,11 @@
      * @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) {
+    static int getChars(long i, int index, byte[] buf) {
         long q;
         int r;
         int charPos = index;
 
         boolean negative = (i < 0);

@@ -531,13 +530,14 @@
         }
 
         if (negative) {
             buf[--charPos] = (byte)'-';
         }
+        return charPos;
     }
 
-    static void getCharsUTF16(long i, int index, byte[] buf) {
+    static int getCharsUTF16(long i, int index, byte[] buf) {
         long q;
         int r;
         int charPos = index;
 
         boolean negative = (i < 0);

@@ -576,10 +576,11 @@
         }
 
         if (negative) {
             StringUTF16.putChar(buf, --charPos, '-');
         }
+        return charPos;
     }
 
     /**
      * Returns the string representation size for a given long value.
      *