private static String toUnsignedString ( int i , int shift ) { char [ ] buf = new char [ 32 ] ; int charPos = 32 ; int radix = 1 << shift ; int mask = radix - 1 ; do { buf [ -- charPos ] = digits [ i & mask ] ; i >>>= shift ; } while ( i != 0 ) ; return new String ( buf , charPos , ( 32 - charPos ) ) ; }
Convert the integer to an unsigned number .