question: private int scanToken ( int startPos ) { int position = startPos ; while ( position < maxPosition ) { if ( ! hasSurrogates ) { char c = str . charAt ( position ) ; if ( ( c <= maxDelimCodePoint ) && ( delimiters . indexOf ( c ) >= 0 ) ) break ; position ++ ; } else { int c = str . codePointAt ( position ) ; if ( ( c <= maxDelimCodePoint ) && isDelimiter ( c ) ) break ; position += Character . charCount ( c ) ; } } if ( retDelims && ( startPos == position ) ) { if ( ! hasSurrogates ) { char c = str . charAt ( position ) ; if ( ( c <= maxDelimCodePoint ) && ( delimiters . indexOf ( c ) >= 0 ) ) position ++ ; } else { int c = str . codePointAt ( position ) ; if ( ( c <= maxDelimCodePoint ) && isDelimiter ( c ) ) position += Character . charCount ( c ) ; } } return position ; }
target:  Skips ahead from startPos and returns the index of the next delimiter character encountered, or maxPosition if no such delimiter is found.