question: public void loadTraces ( Reader r ) throws TraceException , java . io . IOException { TrimLineReader reader = new LogFileTraces . TrimLineReader ( r ) ; StringTokenizer tokens = reader . tokenizeLine ( ) ; if ( tokens == null ) { throw new TraceException ( "Trace file is empty." ) ; } while ( ! tokens . hasMoreTokens ( ) ) { tokens = reader . tokenizeLine ( ) ; } String token = tokens . nextToken ( ) ; while ( token . startsWith ( "[" ) || token . startsWith ( "#" ) ) { readTraceType ( token , tokens ) ; tokens = reader . tokenizeLine ( ) ; while ( ! tokens . hasMoreTokens ( ) ) { tokens = reader . tokenizeLine ( ) ; } token = tokens . nextToken ( ) ; } String [ ] labels = new String [ tokens . countTokens ( ) ] ; for ( int i = 0 ; i < labels . length ; i ++ ) { labels [ i ] = tokens . nextToken ( ) ; addTraceAndType ( labels [ i ] ) ; } int traceCount = getTraceCount ( ) ; boolean firstState = true ; tokens = reader . tokenizeLine ( ) ; while ( tokens != null && tokens . hasMoreTokens ( ) ) { String stateString = tokens . nextToken ( ) ; long state = 0 ; try { try { state = ( long ) Double . parseDouble ( stateString ) ; } catch ( NumberFormatException nfe ) { throw new TraceException ( "Unable to parse state number in column 1 (Line " + reader . getLineNumber ( ) + ")" ) ; } if ( firstState ) { if ( state == 1 ) state = 0 ; firstState = false ; } if ( ! addState ( state ) ) { throw new TraceException ( "State " + state + " is not consistent with previous spacing (Line " + reader . getLineNumber ( ) + ")" ) ; } } catch ( NumberFormatException nfe ) { throw new TraceException ( "State " + state + ":Expected real value in column " + reader . getLineNumber ( ) ) ; } for ( int i = 0 ; i < traceCount ; i ++ ) { if ( tokens . hasMoreTokens ( ) ) { String value = tokens . nextToken ( ) ; if ( state == 0 ) assignTraceTypeAccordingValue ( value ) ; try { addParsedValue ( i , value ) ; } catch ( NumberFormatException nfe ) { throw new TraceException ( "State " + state + ": Expected correct number type (Double, Integer or String) in column " + ( i + 1 ) + " (Line " + reader . getLineNumber ( ) + ")" ) ; } } else { throw new TraceException ( "State " + state + ": missing values at line " + reader . getLineNumber ( ) ) ; } } tokens = reader . tokenizeLine ( ) ; } burnIn = ( int ) ( 0.1 * lastState ) ; }
target:  Walter: Please comment what the extra arguments mean