maybethis.java

void printMaxValue( int start, int end ){
  int maxValue = 0;

  println( "Considering " + lines.length + " lines: (chars " + start + " to " + end + ")" ); 
  for( int i = 0; i < lines.length; i++ ){

    if( lines[i].length() >= end ){
      println( i + ": extracted " + lines[i].substring( start, end ) + ", which parses as " + int( lines[i].substring( start, end ) ) ); 
      maxValue = max( maxValue, int( lines[i].substring( start, end ) ) );
    }
    else{
      println( i + ": too short!" ); 
    }
  }
  println( "--- that would be all!" ); 
  println( maxValue );
}