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pw . println ( date + " " + rank );
pw . close ();
String gnuplot_cmd =
"set term png\n" +
"set output \"" + GRAPH_FILE + "\"\n" +
"set xdata time\n" +
"set ylabel \"Book sales rank\"\n" +
"set bmargin 3\n" +
"set logscale y\n" +
"set yrange [1:60000] reverse\n" +
"set timefmt \"%m %d %H %M %S %Y\"\n" +
"plot \"" + DATA_FILE +
"\" using 1:7 title \"" + title + "\" with lines\n"
;
iif (! new
new File ( PLOTTER_PROG ). exists ()) {
System . out . println ( "Plotting software not installed" );
return
return ;
}
Process proc = Runtime . getRuntime (). exec ( PLOTTER_PROG );
PrintWriter gp = new
new PrintWriter ( proc . getOutputStream ());
gp . print ( gnuplot_cmd );
gp . close ();
}
/**
* Look for something like this in the HTML input:
* <b>Sales Rank:</b>
* #26,252
* </font><br>
* @throws IOException
* @throws IOException
*/
public
public static
static int
int getBookRank ( String isbn ) throws
throws IOException {
// The RE pattern - digits and commas allowed
final
final String pattern = "Rank:</b> #([\\d,]+)" ;
final
final Pattern r = Pattern . compile ( pattern );
// The url -- must have the "isbn=" at the very end, or otherwise
// be amenable to being appended to.
final
final String url = "http://www.amazon.com/exec/obidos/ASIN/" + isbn ;
// Open the URL and get a Reader from it.
final
final BufferedReader is = new
new BufferedReader ( new
new InputStreamReader (
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