Question

I have a weird problem that I don’t fully understand how to solve. Could someone please give me some pointers on hashmaps?

I have a variable:

/servlet/charting?base_color=grey&chart_width=288&chart_height=160&chart_type=png&chart_style=manufund_pie&3DSet=true&chart_size=small&leg_on=left&static_xvalues=10.21,12.12,43.12,12.10,&static_labels=blue,red,green,purple"

I basically want 10.21,12.12,43.12,12.10 to be associated with blue,red,green,purple (in the order displayed)

In python I created a method that does this with:

def stripChart(name):
    name = str(name)
    name = urlparse.urlparse(name)
    name = cgi.parse_qs(name.query)
    name = dict(zip( name['static_labels'][0].split(','), name['static_xvalues'][0].split(',')))

Not sure how to do this in java. So far I have:

URL imgURL = new URL (imgTag);
String[] result = imgURL.getFile().split("&");
 for (int x=0; x<result.length; x++)
     System.out.println(result[x]);

This gives me:

chart_width=288
chart_height=160
chart_type=png
chart_style=manufund_pie
3DSet=true
chart_size=small
leg_on=left
static_xvalues=10.21,12.12,43.12,12.10,
static_labels=blue,red,green,purple,

At this point I’m confused how to link static_labels and static_xvalues values.

Thanks so much. Any pointers would be awesome.

Answer 1

You want to look at StringTokenizer

Something like this (assuming you stored the labels into the String ‘static_labels’ and the values in the String ‘static_xvalues’):

HashMap<String, Double> colorMap = new HashMap<String, Double>();
StringTokenizer labelTok = new StringTokenizer(static_labels, ",");
StringTokenizer valuesTok = new StringTokenizer(static_xvalues, ",");
while(labelTok.hasMoreElements()){
  assert(valuesTok.hasMoreElements());
  colorMap.put(labelTok.nextElement(), Double.parseDouble(valuesTok.nextElement()));
}