read line using java & maped filterd data [closed]

Answer 1

Here is the dirty solution. The assumption is that the "result" map contains only 1 month.

public class Reader
{
    public static void main(final String[] args) throws ParseException
    {
        BufferedReader reader = null;
        String animalName = "cat";
        // String animal = null;
        try
        {
            reader = new BufferedReader(new InputStreamReader(new FileInputStream("C:/1.txt")));
            Map result = new LinkedHashMap();
            Map result2 = new LinkedHashMap();

            while (reader.ready())
            {
                String line = reader.readLine();
                // split a line with spaces
                String[] values = line.split(",");
                String key = null;
                if (values[1].compareTo(animalName) == 0)
                {
                    key = values[0];
                    // animal=""+ ""+values[1].compareTo(animalName);
                    int sum = 0;
                    int count = 0;
                    // get a last counter and sum
                    if (result.containsKey(key))
                    {
                        sum = result.get(key);
                        count = result2.get(key);
                    }
                    else
                    {
                    }
                    // increment sum a count and save in the map with key
                    result.put(key, sum + Integer.parseInt(values[2]));
                    result2.put(key, count + 1);
                }
            }

            String date = result.keySet().iterator().next();
            DateFormat df = new SimpleDateFormat("mm/dd/yyyy");
            Calendar calendar = Calendar.getInstance();
            calendar.setTime(df.parse(date));
            int monthStart = calendar.getActualMinimum(Calendar.DAY_OF_MONTH);
            int monthEnd = calendar.getActualMaximum(Calendar.DAY_OF_MONTH);
            calendar.set(Calendar.DAY_OF_MONTH, 0);

            // interate and print new output
            for (int i = monthStart; i < monthEnd; i++)
            {
                calendar.add(Calendar.DAY_OF_MONTH, 1);
                String key = df.format(calendar.getTime());
                if (result.containsKey(key))
                {
                    Integer sum = result.get(key);
                    Integer count = result2.get(key);
                    System.out.println(key + "   " + animalName + " " + sum + "\t" + count);
                }
                System.out.println(key);
            }
        }
        catch (FileNotFoundException e)
        {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        catch (IOException e)
        {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        finally
        {
            try
            {
                reader.close();
            }
            catch (IOException e)
            {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }

    }
}