Question

When I create a Date from parsing a String and access the day of the month, I get the wrong value.

Date datearr = null;
DateFormat df1 = new SimpleDateFormat("dd-MM-yyyy");
String dataa = "17-03-2012";
try {
    datearr = df1.parse(dataa);
} catch (ParseException e) {
    Toast.makeText(this, "err", 1000).show();
}

int DPDMonth = datearr.getMonth() + 1;
int DPDDay = datearr.getDay();
int DPDYear = datearr.getYear() + 1900;

System.out.println(Integer.toString(DPDDay)+"-"+Integer.toString(DPDMonth)+"-"+Integer.toString(DPDYear));

Why do I get 0 instead of 17?

03-11 10:24:44.286: I/System.out(2978): 0-3-2012

Answer 1

Here’s a snippet the doesn’t use deprecated methods anymore, fixes naming issues and simplifies the output.

    Date datearr = null;
    DateFormat df1 = new SimpleDateFormat("dd-MM-yyyy");
    String dataa = "17-03-2012";
    try {
        datearr = df1.parse(dataa);
    } catch (ParseException e) {
        Toast.makeText(this, "err", 1000).show();
        return;  // do not continue in case of a parse problem!!
    }

    // "convert" the Date instance to a Calendar
    Calendar cal = Calendar.getInstance();
    cal.setTime(datearr);

    // use the Calendar the get the fields
    int dPDMonth = cal.get(Calendar.MONTH)+1;
    int dPDDay = cal.get(Calendar.DAY_OF_MONTH);
    int dPDYear = cal.get(Calendar.YEAR);

    // simplified output - no need to create strings
    System.out.println(dPDDay+"-"+dPDMonth+"-"+dPDYear);