CODEWITHSUNDEEP
javaandroidexception
tarun713
tarun713

Reputation: 2187

Parsing String to Calendar in Java?

I am having trouble parsing a string to a calendar object in java by pulling it from an XML element (I'm writing an android app) so I can calculate the length of time between the time in the string and the current time. I am brand new to java and come from the .NET world, so any additional background here can be really helpful.

The code I am trying to use is:

// Using this class to define the format for date parsing.
SimpleDateFormat sdf = new SimpleDateFormat("yyyymmdd HH:mm:ss", Locale.ENGLISH);

// readArrivalValue reads the element from XML, which seems to be working.
String prdt = readArrivalValue(parser, "prdt");
// At this point prdt evaluates to the correct value: "20150331 20:14:40"

Date datePRDT = sdf.parse(prdt);
// datePRDT doesn't seem to be set properly. It evaluates to:
//    datePRDT = {java.util.Date@830031077456}"Sat Jan 31 20:14:40 CST 2015"
//      milliseconds = 1422761216000

// element.prdt is of type Calendar. Nothing is done to this prior to this statement.
element.prdt.setTime(datePRDT); // This throws a null pointer exception

Upvotes: 1

Views: 336

Answers (1)

Ravi K Thapliyal
Ravi K Thapliyal

Reputation: 51711

Two issues with your code:

  • Fix your SimpleDateFormat pattern as you're parsing minutes mm in place of months MM too!

    new SimpleDateFormat("yyyyMMdd HH:mm:ss", Locale.ENGLISH);
                          ^

  • You most likely forgot to initialize your Calendar instance and hence get an NPE.

    element.prdt = Calendar.getInstance();
element.prdt.setTime(datePRDT);

Upvotes: 1

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