Null Pointer Exception on SimpleDateFormat parse

Question

I am getting date from the calender and converting its format using

    SimpleDateFormat sdf1 = new SimpleDateFormat("MM/dd/yyyy");
    Date date = null;
    try {
        date = sdf1.parse(datevalue);
    } catch (ParseException e) {
        e.printStackTrace();
    }

    if(date != null) {
        Date d = new Date(date.getTime());
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSSZ");
        return sdf.format(d);
    }

    return "";

But I am getting crash on some of devices and for some devices it is working fine.
I don't know why it is happening on some devices only.

I am getting this in Fabric report:

Fatal Exception: java.lang.NullPointerException: Attempt to invoke virtual method 'int java.lang.String.length()' on a null object reference    
       at java.text.SimpleDateFormat.parse(SimpleDateFormat.java:1044)
       at java.text.DateFormat.parse(DateFormat.java:577)
       at com.app.appUtilities.Utilities.convertDateFormat(Utilities.java:34)

Please help me out.

it is initialized in third line as you can see if u have any fair answer then comment — paras kochar, Oct 03 '16 at 07:27
@paraskochar as Bathsheba said, `dateValue` is null in some circumstances. It's a simple NPE and all you've got to do is make sure it isn't null! — Sufian, Oct 03 '16 at 07:38
@Sufain I am getting date in form of mm/dd/yyyy from user and converting this in yyyy-MM-dd'T'HH:mm:ss.SSSZ form how it can be null public static String convertDateFormat(String datevalue) { SimpleDateFormat sdf1 = new SimpleDateFormat("MM/dd/yyyy"); Date date = null; try { date = sdf1.parse(datevalue); } catch (ParseException e) { e.printStackTrace(); } if(date != null) { Date d = new Date(date.getTime()); SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSSZ"); return sdf.format(d); } return ""; } — paras kochar, Oct 03 '16 at 07:43
@paraskochar `datevalue` is a `String`. Check your code. If you're really interested, just check the line 1044 of `SimpleDateFormat.parse()`. — Sufian, Oct 03 '16 at 08:43
datevalue is the string variable having date that I am getting from calender in mm/dd/yyyy format , and this code is working absolutely fine in many android devices — paras kochar, Oct 03 '16 at 08:57
@paraskochar then update your question with the code where you're setting values to `datevalue`. All places where you're assigning something to it. — Sufian, Oct 03 '16 at 10:09

score 1 · Accepted Answer · edited Oct 03 '16 at 08:17

1

    String dateStr = "04/05/2010"; 

    SimpleDateFormat curFormater = new SimpleDateFormat("dd/MM/yyyy"); 

    try {
        dateObj = curFormater.parse(dateStr);
    } catch (ParseException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    } 
    SimpleDateFormat postFormater = new SimpleDateFormat("MMMM dd, yyyy"); 

    String newDateStr = postFormater.format(dateObj); 
    Toast.makeText(getApplicationContext(), newDateStr, 1).show();

edited Oct 03 '16 at 08:17

LaurentY

7,495
3
37
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answered Oct 03 '16 at 07:39

Rajesh kannan

48
4

SimpleDateFormat sdf1 = new SimpleDateFormat("MM/dd/yyyy"); Date date = null; try { date = sdf1.parse(datevalue); } catch (ParseException e) { e.printStackTrace(); } if(date != null) { Date d = new Date(date.getTime()); SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSSZ"); return sdf.format(d); } return ""; – paras kochar Oct 03 '16 at 07:49

Null Pointer Exception on SimpleDateFormat parse

1 Answers1