Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'long java.util.Date.getTime()' on a null object reference in Android

Question

I want to convert strSqliteDate﹕ = 2016-01-14 05:34:50 PM into 2016-01-14 .After converting all dates my application was crash and getting error of

02-01 12:03:15.204    7619-7619/com.example.tazeen.classnkk W/System.err﹕ java.lang.NullPointerException: Attempt to invoke virtual method 'int java.lang.String.length()' on a null object reference
02-01 12:03:15.204    7619-7619/com.example.tazeen.classnkk W/System.err﹕ at java.text.SimpleDateFormat.parse(SimpleDateFormat.java:1035)
02-01 12:03:15.204    7619-7619/com.example.tazeen.classnkk W/System.err﹕ at java.text.DateFormat.parse(DateFormat.java:577)

At this line date = dateFormat.parse(strSqliteDate);

and second getting error at this line = calendar.setTime(date);

Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'long java.util.Date.getTime()' on a null object reference at java.util.Calendar.setTime(Calendar.java:1195)

Here is date conversion code in DBhelper class

String strSqliteDate = cursor.getString(cursor.getColumnIndex("ActionDate"));
                Log.e(" strSqliteDate "," = " + strSqliteDate);

                String result = "";
                Date date = null;
                DateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd");
                try
                {
                     date = dateFormat.parse(strSqliteDate);
                }
                catch(Exception e)
                {
                    e.printStackTrace();
                }
                Calendar calendar = Calendar.getInstance();
                calendar.setTime(date);
                SimpleDateFormat printFormat = new SimpleDateFormat("yyyy-MM-dd");
                result = printFormat.format(calendar.getTime());
                Log.e("result = ","==========>"+result);

http://stackoverflow.com/a/3930115/5456493 – Abhishek Feb 01 '16 at 06:46 — Abhishek, Feb 01 '16 at 06:46

score 5 · Accepted Answer · answered Feb 01 '16 at 06:47

Before Use variable strSqliteDate check whether it is null or not?

String strSqliteDate = cursor.getString(cursor.getColumnIndex("ActionDate"));
if(strSqliteDate != null && !strSqliteDate .isEmpty())
{

  Log.e(" strSqliteDate "," = " + strSqliteDate);

            String result = "";
            Date date = null;
            DateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd");
            try
            {
                 date = dateFormat.parse(strSqliteDate);
            }
            catch(Exception e)
            {
                e.printStackTrace();
            }
            Calendar calendar = Calendar.getInstance();
            calendar.setTime(date);
            SimpleDateFormat printFormat = new SimpleDateFormat("yyyy-MM-dd");
            result = printFormat.format(calendar.getTime());
            Log.e("result = ","==========>"+result);
}

IntelliJ Amiya · Answer 2 · 2016-02-01T07:11:01.440

Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'long java.util.Date.getTime()' on a null object reference at java.util.Calendar.setTime(Calendar.java:1195)

According to your Question ,You should use substring() & Do check your database is null or not .

This method has two variants and returns a new string that is a substring of this string. The substring begins with the character at the specified index and extends to the end of this string or up to endIndex - 1 if second argument is given.

.substring(startIndex, endIndex);

strSqliteDate = 2016-01-14 05:34:50 PM

System.out.println(strSqliteDate.substring(0, 11) );

score 0 · Answer 3 · answered Feb 01 '16 at 06:47

0

Use the subString method refers Refers link

strSqliteDate.subString(0,10)

Output will be==>> 2016-01-14

answered Feb 01 '16 at 06:47

Ravindra Kushwaha

7,846
14
53
103

score 0 · Answer 4 · edited Feb 01 '16 at 06:50

0

Your date = dateFormat.parse(strSqliteDate); strSqliteDate is null that is why u are getting NPE

edited Feb 01 '16 at 06:50

Ravindra Kushwaha

7,846
14
53
103

answered Feb 01 '16 at 06:49

JAAD

12,349
7
36
57

NEERAJ GUPTA · Answer 5 · 2016-02-01T07:19:47.790

0

At line

result = printFormat.format(calendar.getTime());

pass the reference of Date class in the argument of formate()..

edited Feb 01 '16 at 07:19

answered Feb 01 '16 at 06:54

NEERAJ GUPTA

125
1
11

Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'long java.util.Date.getTime()' on a null object reference in Android

5 Answers5