How do i check null pointer exception in DATE data type

Question

We have Talend Data Integration tool which uses eclipse code while sending the info from source to target system. Getting error

Exception in component tMap_1

    java.lang.NullPointerException
        at bigdata.copy_of_readsysproandsendmail_0_1.Copy_of_ReadSysproAndSendMail.tJDBCInput_2Process(Copy_of_ReadSysproAndSendMail.java:1937)
        at bigdata.copy_of_readsysproandsendmail_0_1.Copy_of_ReadSysproAndSendMail.runJobInTOS(Copy_of_ReadSysproAndSendMail.java:5086)
        at bigdata.copy_of_readsysproandsendmail_0_1.Copy_of_ReadSysproAndSendMail.main(Copy_of_ReadSysproAndSendMail.java:4885)

        at bigdata.copy_of_readsysproandsendmail_0_1.Copy_of_ReadSysproAndSendMail.tJDBCInput_2Process(Copy_of_ReadSysproAndSendMail.java:2098)
    at bigdata.copy_of_readsysproandsendmail_0_1.Copy_of_ReadSysproAndSendMail.runJobInTOS(Copy_of_ReadSysproAndSendMail.java:5355)
    at bigdata.copy_of_readsysproandsendmail_0_1.Copy_of_ReadSysproAndSendMail.main(Copy_of_ReadSysproAndSendMail.java:5154)
Job Copy_of_ReadSysproAndSendMail ended at 23:16 03/10/2016. [exit code=0]

Input :

Date data type is source of null values in tmap component

DNDB date type(source) ---->row1.DNDB(output) is Date data type. both are nullable.

We tried : But did not work for us.

To avoid null
row1.DNDB==null?"null":row1.DNDB

Answer 1

row1.DNDB==null?"null":row1.DNDB can't work : you are assigning to the output value either "null" (a string, with the double quotes) or row1.DNDB , which should be a date. You will have a cast exception in compilation.

You can try either :

Relational.ISNULL(row1.DNDB)?null:row1.DNDB

if you want a Date return type ; or

Relational.ISNULL(row1.DNDB)?"null":TalendDate.formatDate("yyyy-MM-dd HH:mm:ss",row1.DNDB) 

if you want a String return type for both values.

Also check that your output column is marked as nullable (checkbox)