I am designing a staff data manager which will allow the users to add, edit and view the staff details.
In the code I have a JFormattedTextField
defined as follows.
SimpleDateFormat dateDOB = new SimpleDateFormat("dd/MM/yyyy");
JFormattedTextField DOBBX = new JFormattedTextField(dateDOB);
When I want to edit the staff data, I load the date to the JFormattedTextField as follows:
DOBBX.setText(""+retrievedStaff.getDOB());
After editing if I save the data, the value for DOB is null and I get a java.lang.NullPointerException
. This only happens if I leave the value for DOB unedited. If I make changes to DOB or enter it again then DOB value is correctly saved.
Also if I add a new staff and then try to edit the staff data without closing the program, the date is properly saved to the binary file with no nullpointer error.
How do I fix this?
(I have no idea how to provide an MCVE for this as my code is quite long and consists of many classes)
Before saving the date to binary file I use the following method to convert it to a string:
public String getDOB() {
SimpleDateFormat df = new SimpleDateFormat("dd/MM/yyyy");
try{
String textDate = df.format((DOB));
return textDate;
}catch(Exception e){e.printStackTrace();}
return null;
}
In the StackTrace it is mentioned that the error is produced by this part of the code:
String textDate = df.format((DOB));