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Why Custom Annotation Code Showing NullPointerException when printing the annotation's values

 
Ajharul Abedeen
Greenhorn
Posts: 19
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The following code is custom Annotation code, test but when i am running the code showing error. Please tell me where i have done the error.



It is printing some value but when i am printing the annotation values then it is showing Error. The error has given below.
 
Ron McLeod
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I ran your code as-is (Windows 10 64-bit, Java SE 1.8.0_45) and got this:

Student Details....
Student ID      :s-111
Student Name    :Durga
Student Address :Hyd

Student Course Details
...........................
Course ID :C-333
Course Name :JAVA
Course Cost:30000


Your error suggests that the value of crs, which is the same as the value of a was null (which would the case if the annotation was not present).  Perform a check before you start using the reference to the annotation to make sure it is not equal to null.

Also, you might want to tried building and running from the command line rather than thr IDE to see if any additional warnings or errors are reported.
 
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