Searched on Google with the first line of a JAVA stack trace?

We can recommend more relevant solutions and speed up debugging when you paste your entire stack trace with the exception message. Try a sample exception.

Recommended solutions based on your search

Solutions on the web

java.lang.NullPointerException: 	at student.Undergraduate.add(Undergraduate.java:156)	at student.StudentAppDriver.addStudent(StudentAppDriver.java:102)	at student.StudentAppDriver.start(StudentAppDriver.java:30)	at student.StudentAppDriver.main(StudentAppDriver.java:20)