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I am getting an error when I run my program that says: Exception in thread "main" java.lang.NullPointerException at defaultpackage.GradeBook.setName(GradeBook.java:25) at defaultpackage.GradeBookDemo.readFromFile(GradeBookDemo.java:52) at defaultpackage.GradeBookDemo.main(GradeBookDemo.java:23) I've looked through my program and cannot figure out what is actually wrong. The first class is GradeBook and the second is GradeBookDemo. I have to use …

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