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via GitHub by roam
, 11 months ago
A book has a null property
via Stack Overflow by Ashok Kumar N
, 3 months ago
A book has a null property
via GitHub by roam
, 2 years ago
A book has a null property
java.lang.IllegalStateException: A book hasa null property at com.example.myproject.Author.getBookIds(Author.java:38) at com.example.myproject.Bootstrap.main(Bootstrap.java:14)Caused by: java.lang.NullPointerException at com.example.myproject.Book.getId(Book.java:22) at com.example.myproject.Author.getBookIds(Author.java:35) ... 1 more