I have received Exception in
thread "main" java.lang.NoSuchMethodError: FamilyTree.grandchildren when runing my code.
In my FamilyTree.class, I did write a grandchildren() method, I don't understand why is it saying no such method.
In order to run the FamilyTree.class, just compiled the FamilyTree.java and download Record, Person.class, Main.class and Birthday.class from
http://www.ecst.csuchico.edu/~jhliang/csci111/lab6/lab6.html In the console type in
java Main restore
Please help me out? Thanks