— Scott McNealy, Sun Microsystems Chairman, President and ceo

yes
6. Must the class of the objects stored in 
myArrayList
implement 
Comparable
?
no
7. Must the class of the objects stored in 
myArrayList
implement 
Comparator
?
no
8. What must the class of the 
myCompare
object implement?
Comparator
9. What method must the class of the 
myCompare
object implement? 
compare( )
Exercise Solution
Possible Answers:
Comparator,
Comparable,
compareTo( ),
compare( ),
yes,
no
fill-in-the-blank 
solution

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collections 
with 
generics
you are here
4
579
BE the compiler solution
❑
ArrayList dogs1 = new ArrayList();

❑
ArrayList animals1 = new ArrayList();

 
❑
List list = new ArrayList();
❑
ArrayList dogs = new ArrayList();
❑
ArrayList animals = dogs;
❑
List dogList = dogs;
❑
ArrayList