Things are getting a little complicated. It would be good to look at some details.

1. An ArrayList of entries is constructed
2. Several Entry objects are put into the list.
3. A target Entry object is created.
4. The indexOf() searches for the target in the list.
   • The equals(Object) method of Entry is used.
   • The picture shows the third comparison (which returns true).
5. A match is found at cell number 2

The indexOf(Object) method is a member of the ArrayList, but it uses the equals(Object) method of Entry.

Question 27:
Would playing with the program help?