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K&B chapter 3 Question 7 enum.values() method

Rageni Kalra
Greenhorn

Joined: Jan 29, 2014
Posts: 10
Hi,

I am really getting confused while comparing functionality of Enum's .values() method in Q7 of Chapter 3 Versus enum example in Chapter 1 page 64.
Please help..

Q7:



Here Suits.values() gives a reference value like @bf73fa

Example :



Which produces:
8
BIG 8
HUGE 10
OVERWHELMING 16

Why in the example, BIG,HUGE.. are printed and in Q7 a reference value is printed? what am i missing here?
Jelle Klap
Bartender

Joined: Mar 10, 2008
Posts: 1821
    
    7

The enum tutorial over at Oracle states:
Enum Types Tutorial wrote:
Java programming language enum types are much more powerful than their counterparts in other languages. The enum declaration defines a class (called an enum type). The enum class body can include methods and other fields. The compiler automatically adds some special methods when it creates an enum. For example, they have a static values method that returns an array containing all of the values of the enum in the order they are declared. This method is commonly used in combination with the for-each construct to iterate over the values of an enum type.

Now that we've established that the values() method returns an array, take a look at the two code samples you provided and look at how they handle the return value of the call to the values() method. Can you explain what's happening in either case?


Build a man a fire, and he'll be warm for a day. Set a man on fire, and he'll be warm for the rest of his life.
Rageni Kalra
Greenhorn

Joined: Jan 29, 2014
Posts: 10
Now when you say it like that, i feel so stupid
Q7 is just printing the array reference and in the example, we are iterating over the array returned by .values()

thanks alot
Richard Hayward
Ranch Hand

Joined: Feb 15, 2012
Posts: 69
    
    1
Rageni Kalra wrote:



Here Suits.values() gives a reference value like @bf73fa


Although, as it stands, it won't compile. There is a printing error in the book at line 16. It should use the getValue() method.
 
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