Sets: Java Collections Framework Tutorial Part 5

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How to use sets in Java -- HashSet, TreeSet and LinkedHashSet. In this tutorial I also explain how to find the intersection of two sets and the difference of two sets, as well as the usual stuff - iteration, adding and removing items and so on.
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[amizan]

that's pretty much everything I needed to know about sets all in 15 concise minutes. Thanks for uploading!

[tedchirvasiu]

Thank you very much! Awesome tutorial. The opera music and the very soothing voice makes me picture you like a sloth. A very classy sloth with a monocle and a gentleman hat.

[giomo]

Great job. Thanks to this tutorial, I now know much more about Java Sets and aardvark - a medium-sized, burrowing, nocturnal mammal native to Africa; only living species of the order Tubulidentata.

[bharatbawari]

Really nice, crisp and to the point..thank you very much.

[myhops]

You are the best teacher ever! Even in college my professors could not explain as well as you. Thank you lots John :D

[mateuszalmannai]

Most excellent tutorials. I am speechless.

[Svinqvai]

I know you can iterate over the set with Iterator. When I should use Iterator over foreach loop and vise verse 

[xthmath]

The order i got - it worked nicely 
HashSet: 9 [Cactus, Lilly, Lemon, Apple, Pineapple, Rose, Jute, Banana, Jasmine]
LinkedHashSet: 9 [Apple, Banana, Lemon, Cactus, Jute, Rose, Jasmine, Lilly, Pineapple]
TreeSet: 9 [Apple, Banana, Cactus, Jasmine, Jute, Lemon, Lilly, Pineapple, Rose]

[gabrip]

thank you, on 15 minutes you did what my professor couldn't do, that was explain this subject, IN AN HOUR
thank you very much, feel much more confident for the test now

[GMByteJavaTM]

Thank you! I just realised what a stupid way I used writing my program which compared two text files and then said what the differences between them are. I could use the Set collections instead of ArrayList to avoid a big code with a lot of loops which check what matchs and what doesn't!

[jvsnyc]

The third of the operations, besides intersection, which is symmetrical, set difference, which you showed here, is of course Union. I can immediately think of a couple of ways that we could do it, but you could mention which is the "best" or recommended way of obtaining the union of two sets or "adding" one to the other.

[Jackorer]

dude thanks! helped me out a lot. Exame in two days :D

[Stygianduck]

This damn video amounts to nearly 60% of my exam :D
Thank you.
and I learned what an Aardvark is, which is always a bonus.

[caveofprogramming]

Type sysout and press ctrl+space. Or in Netbeans type sout.

[LifeSuxTR]

this guy is legend.Looking for some videos about building real world projects.(make them paid :)) )

[sahilrally]

Awesome :-). How can we do union of two sets in best efficient way ?

[jakspyder]

This was great thank you. Really helped me understand the concept of sets! You're saving me on this late assignment!

[larn]

you can use the diamond operator with newer version of java

[etelot]

How would you apply this to your own class? I have a employee class that is implementing comparable, but when I try to add(new Employee("Name", 12323, 12, 12, 192), it only add one to the treeset.
I do this: mystreeset.add(new Employee("name", salary, hireday); many times, but when I print it only the first one get printed out, and the size is also only one. Any idea?

[carlhopkinson]

If your code is dependent on properties not defined in the interface but only the implementation, you shouldn't abstract away that information by referring to an
implementation instance by its interface.