Java Programming: 5 - Variable Scope

In this tutorial, I explain the basics of scope.

A variable declared outside of any method with the static keyword is called a class variable, and is available to all methods in the class (variables without the static keyword are called instance variables, and will be covered with object-oriented programming in future tutorials).

A variable that is declared inside of a method is local to that method, and only exists until that method is finished executing. It is not directly available to any other methods in the class.

[leereevebuchanan]

You pronounce words so clearly, you leave pauses to let things sink in. Your video was specific to the title. I really appreciate the effort you made. Thank you

[Frazful]

I agree with this. I switched majors, gave up on Computer Science and now I am thinking on minoring in it. Your videos are encouraging me to do it.

You and others on youtube shame both myself and most teachers in the system.

[basalduat]

The best Java tutorials I have found on YouTube. Excellent!
Although I wish you would enlarge the editor's font size. Those of us who have poor eyes need large font sizes. 24 pt is a good size for me.

[ATCoffey]

Your videos have already taught me more for java programming than my teacher has Since the beginning of August.

[abdur]

All Concepts = Cleared! Thanks a lot for your fantastic efforts. To the point vidoes, no time wasting and you've got a very nice and calm voice too. Keep it up! really helpful videos.

[maxpayne]

That's why so important watch more than one tutorial. I didn't know we can call another method without create a new object. Nice job Charlie.

[lowaiistan]

Dude, just from your videos I can tell you are a mechanically clean and efficient coder, dont appreciate all the fancy stuff but like crisp smooth running code that looks neat and tidy, lmao cheers mate you have made the life of us Comp Sci undergrads better

[rockyk]

the only programming video that didnt want to make me kill myself
makes sense and ur a great teacher! :)

[swaminathavijayaraj]

Fantastic, Very Clear Tutorial, I will promote to my friends too. :)
Thanks

[emanuelsantos]

That's very helpful!
Thank you so much for the video!

[JMRpink]

Although the voice is not-enthusiastic, thank you for clearing things up!

[liunxnss]

Hi
the tutorial look awesome ; is there link to download the source code for each example?

Thanks

[venu]

One question here. I see x is printed out only 2 times but I expected 3 times because its being called thrice. Please clarify.

[CodeMonkeyCharlie]

It is 6:32 long. There may have been a problem with YouTube when you viewed?

[ryanrazer]

Lets say you have method, and we know methods start with {
and end with }
If you have a variable inside that curly brackets { int x = 1;}
you can't use that x outside of that method... Curly brackets are the boarder and variable can not be used outside of them, ..
with static variable declared before any method, you can use that variable anywhere inside that class... I hope i got that right and you understood.. :)

[ToTCaMbIu]

what is the point of static in variable declaration?

[abdallahsamer]

why when we write int x without static don't work ?
thanks

[arberkuci]

Hello, can someone tell me something, if i need to use a field in any other class is there a way to do this ? :)

[ryanrazer]

static variable:
It is a variable which belongs to the class and not to object(instance).
A static variable can be accessed directly by the class name and doesn’t need any object
Syntax : (class-name).(variable-name)
Meaning you do not have to make an object of a class to use/call it.
It also means you can access that variable form any method, but you have to declare and initialize it before main method like he did. You can't use variables in other methods... continue in next comment

[audreymciver]

At this point someone knows all of my passwords to every site.