Java Programming Tutorial - 1 - Installing the JDK

What's going on everybody? It's Bucky and
welcome to your very first Java tutorial.

Now in this tutorial, before we begin
writing any programs, we first need to

download something called the JDK. And
for all you new Java developers out there,

this is the program that let's you
actually write Java

and actually compile it.

And compile just means - uh -
transferring it from code you can

understand to code the
computer can understand.

So - uh - just follow me and by the end
you'll be able to write Java code.

So the first thing I need you to do is to
go ahead and

open up your Internet browser right here.

And once you have that open,
I'm going to use Firefax - uh Firefox -

go ahead and go to the website
java.sun.com.

And this is going to give you
Java's main page.

What you want to look for is the
download link and this is

going to give you a bunch of different
Java additions to download.

You're going to want to go to the
Java SE link.

This stands for Java Standard Edition.
So go ahead and click that.

And what we're looking for is something
called the JDK.

This stands for the Java Development Kit
so we can write and - uh, well -

compile Java programs.

Now we just want the top one
which is the standard one.

This EE stands for Enterprise Edition
and this NetBeans is something else,

we don't want that.

Just go ahead and find the
standard basic edition and click download.

And once you click that it's probably
going to bring you to a new page

- uh - let's see.

Yep, it's going to say 'Windows'
which we want and 'English' which we want.

Go ahead and agree and press continue.

Um - I already have this downloaded
so I'm not going to download it again,

that would just be stupid.

But once you download it,
it's going to give you an executable file.

Now, your executable file is going to
look something like one of these.

This is something else I downloaded but
it's going to give you a file like this,

called .exe.

Once you get that file,
go ahead and double click this.

And that's going to start the wizard to
download the JDK.

Now it also might give you a
file on your desktop right here.

Like, put it somewhere right here.
If it's right there,

then just double-click that.
And once you do,

a wizard is going to pop up and
you're probably going to have to click

'Next' forty times and
press 'I agree', 'I agree' to some stuff,

'Next', 'Next'.

But once that's all done, then you're
going to have the Java compiler

downloaded. Now let me show you guys
what the Java compiler is.

If you go to your start menu,
then press 'cmd' and press enter,

your command prompt is going to come up.

Now, what this allows you to do,
is have access to your Java compiler.

And again, like I said before, the
Java compiler allows you to transfer code

that you can understand to
code the computer can understand.

And that's what we just downloaded.

So, let's test it out.

javac

Press enter, nothing's working.
And nothing's working

because the Java compiler,

um - it has it downloaded but whenever you
try and use it,

it doesn't know where it is.

So let me show you guys how to do that.

And again,
pay very close attention to this.

Hopefully you downloaded it with
all the default settings.

Um, if you didn't, well you'll still be
able to see what's going on.

But, go ahead and in your start menu,
click on 'Computer'.

Now go ahead and click the local disk,
or whatever your main hard drive is,

then go ahead and click 'Program Files'.

Now you should have a folder
called 'Java', go ahead and click that.

Now go ahead and click the version JDK.
If you don't see this it means

you didn't download it right.

So go ahead and click that, JDK.

The next thing and last thing I want you
guys to do is click on the thing

that says 'bin', right here.

And remember you follow all these
instructions very carefully.

Next, right-click on any of these things
right here.

Just click on your top-most one.
Remember, right-click it.

And click 'Properties'.

Now this is where you're going
to tell Java to look for your compiler.

So it says 'Location'.
Go ahead and copy all of 'Location'.

Right-click it and copy it.

It should say something like
C:\Program Files\Java\[your version]\[bin]

The last thing,
make sure you get that 'bin'.

It's very important, if you don't see it,
do this tutorial again

and do exactly as I say.

Anyways, you want to see that 'bin'.

So once you have this golden code,
that's what we're looking for,

go ahead and 'X' out of that.

Now that's where the compiler is. So how
do we tell your computer to look there?

Well go ahead and [right] click
'My Computer' again, from the start menu.

And click 'Properties'. Remember, you
want to right-click it and click

'Properties'.

All these are very important.

Go ahead and click
'Advanced System Settings'.

And probably a little message is going
to pop up. If my computer is not freezing.

And it is so...

'My Computer'. 'Properties'.
'Advanced System Settings'.

There we go. Continue.

And you're going to see something in your
'System Properties'

called 'Environment Variables'.

Go head and click that.

And pay attention to what
I'm going to do here.

What we want to do is create
a new user variable.

Go ahead and click 'New'.

Now the variable name for this,
you have to write 'Path'.

P. A. T. H.

And the variable value is going
to write where that compiler is.

Remember, that link with the 'bin'.
That's why it's really important

you get that link.

Now go ahead and click 'OK'.

And, bam. Click 'OK' on this.

Okay, you now have your compiler set up
and ready to run.

So go ahead and go back to your
command line.

And in command line,
go ahead and type 'javac'.

And, unlike before, we now have a bunch
of crap that pops up.

And this crap means that our compiler
is ready and set and ready to go.

So now, with that being said, we know that
we're now able to write Java programs.

So in the next tutorial,
I'll show you guys how to do that.

But for now, just follow this tutorial.

Um, that's how you install Java on your
computer so you can actually

write Java programs.

If you didn't follow those instructions
exactly like I said,

um - you're not going to be able to
write Java programs on your computer.

So make sure you follow this tutorial
very carefully and do exactly as I did.

I know it's kind of a pain in the butt
but it will be worth it in the long run.

So thank you guys for watching,
make sure you get Java installed.

If you have any questions,
or I wasn't clear on anything,

just send me a message.

Or leave a comment and
hopefully I'll get back to you.

So again, thank you guys for watching.
Hopefully you have Java installed.

And in the next tutorial,

I'll show you guys how to write
a first Java program.

So thank you,
don't forget to subscribe to my channel.

I'll see you in the next tutorial.