I can't run a Java program

Question

I was starting to learn Java. I followed the tutorial on how to install it. I also checked by typing "javac"(without the quotation marks) in cmd if it works. And yes it gives a whole list of text which means its supposed to work, right?

This is my java code:

class apples{
    public static void main(String args[]) {
        System.out.printIn("hello youtube");
    }
}

I saved it in a folder called 'test' in my c drive. This is what I typed in cmd:

cd \
dir

now it lists everything in my c drive and one of them is test

cd test
dir

Now it lists everything in test and one of them is 'youtube.java'(the file I named), so I type

javac youtube.java

This doesn't work This is what it gives me:

youtube.java:3: error: cannot find symbol
System.out.printIn("hello youtube");
symbol: method printIn(string)
location: variable out of type PrintStream
1 error

Can someone help me out with this?

Well, there's no such thing as printIn in Java, so I'd say that error is 100% accurate. — Brian Roach
– Brian Roach, Commented Jul 11, 2013 at 19:13
I think downvoting the question is a bit mean, we were all beginners once — NickJ
– NickJ, Commented Jul 11, 2013 at 19:14
@NickJ I agree The question contains good content and its clear what the question is. I do not understand the downvotes — chancea
– chancea, Commented Jul 11, 2013 at 19:16
The real answer is that the OP should be starting with a good beginner's book on Java, or the Oracle tutorials. — Brian Roach
– Brian Roach, Commented Jul 11, 2013 at 19:18
SO should introduce a mandatory comment section for downvotes — Reimeus
– Reimeus, Commented Jul 11, 2013 at 19:34

rgettman · Accepted Answer · 2013-07-11 19:12:13Z

11

You have a typo in your call. Change

System.out.printIn("hello youtube");  // capital 'I'

to

System.out.println("hello youtube");  // lowercase 'l'

And as has been mentioned already, in Java, the public class in a file must match the filename.

answered Jul 11, 2013 at 19:12

rgettman

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2 Comments

rgettman Over a year ago

Some fonts make such characters appear identical.

nanofarad Over a year ago

@rgettman I wish SO would use this ugly font.

nanofarad · Accepted Answer · 2013-07-11 19:12:23Z

0

The name of the class must match the filename.

You should use

public class Youtube{

in your code(as class names are capitalized) and call the file Youtube.java.

Also you used In instead of ln.

Use:

System.out.println(

which means "print line to System.out".

answered Jul 11, 2013 at 19:12

nanofarad

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1 Comment

Rohit Jain Over a year ago

Well, you just saved us from a soon to come question. Not completely though. Class name should be public.

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