Need help with my first program

I have just finished my first year at Uni and one of my modules next year is Java so i thought i would get a head start and learn the basics now.

I have download the latest version of the development java environment. I am starting with Hello World program.

Code:

---

class Hello
{
        public static void main ( String[] args )
        {
                System.out.println( "Hello World!" ) ;
        }
}

---

The program complies using javac in the command prompt and creates the file Hello.class but then when I try and run the program via

Code:

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java Hello

---

.

Then the following message comes up and I don't know why.

http://img191.imageshack.us/img191/1816/errorahu.jpg

Thank you to anyone that can help me!

Does it help if you do:

Code:

---

java -cp . Hello

---

(assuming that a file Hello.class exists in the current working directory).

kind regards,

Jos

Also could you do enter a dir command to show the files in the Java folder.

Quote:

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Originally Posted by JosAH

Does it help if you do:

Code:

---

java -cp . Hello

---

(assuming that a file Hello.class exists in the current working directory).

kind regards,

Jos

---

That worked. But could explain what is doing? Thanks

It specifies the class path to look in for the file. You can set this in your environment variables to always look at certain paths, some people don't like to do this and prefer to use the -cp flag.

One dot "." refers to the current working directory.

Thank you that is making a bit more sense now!