Newbie Java Programing Problem *Resolved*

Ok im REALLY new to Java like i cant get my first 2 programs FROM a BOOK to work. Here they are:

BigDebt.java

class BigDebt {
public static void main(String[] arguments) {
int debt = 59000000;
debt = debt / 1440;
System.out.println("A Minutes Worth Of Dedt Is: $" + debt);
}
}

Root.java

class Root {
public static void main(String[] arguments) {
int number = 255;
System.out.println("The square root of"
+ number
+ " is "
+ Math.sqrt(number));
}
}

now ive compiled them error free and yet when i goto run the class file in Dos i get this message:

Exception in thread "main" Java.lang.NoClassDefFoundError: Root/class

and thats it.....can ANYONE Help? ive even been on the tutorials from Sun and copy and pasted the hello world program and i have the same error come up

this works for me

Code:

---

'save as BigDebt.java

class BigDebt
{
  public static void main(String[] arguments)
  {
      int debt = 59000000;
      debt = debt / 1440;
      System.out.println("A Minutes Worth Of Debt Is: $" + debt);
  }
}

---

Output was: A Minutes Worth Of Debt Is: $40972

this one also worked

Code:

---

'Save as Root.java

class Root
{
  public static void main(String[] arguments)
  {
      int number = 255;
      System.out.println("The square root of  "
                          + number
                          + " is "
                          + Math.sqrt(number));
  }
}

---

Output was: The square root of 255 is 15.968719422671311

i copied ur pasted code and then recompiled them and am still having no luck, i am running out of ideas

just curious and this may sound stupid but, are you compiling and executing them correctly???
since java is case sensitive.

Code:

---

javac BigDebt.java 'compile it

java BigDebt 'execute it

javac Root.java 'compile it

java Root 'execute it

---

if you are doing the above correctly, what is the error message you are getting?

ok i have figured out the problem, i was adding the file extensions in when i went to run the class files. so i would type:

java Root.class

and not

java Root