/* The MyDate class  implements an application that
* displays "Hello World!" to the standard output.
*/
public class MyDate {
public static void main(String[] args) {
// Display "My Date!"
System.out.println("My Date!");
}
}

that is strange ... have you set the classpath and the path correctly ?
is your java file name is MyDate.java ?
dan what is the error that shown in your monitor ?

It seems to me you are missing fundamental steps of
programming such as the pathway for system to
recognize your work not the system works, ie. import
or package statements. Unless you already defined on
top of the program which is not showing here.

The problem is that when I go into DOS to run it, I can't find it. I
saved it as MyDate.java,but it can't find it. i'm not sure what i
did wrong.

The previous E-mail supposes to follow after this one.
You need to log in Sun Java source website and study
the create  system path according to your OS.