What is "A"? You are trying to create an object of type "A", but from the code you have posted, no such class exists...

im not really good in making classes.. some gave this to me but i don't fully understand...

this is the code i guess...

public class Greeting{
private String Salutation;

Greeting (String s){
Salutation = s;
}

public void greet (String whom){
System.out.println (Salutation + " " + whom);
}
}

together with this one...

public class TestGreeting{

public static void main (String[] args){

Greeting Hello = new Greeting ("Hello");

Hello.greet ("World!");
}
}

please help me on this... tnx...

Is there a problem with that second example?

It looks unrelated to your original post, what exactly do you need me to help you with?

Now how are we supposed to help you on this information given by you ???
If you are not good at creating classes, I recommend you purchase a good book like "Head First Java" or something similar which till teach you object oriented programming along with Java.
Also the "Starting Java" thread at the top as the name suggests has been created specifically for users like yourself who are just begining to do programming.

Also asking questions like the one above and asking us to fix it will only make you more dependent on others to get your work done and if you intend making a career in this field, I am pretty sure you do not want that.

propably the wrong part is that you do not have a class A, so you're trying to instantiate and use an object type that doesn't exist.
create the class and try it again

thanks anyway, and Advance Merry Christmas....

ok i'll try....

the second problem seems to be ok by me
to run the code simply use
javac TestGreeting.java
then
java TestGreeting
it should run with out any problem

the second problem seems to be ok by me
to run the code simply use
javac TestGreeting.java
then
java TestGreeting
it should run with out any problem