Java Programming

i'm currently using the textpad ide

all my java files are in one folder

i use java *1.4.2_16*

and these are the codes:

Main.java:

public class Main {

	public static void main(String[] args) {
		HelloWorld hw = new HelloWorld();
	}
}

HelloWorld.java:

public class HelloWorld {

	public HelloWorld() {
	}

	public void disp() {
		System.out.println("Testing");
	}
}

the errors:

C:\Documents and Settings\Administrator\Desktop\test\Main.java:4: cannot resolve symbol
symbol  : class HelloWorld
location: class Main
		HelloWorld hw = new HelloWorld();
                ^
C:\Documents and Settings\Administrator\Desktop\test\Main.java:4: cannot resolve symbol
symbol  : class HelloWorld
location: class Main
		HelloWorld hw = new HelloWorld();
                                    ^
2 errors

help please
thanks! :)