cannot resolve symbol help

ok im a java newbie and need a bit of help

what im trying to do is take input from the user and send that to a class named cube where it takes the inputed value, and calculates the area and perm

publicclass CubeUser{

publicstaticvoid main (String[] args)throws IOException{

BufferedReader input =new BufferedReader (new InputStreamReader ( System.in));

String inputString;

double cube1, cube2, cube3;

System.out.println("We are going to create 3 different cubes");

System.out.println("Please enter the first cubes side:");

inputString = input.readLine();

cube1 = Double.parseDouble(inputString);

Cube Hope1 =new Cube(cube1);

System.out.println("Please enter the second cubes side:");

inputString = input.readLine();

cube2 = Double.parseDouble(inputString);

Cube Hope2 =new Cube(cube2);

System.out.println("Please enter the third cubes side:");

inputString = input.readLine();

cube3 = Double.parseDouble(inputString);

Cube Hope3 =new Cube(cube3);

System.out.println("Cube1: " + Hope1.toString());

System.out.println("Cube2: " + Hope2.toString());

System.out.println("Cube3: " + Hope3.toString());

}

}

however when i complie it i get these errors:

CubeUser.java:24: cannot resolve symbol

symbol : class Cube

location: class CubeUser

Cube Hope1 = new Cube(cube1);

^

CubeUser.java:24: cannot resolve symbol

symbol : class Cube

location: class CubeUser

Cube Hope1 = new Cube(cube1);

^

CubeUser.java:28: cannot resolve symbol

symbol : class Cube

location: class CubeUser

Cube Hope2 = new Cube(cube2);

^

CubeUser.java:28: cannot resolve symbol

symbol : class Cube

location: class CubeUser

Cube Hope2 = new Cube(cube2);

^

CubeUser.java:32: cannot resolve symbol

symbol : class Cube

location: class CubeUser

Cube Hope3 = new Cube(cube3);

^

CubeUser.java:32: cannot resolve symbol

symbol : class Cube

location: class CubeUser

Cube Hope3 = new Cube(cube3);

why is it giving me these errors?

[2901 byte] By [addona] at [2007-10-2 1:39:37]
# 1
Because it can't find your Cube class.
paulcwa at 2007-7-15 19:03:07 > top of Java-index,Developer Tools,Debugging and Profiling Tool APIs...