import javax.swing.*;   // needed for prompting for input
      // here is a possible template, but details are up to you
public class Homework2 {
    public static void main(String[] args) {
    // call the TestNumber class.  
    }
}
// note that these classes cannot be public OR private

class TestNumber {
   // call and test the Number class, building an array of Numbers
}

class Number {

}