How to import classes in a package?

I am importing all the classes in a package like:
import packagename.*;
when i am trying to create an object of the class in that package it was showing error...
example.java:8: cannot access address
bad class file: .\address.java
file does not contain class address
Please remove or make sure it appears in the correct subdirectory of the classpa
th.
address add = new address();
^
1 error
Below is my code....
import java.util.*;
import org.demo.*;
public class example
     public static void main(String[] args)
          address add = new address();
          System.out.println("Address object created...");
}

class name address.class
I am creating object as
address add = new address()
but it was showing the error

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