Simple Object Oriented Design Example with Java
<p>I'm studing on a project. It's a bank simulation and just for practicing OOP metodologies. 
Here is my code, could you help me about OOD. How can I use inheritance and interfaces on this project?</p>

<pre><code>public class Main {

    public static void main(String[] args) {

        User[] User = new User[10];
        for(int i = 0; i &lt; 10; i++) 
            User[i] = new User(i);

        System.out.print("User Number:");
        Scanner s = new Scanner(System.in);
        int UserNo = 0;
        if(s.hasNextInt())
            UserNo = Integer.parseInt(s.next());

   public void withdraw()

   public void payIn(){

   public void MoneyOrder(){


}
</code></pre>
