Cast between an interface and a nonfinal object. : Reference Type Casting « Type Casting « SCJP

1. SCJP
2. Type Casting
3. Reference Type Casting

public class MainClass {
  public static void main(String[] argv) {

    MyClass[] classArray = new MyClass[3];
    MyInterface[] interfaceArray = (MyInterface[]) classArray;

  }
}

interface MyInterface {
  public void aMethod();
}

interface MySubInterface extends MyInterface {
  public void bMethod();

}

class MyClass implements MySubInterface {
  public void aMethod() {
  }

  public void bMethod() {
  }
}