An Object reference can be converted to: : Reference Type Casting « Type Casting « SCJP

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

An Object reference
Any class reference with a runtime check
Any array reference with a runtime check
Any interface reference with a runtime check


public class MainClass {
  public static void main(String[] argv) {
    MyClass cl = new MyClass();
    MyInterface i = cl;

  }
}

interface MyInterface {
}

class MyClass implements MyInterface {
}