Run:

---%<---
public class CaS_CCE {
    public static void main(String[] x) {
        try {
            Object o = "";
            Integer i = (Integer) o;
        } catch (ClassCastException e) {
            System.out.println(e.getMessage());
        }
        try {
            Object o = "";
            Integer i = Integer.class.cast(o);
        } catch (ClassCastException e) {
            System.out.println(e.getMessage());
        }
        try {
            Class<?> c = String.class;
            Class<? extends Integer> i = c.asSubclass(Integer.class);
        } catch (ClassCastException e) {
            System.out.println(e.getMessage());
        }
    }
}
---%<---

I get:

---%<---
java version "1.7.0-ea"
Java(TM) SE Runtime Environment (build 1.7.0-ea-b04)
Java HotSpot(TM) Client VM (build 1.7.0-ea-b04, mixed mode, sharing)

java.lang.String cannot be cast to java.lang.Integer
Cannot cast java.lang.String to java.lang.Integer
class java.lang.String
---%<---

That last message is not too helpful. #6456938 fixed the second one.