public class Unchecked<T extends Exception> {

    @SuppressWarnings("unchecked")
    public static void uncheckedThrow(Exception exception) {
        Unchecked<RuntimeException> asUnchecked = new Unchecked<RuntimeException>();
        Unchecked raw = asUnchecked;
        raw.t = exception;
        asUnchecked.throwIt();
    }

    private T t;

    public void throwIt() throws T {
        throw t;
    }

    public static void main(String[] args) {
        Exception checked = new Exception();
        uncheckedThrow(checked);
    }
}