Java Generics: Comparing the class of Object o to <E>

public class Test<E> {
    public boolean sameClassAs(Object o) {
    	// TODO halp!
    }
}

Test<String> test = new Test<String>();
test.sameClassAs("a string"); // returns true;
test.sameClassAs(4); // returns false;

public class Test<E> {
    private final Class<E> clazz;
    public Test(Class<E> clazz) {
        if (clazz == null) {
            throw new NullPointerException();
        }
        this.clazz = clazz;
    }
    // To make things easier on clients:
    public static <T> Test<T> create(Class<T> clazz) {
        return new Test<T>(clazz);
    }
    public boolean sameClassAs(Object o) {
        return o != null && o.getClass() == clazz;
    }
}

public class Test<E> {
    private Class<E> clazz;
    public Test(Class<E> clazz) {
       this.clazz = clazz;
    }
    public boolean sameClassAs(Object o) {
        return this.clazz.isInstance(o);
    }
}

public class Test<E> {

    private E e;

    public void setE(E e) {
        this.e = e;
    }

    public boolean sameClassAs(Object o) {

        return (o.getClass().equals(e.getClass()));
    }

    public boolean sameClassAs2(Object o) {
        return e.getClass().isInstance(o);
    }
}

public boolean sameClassAs(Object o) {
    boolean same = false;
    try {
        E t = (E)o;
        same = true;
    } catch (ClassCastException e) {
        // same is false, nothing else to do
    } finally {
        return same;
    }
}