Java APIs

Can someone explain why there is a need to typecast in the getObject() method? Thank you,

public abstract class GenericTest<T extends GenericTest>
{
    public GenericTest()
    {
    }

    public void getObject()
    {
        T objectOne = getObjectCast();
        T objectTwo = (T) objectOne.getObjectCast();  //why must I typecast here?
    }

    public T getObjectCast()
    {
        return ( T ) new Object();
    }
}