@Entity
public class Parent {

   //...

    private Child child1 = new Child ();

    @Embedded
    public Child getChild1() {
        return child1;
    }

    public void setChild1 (Child child1) {
        this.child1 = child1;
    }

}

@Embeddable
public class Child {

   private Parent parent;

   // How do I make parent the parent, instead of a parent?
   public void getParent() { return parent; }
   public void setParent(Parent parent) {this.parent = parent;}

}