public final <T2> Pattern2<T, T2> and(Observable<T2> right) {
        return OperatorJoinPatterns.and(o, right);
    }
public final < T2 > Pattern2 < T , T2 > and ( Observable < T2 > right ) { return OperatorJoinPatterns . and ( o , right ) ; }
Returns a Pattern that matches when both Observables emit an item.
<p>
<img width="640" src="https://raw.github.com/wiki/ReactiveX/RxJava/images/rx-operators/and_then_when.png" alt="">

@param right
an Observable to match with the source Observable
@return a Pattern object that matches when both Observables emit an item
@throws NullPointerException
if {@code right} is null
@see <a href="https://github.com/ReactiveX/RxJava/wiki/Combining-Observables#wiki-and-then-and-when">RxJava Wiki: and()</a>
@see <a href="http://msdn.microsoft.com/en-us/library/hh229153.aspx">MSDN: Observable.And</a>