searching collections

 

■ For Sets use              myset.contains(Obj) 
                                    Returns boolean.

 

■ For Maps use            mymap.containsKey(Obj)                                                        

                                    mymap.containsValue(Obj)
                                    Both return boolean.

 

■ For Lists, use            mylist.indexOf(Obj)
                                    Returns index of found Object or –1 if not found.

 

■ For Vectors use        myvector.contains(Obj)  or 

                                    myvector.containsAll(coll)