Sams Teach Yourself Java™ in 24 Hours (Covering Java 7 and Android)

ptg7068951

Workshop 311

2. What method reads all the elements that are enclosed within a parent
   element?
   A. get()
   B. getChildElements()
   C. getFirstChildElement()


3. What method of the Elementsclass can be used to determine the num-
   ber of elements that it contains?
   A. count()
   B. length()
   C. size()

Answers

1. C.Well-formed data has properly structured start and end tags,a single
   root element containing all child elements,and an ?XMLdeclaration at
   the top. Valid data follows the rules of a particular XML dialect. “Dy-no-
   mite!” is the catchphrase of the comedian Jimmie “J.J.” Walker.


2. B.ThegetChildElements()method returns an Elementsobject holding
   all the elements.


3. C.Just like vectors,Elementsuses a size()method that provides a
   count of the items it holds.

Activities

Toextend your knowledge of XML,parse the following activities:

. Revise the WeatherStationapplication to display an additional element
from the Weather Underground forecast data.
. Write a program that displays the data contained in shortChanges.xml,
an XML document of weblog information available at
http://www.weblogs.com/shortChanges.xml.

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