Make a difference (carbonfootprint interface: polymorphism) using interfaces, as you learned in this chapter, you can specify similar behaviors for possibly disparate classes. governments and companies worldwide are becoming increasingly concerned with carbon footprints (annual releases of carbon dioxide into the atmosphere)from buildings burning various types of fuels for heat, vehicles burning fuels for power, and the like. many scientists blame these greenhouse gases for the phenomenon called global warming. create three small classes unrelated by inheritance -classes building, car and bicycle. give each class some unique appropriate attributes and behaviors that it does not have in common with other classes. write an interface carbonfootprint with a getcarbonfootprint method. have each of your classes implement that interface, so that its getcarbonfootprint method calculates an appropriate carbon footprint for that class ( check out a few websites that explain how to calculate carbon footprints). write an application that creates objects of each of the three classes, places references to those objects in arraylist , then iterates through the array-list, polymorphically invoking each object's getcarbonfootprint method.

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Evidenceinformation gathered from credible research sources that a speaker support his or her claims.encyclopediaa reference work that offers relatively brief entries providing background information on a wide range of alphabetized topics.peer reviewthe act of subjecting articles submitted to a scholarly journal to critical readings by other experts in a particular field.dictionarya reference work that offers definitions, pronunciation guides, and sometimes etymologies for wordsquotation booka reference work offering famous or notable quotations on a variety of subjectswhat advantages do libraries offer over the internet? libraries allow you access to strong evidence and credible sources that are not available on web sites.describe the advantages and disadvantages of internet research.advantages: allows you convenient access to information on nearly any topic & offers speed-- enabling you to track down a news report or a research finding almost instantly from anywhere in the world. and puts an immense volume of information at our fingertipsdisadvantages: books may not be available online from credible sources, may cost money. cannot assume that information online is credible. anyone can create a website or blog about a topic! what four key characteristics determine a source's credibility? capacityrecency

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