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(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. Write an interface ICarbonFootprint with aGetCarbonFootprint 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 inList, then iterates through the List, polymorphically invoking each object's GetCarbonFootprint method.
You must design, code and demonstrate a J2ME program (a program capable of running on mobile telephones) according to the specification given in the next section. The overall cour
What is the output of the following JavaScript code? name="Ali Akbar"; document.write(name.charAt(4)) ;
How many JSP scripting elements and what are they? Ans) Three scripting language elements are there: a) declarations, b) scriptlets, c) expressions.
Objectives _ Creating and compiling a simple program _ Designing classes _ Use of recursive algorithms _ Learn basic combinatorics Task: string permutation Writ
Describe what is bytecode? It is an instruction set. It extends with class. 'javac' compiler translates the .java file into .class. JVM interprets bytecode.
Task 1 Create a new project in Eclipse called Assignment 1. Within this project create a package called task01. 1/ Download the class Date (you must use this class - no
Spring is an open source framework created to address the difficulty of enterprise application development. One of the chief benefits of the Spring framework is its layered archite
Errors: When a dynamic linking failure or some other "hard" failure in the virtual machine happens, the virtual machine gives an Error. Typical Java programs could not find Error
consider the file name cars.text each line in the file contains information about a car ( year,company,manufacture,model name,type) 1-read the file 2-add each car which is represen
What is an Exceptions ? • What is an exception? • try-catch • finally • The different kinds of exceptions • Multiple catch clauses • The throws clause • Throwing excepti
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