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Appendix H: Procedural Code in Java The FOREACH clause introduces acc as a reference to one of the Account objects in the collection theAccounts. Within the FOREACH loop we use acc to represent the next Account object we are processing. We can also use a variant of the FOREACH […]

Appendix H: Procedural Code in Java WHILE selection is not choice number 0 DO IF selection is choice number 1 THEN provide service for choice number 1 ELSE IF selection is choice number 2 THEN provide service for choice number 2 ELSE IF … THEN … […]

Object-Oriented Design with UML and Java Observe how program code is totally absent. This is intentional, we simply wish to convey the actions required in getting some input from the user. If we then subsequently add some detail, then the following Java emerges: ConsoleIO.out.print( Please enter date as DD […]

Appendix H Procedural Code in Java Appendix D is primarily concerned with the mappings from the elements of a class diagram to Java classes. They were simply concerned with the major constructs including interfaces, classes, relations, class attributes and methods. In this appendix we examine the […]

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Appendix G: Object-Oriented Programming with Java 6. How is a redefined method introduced into a Java subclass? 7. The Java keyword abstract has two uses. Give examples of each and explain their usage. 8. Answer the following, giving explanations. (a) Can an interface extend another interface? […]

Object-Oriented Design with UML and Java public Rectangle(double upperLeftX, double upperLeftY, double width, double height) { this(new Point(upperLeftX, upperLeftY), width, height); } public double getPerimeter() { return 2 * (theWidth + theHeight); } public double getArea() { return theWidth * theHeight; […]

Appendix G: Object-Oriented Programming with Java Java supports multiple inheritance through interfaces. A class can be an extension of at most one abstract class or concrete class and implement any number of interfaces. The isA relation is still present, but now an instance of the subclass can be substituted for […]

Object-Oriented Design with UML and Java co.hire(e1, m3); co.hire(e2, m3); co.printEmployeeDetails(); } } The UML collaboration diagram of figure G.5 shows the configuration of objects and the message flows between them. The application, represented by the actor, sends the message printEmployeeDetails to the Company object […]

Appendix G: Object-Oriented Programming with Java public void hire(SalesEmployee sales, SalesManager man) { Iterator iter = theEmployees.iterator(); while(iter.hasNext() == true) { Employee emp = (Employee)iter.next(); if(emp instanceof SalesManager && emp == man) { SalesManager manager = (SalesManager)emp; manager.addSalesMember(sales); } } […]