Which of these is used to depict a relationship in an entity relationship diagram?
A) triangle
B) square
C) crow's foot line
D) rectangle
C) crow's foot line
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Which application would be the best choice for creating a budget?
a. Database b. Personal information manager c. Spreadsheet d. Word processor
Create an application that allows the user to inventory DVDs. Users input the title of the DVD and bonus materials and that information is stored in an object. The GUI is provided for you (Fig. 18.43). You will create a class (DVDInfo) to represent the DVD object and another class (BonusInfo) to represent bonus materials for a DVD object such as the movie’s trailer.
a) Copying the template to your working directory. Copy the C:Examples Tutorial18ExercisesDVDInventory directory to your C:SimplyJava directory.
b) Opening the Command Prompt window and changing directories. Open the Com- mand Prompt window by selecting Start > Programs > Accessories > Command Prompt. Change to your working directory by typing cd C:SimplyJavaDVD- Inventory.
c) Opening the template files. Open the DVDInventory.java, DVDInfo.java and
BonusInfo.java files in your text editor.
d) Creating the BonusInfo class. View the BonusInfo class. Add code to this class so that its objects will each represent one bonus material item on the DVD. Each BonusInfo object should have a name (name) and a length (itemLength). Use this tutorial’s CookingTime class as your guide in creating the get and set methods for the name and length of each bonus material. Have your set methods truncate a name
longer than twenty characters and set the minutes of a
(Removing the continue Statement) Describe in general how you’d remove any continue statement from a loop in a program and replace it with some structured equivalent. Use the tech- nique you developed here to remove the continue statement from the program of 4.12.
What will be an ideal response?
Match the following terms to their meanings:
I. Data A. Facts that have been organized in a useful manner II. Record B. Row of related data about an entity III. Field C. A collection of related data about a particular topic or purpose IV. Information D. Details about people, events, things, or ideas V. Database E. A category of data in a column