A Windows promois a set of desktop backgrounds, colors, sounds, and screen savers.
Answer the following statement true (T) or false (F)
False
A Windows theme is a set of desktop backgrounds, colors, sounds, and screen savers. To change the appearance of a desktop, right-click a blank area of the desktop to open the desktop shortcut menu, and then click Personalize to open the PERSONALIZATION screen in the Settings window. See 7-1: Using the Windows 10 Desktop
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Which of the following statements is false?
a. For each animation frame, FuncAnimation calls a function that you define to specify how to change the plot. b. Displaying animation frames to the screen is relatively fast compared to the die rolls, which occur at the computer’s CPU speeds. c If we roll only one die per animation frame, we won’t be able to run a large number of rolls in a reasonable amount of time. You can increase the execution speed of the simulation by rolling the die more times per animation frame. d. All of the above statements are true.
Create a JavaFX application that uses a TextField to get a message and encode or decode it using the classes described in the previous programming project. Use four buttons to control the kind of cipher used and to specify whether to encode or decode the message. Also, use a TextField to get the number used in the constructor for the ciphers.
In this project, we create an application that will encode and decode messages. It is relatively straightforward using the classes from the previous project. To do this, we will want variables of MessageEncoder and MessageDecoder interface types. When the cipher button is pressed, create a new cipher instance of the appropriate type and assign it to the variables.
Consider the relation CLASS(Course#, Univ_Section#, InstructorName, Semester, BuildingCode, Room#, TimePeriod, Weekdays, CreditHours). This represents classes taught in a university with unique Univ_Section#. Give what you think should be various candidate keys and write in your own words under what constraints each candidate key would be valid.
What will be an ideal response?
Enhance the Interest Calculator application you built in this tutorial with error checking. Test whether the user has entered valid values for the principal and interest rate. If the user enters an invalid value, dis- play a message in a message dialog. Figure 10.30 demonstrates the application handling invalid input.
a) Copying the template to your working directory. Copy the C:Exam- plesTutorial10ExercisesInterestCalculatorEnhanced directory to your C:SimplyJava directory.
b) Opening the template file. Open the InterestCalculator.java file in your text editor.
c) Customizing the calculateJButtonActionPerformed method to handle invalid input. In line 143, enter a condition into the if statement that returns true when the principal or rate are negative, or when the rate is over 10.
d) Displaying the error message. In lines 145–147, display the message dialog shown in
Fig. 10.30. Use three lines for clarity.
e) Saving the application. Save your modified source code file.
f) 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:SimplyJavaInterest- CalculatorEnhanced.
g) Compiling the application. Compile your