How long is a DES key?
A. 40
B. 56
C. 64
D. 112
B. 56
You might also like to view...
Enhance the Inventory application that you developed in Tutorial 4 to prevent the user from entering input that is not a number. Use keyboard events to allow the user to press the number keys (0 to 9), the left and right arrow keys, the Backspace key and the Enter key. If any other key is pressed, display a JOption- Pane instructing the user to enter a number (Fig. 22.32).
a) Copying the template to your working directory. Copy the C:Examples Tutorial22ExercisesInventoryEnhanced directory to your C:SimplyJava directory.
b) Opening the template file. Open the Inventory.java file in your text editor.
c) Adding a switch statement. In line 132 (in the cartonsJTextFieldKeyPressed method), begin a switch statement that determines whether a number key, a left or right arrow key or the Backspace key was pressed. Use KeyEvent constants VK_0, VK_1, VK_2, VK_3, VK_4, VK_5, VK_6, VK_7, VK_8, VK_9, VK_LEFT, VK_RIGHT, VK_BACK_SPACE and VK_ENTER. If one of these keys was pressed, use the break state- ment to continue execution.
d) Adding the default statement. At the end of the switch statement, add a default case to determine whether a key other than a valid one for this application was pressed. If an invalid key was pressed, display a JOptionPane that instructs the user to enter a number. Also, reset the text of cartonsJTextField to "0".
What does the Clear Style Overrides button do in the Graphic Styles panel?
What will be an ideal response?
Click the ____ button in the Animation Options group to open the Custom Animation window.
A. Animated Disclosure B. Animate Slides C. Custom Animation D. Reorder
The area covered by one or more interconnected wireless access points is commonly called a(n) _____.
A. reception area B. hot spot C. coverage zone D. access area