____ divide a Web page into multiple HTML documents.
A. Tables
B. Grids
C. Frames
D. all of the above
Answer: C
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Create a personal budget. Put income in its own column, then total the values. Put expenses in another column, then total the values. The more accurate you are, the closer your budget will be.
What will be an ideal response?
How is a binary search tree balanced?
a. By using rotations to rearrange nodes to maintain the tree b. By using a secondary hash function c. By sorting the nodes of the tree d. By avoiding duplicate elements
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".
Explain what loose coupling means.
What will be an ideal response?