Several techniques have been proposed for the distribution of public keys. The proposals can be grouped into the following four general schemes: public announcement, publicly available directory, public-key certificates, and ____________.
Fill in the blank(s) with the appropriate word(s).
public-key authority
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(Calculator GUI) Many components have the same kinds of properties as JLabels. For instance, JButtons also have size, location and text properties. In this exercise, you will cus- tomize the plus (+) JButton in the Calculator GUI shown in Fig. 2.35.
a) Copying the template to your working directory. Copy the C:Examples Tutorial02ExercisesCalculator directory to your C:SimplyJava directory.
b) Opening the Command Prompt window and changing directories. Open the Command Prompt by selecting Start > Programs > Accessories > Command Prompt. Change to your working directory by typing cd C:SimplyJavaCalculator, then pressing Enter.
c) Compiling the template application. Compile your application by typing the command javac Calculator.java, then pressing Enter.
d) Running the template application. Run the application by typing java Calculator.
The GUI of the Calculator template application should appear as shown in Fig. 2.36. Notice that the plus (+) JButton is missing. The template application creates the plus (+) JButton, but the JButton’s default width and height are both zero, so it does not appear on the screen. You will customize the plus (+) JButton’s text and bounds properties to make it appear as in Fig. 2.35.
 or false (F)
FIGURE 3-1
Figure 3-1, shown above, is an example of an HTML ____.
A. grid B. spreadsheet C. table D. chart
Critical Thinking Questions Case 8-2 ? In your role as production manager, you want to make sure that all of the artwork in a new publication is okay to use. You have a checklist with all of the images that were taken from external sources (as opposed to having been created by the design team). ? Which of the following is NOT likely to be true about an editorial-rights image you are using in the publication? a.It can be used with written permission for news purposes with appropriate citation.c.It is appropriate for personal use, educational purposes, and one-time use on a website.b.It may be copyrighted.d.It is less expensive than rights-protected images.
What will be an ideal response?