A control that is used to display data on the main form on different pages, similar to the way database objects, such as forms and tables, display on different tabs
a. Tab control
b. Multi-page form
c. Subform
A
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(Modified Class Average Application) The Class Average application has a deficiency. The Average JButton is never disabled after the average is calculated the first time. Modify the Class Average application, so that the Get Grades JButton is disabled after the user enters 10 grades. The user’s only option then will be to click the Average JButton to display the average. Once the average is displayed, have the application disable the Average JButton, enable the Get Grades JButton and give the Get Grades JButton the application’s focus, so that the user may enter 10 new grades. See figure 9.23 below:
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a) Copying the template to your working directory. Copy the directory C:Examples Tutorial09ExercisesModifiedClassAverage to your C:SimplyJava directory.
b) Opening the template file. Open the ClassAverage.java file in your text editor.
c) Modifying the getGradesJButtonActionPerformed event handler. Add code in lines 139–140 to disable the Get Grades JButton. Use line 139 for a comment, and line 140 to perform the disabling.
d) Modifying the averageJButtonActionPerformed event handler. Add code starting in line 150 that will disable the Average JButton, enable the Get Grades JButton and give the application’s focus to the Get Grades JButton.
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:SimplyJavaModified- ClassAverage.
g) Compiling the
The iOS platform, the Android platform, and the Windows platform are three of the most popular operating system environments
Indicate whether the statement is true or false
The
tag is used to indicate ____.
A. the text should be brown B. the ideal browser version C. a manual line break D. the text should be brightened
The absence of a dot in a pin, in conjunction with the solid wire, identifies the tag as a(n) ____________________.
Fill in the blank(s) with the appropriate word(s).