a. Create a game that helps new mouse users improve their hand-eye coordination. Within...

a. Create a game that helps new mouse users improve their hand-eye coordination. Within a JFrame, display an array of 48 JPanels in a GridLayout using eight rows and six columns. Randomly display an X on one of the panels. When the user clicks the correct panel (the one displaying the X), remove the X and display it on a different panel. After the user has successfully “hit” the correct panel 10 times, display a congratulatory message that includes the user’s percentage (hits divided by clicks). Save the file as JCatchTheMouse.java.

b. Review how to use the GregorianCalendar class from Chapter 4, and then revise the JCatchTheMouse game to conclude by displaying the number of seconds it took the user to click all 10 Xs. When the application starts, create a GregorianCalendar object and use the get(Calendar.SECOND) and get(Calendar.MINUTE) methods with it to get the SECOND and MINUTE values at the start of the game. When the user has clicked all 10 Xs, create a second GregorianCalendar object and get the SECOND and MINUTE values at the end of the game. If the user starts and ends a game during the same minute, then the playing time is simply the difference between the two SECOND values. Make sure your application times the game correctly even if the start and stop times do not occur during the same MINUTE. Save the file as JCatchTheMouseTimed.java.

c. In the JCatchTheMouseTimed game described in Game Zone exercise 2b, the timer does not work correctly if the user happens to play when the hour, day, or year changes. Visit the Java Web site to find out how to use the GregorianCalendar class method getTimeInMillis(), and then modify the game to measure playing time accurately, no matter when the user plays the game. Save the file as JCatchTheMouseTimed2.java.