Java 6 Illuminated: An Active Learning Approach, 2nd Edition

892 CHAPTER 12 Graphical User Interfaces

button that was clicked. We then set the text of that button to its board

position (line 69), using the corresponding element in the two-dimen-

sional array names. Having found the source of the event, we then exit the

event handler via the return statement (line 70) to interrupt the for loops,

and thus to avoid unnecessary processing.

Figure 12.18 shows the example running. When you run this program, click

on various squares; resize the window, and check that the layout manager

maintains an 8-by-8 grid.

Layout managers can be set dynamically, based on user input. For example,

the user could enter the number of ...