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When you run the program, a JOptionPane.showConfirmDialog method call displays this:
Clicking Yes causes a call to JFileChooser’s showOpenDialog method to display another window, and after you select filePgms, it looks like this:
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Clicking Open causes a call to JOptionPane’s showMessageDialog method to display this:
And clicking OK terminates the program.
Figure 15.15 Sample session for the FileSizesGUI program
