— Scott McNealy, Sun Microsystems Chairman, President and ceo

participant sends one to the server.
Serializing a pattern
Saving a BeatBox pattern
public class MySendListener implements ActionListener {
public void actionPerformed(ActionEvent a) {
boolean[] checkboxState = new boolean[256];
for (int i = 0; i < 256; i++) {
JCheckBox check = (JCheckBox) checkboxList.get(i);
if (check.isSelected()) {
checkboxState[i] = true;
}
}
try {
FileOutputStream fileStream = new FileOutputStream(new File(“Checkbox.ser”));
ObjectOutputStream os = new ObjectOutputStream(fileStream);
os.writeObject(checkboxState);
} catch(Exception ex) {
ex.printStackTrace();
}
} 
// close method
} 
// close inner class
It all happens when the user clicks the 
button and the ActionEvent fires.
This is an inner class inside 
the BeatBox code.
Make a boolean array to hold the 
state of each checkbox.
Walk through the checkboxList 
(ArrayList of checkboxes), and 
get the state of each one, and 
add it to the boolean array.
This part’s a piece of cake. Just 
write/serialize the one boolean array!

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464
 
chapter 14
This is pretty much the save in reverse... read the boolean array and use it 
to restore the state of the GUI checkboxes. It all happens when the user hits 
the “restore” ‘button.
Restoring a pattern
Restoring a BeatBox pattern
public class MyReadInListener implements ActionListener {
public void actionPerformed(ActionEvent a) {
boolean[] checkboxState = null;
try {
FileInputStream fileIn = new FileInputStream(new File(“Checkbox.ser”));