In NetBeans, open the
BoardGameTester
project.
2. Create a new package named
games.utilities.
3. Add a public class named
FileManager
that contains the
following methods:
public static void writeToFile(String saveState, String
fileName) {
//TODO: Write a string to a new file synchronously
}
public static void writeToFileAsync(final String saveState,
final String fileName) {
//TODO: Write a string to a new file asynchronously
}
Graded Project
Graded Project
Programming in Java
166
4. Implement the
writeToFile
method using the new file
I/O classes in a
try
-with-resources statement.
Note:
Use the code in Activity 15 as a guide for the
writeToFile
method. Remember to import the java.io,
java.nio,
java.nio.charset,
and
java.nio.file
packages.
5. Implement the
writeToFileAsync
method using a sepa-
rate thread. Use the following code as a guide:
new Thread() {
public void run() {
writeToFile(saveState, fileName);
}
}.start();
Note:
This code uses an anonymous inner class to declare
and instantiate a
Thread
class. Unlike a traditional inner
class, anonymous inner classes are available only within
the statement they’re declared. You’ll see more examples
of anonymous classes with Swing in the next lesson. To
ensure that local variables are unchanged by the inner
class, the parameters
saveState
and
fileName
must be
declared with the
final
keyword.
6. In the
main()
method of the
BoardGameTester
project,
add the following code:
Note:
Remember to import the
games.utilities
package!
FileManager.writeToFileAsync(ticTacToe.toString(), “ttt.txt”);
FileManager.writeToFileAsync(connectFour.toString(), “c4.txt”);
FileManager.writeToFileAsync(mastermind.toString(), “mm.txt”);

7. Compile and run the project to create three files, one for
each saved board game. Open the files to ensure they
contain the correct game board display.
Note:
Notepad won’t display the line returns in the file.
You may need to open the text files using Microsoft Word
or Wordpad instead.
These three game board files will be required for submission.