Please be aware that there is mistake in this page:

http://download.oracle.com/javase/tutorial/essential/io/file.html

In this code:

Path file = ...;
try {
    file.createFile(); //Create the empty file with default permissions, etc.
} catch (FileAlreadyExists x) {
    System.err.format("file named %s already exists%n", file);
} catch (IOException x) {
    //Some other sort of failure, such as permissions.
    System.err.format("createFile error: %s%n", x);
}

There is no exception by the name "FileAlreadyExists"