Java 1.6和Desktop.open()的问题

import java.awt.Desktop;
import java.io.File;
import java.io.IOException;

public class OpenFileExample {
    public static void main(String[] args) {
        File file = new File("example.txt");
        Desktop desktop = Desktop.isDesktopSupported() ? Desktop.getDesktop() : null;
        if (desktop != null && desktop.isSupported(Desktop.Action.OPEN)) {
            try {
                desktop.open(file);
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
}