[+Haze]

Okay so I'm currently creating a game and I've having a problem with the save feature. Currently I use WindowsOS and the Windows side of the code works a treat, but since I don't have other OS systems like mac or linux I don't know if this code would work on all platforms (the major ones)

Here the code.

Spoiler (Click to View)

Code

private Path getSavePath() {

      try {

      String OS = System.getProperty("os.name").toLowerCase();
      Path fullDirectory = null;
      Path fullPath = null;

      if (OS.contains("win")) {

            fullDirectory = Paths.get(System.getenv("AppData") + "\\NoughtPlusPlus");
            fullPath = Paths.get(fullDirectory.toString() + "\\RecentScores.npp");

      } else {

            fullDirectory = Paths.get(System.getProperty("user.home") + "\\Library\\Application Support\\NoughtPlusPlus");
            fullPath = Paths.get(fullDirectory.toString() + "\\Library\\Application Support\\RecentScores.npp");
      }

      if (Files.notExists(fullDirectory))
            Files.createDirectory(fullDirectory);

      return fullPath;

      } catch (IOException e) {

      AlertBox.show("Error trying to read saved game data - Press okay to see error");
      AlertBox.show(e.getMessage());

      return null;
      }
    }

So, what do people suggest or what is the right way for obtaining like an AppData folder for other platforms like Mac and Linux?

I would also appreciate replies from Mac & Linux users too

Thanks

[JavaProfit]

For mac use ~/Library/Application Support
... Not sure what people usually use for most distros of Linux, but somewhere in the home folder works.

ninja: I don't think you can use backslashes for anything other than dos. File.separator or just "/" works.

[+Haze]

So, for a mac and linux user.

Will

Code

fullDirectory = Paths.get(System.getProperty("user.home") + "\\Library\\Application Support\\NoughtPlusPlus");
      fullPath = Paths.get(fullDirectory.toString() + "\\Library\\Application Support\\RecentScores.npp");

Work?

Also, seems you're right about the backslash thing, thanks :D

[JershDervis]

I know the Minecraft Launcher uses the following method:

Code

public static final String APPLICATION_NAME = "minecraft";

    public enum OS
    {
      WINDOWS,  MACOS,  SOLARIS,  LINUX,  UNKNOWN;
    }

    public static OS getPlatform()
    {
      String osName = System.getProperty("os.name").toLowerCase();
      if (osName.contains("win")) {
      return OS.WINDOWS;
      }
      if (osName.contains("mac")) {
      return OS.MACOS;
      }
      if (osName.contains("linux")) {
      return OS.LINUX;
      }
      if (osName.contains("unix")) {
      return OS.LINUX;
      }
      return OS.UNKNOWN;
    }

    public static File getWorkingDirectory()
    {
      String userHome = System.getProperty("user.home", ".");
      File workingDirectory;
      switch (getPlatform().ordinal())
      {
      case 1:
      case 2:
            workingDirectory = new File(userHome, "." + APPLICATION_NAME + "/");
            break;
      case 3:
            String applicationData = System.getenv("APPDATA");
            String folder = applicationData != null ? applicationData : userHome;

            workingDirectory = new File(folder, "." + APPLICATION_NAME + "/");
            break;
      case 4:
            workingDirectory = new File(userHome, "Library/Application Support/" + APPLICATION_NAME);
            break;
      default:
            workingDirectory = new File(userHome, APPLICATION_NAME + "/");
      }
      return workingDirectory;
    }

[JavaProfit]

I know the Minecraft Launcher uses the following method:

Code

public static final String APPLICATION_NAME = "minecraft";

    public enum OS
    {
      WINDOWS,  MACOS,  SOLARIS,  LINUX,  UNKNOWN;
    }

    public static OS getPlatform()
    {
      String osName = System.getProperty("os.name").toLowerCase();
      if (osName.contains("win")) {
      return OS.WINDOWS;
      }
      if (osName.contains("mac")) {
      return OS.MACOS;
      }
      if (osName.contains("linux")) {
      return OS.LINUX;
      }
      if (osName.contains("unix")) {
      return OS.LINUX;
      }
      return OS.UNKNOWN;
    }

    public static File getWorkingDirectory()
    {
      String userHome = System.getProperty("user.home", ".");
      File workingDirectory;
      switch (getPlatform().ordinal())
      {
      case 1:
      case 2:
      workingDirectory = new File(userHome, "." + APPLICATION_NAME + "/");
      break;
      case 3:
      String applicationData = System.getenv("APPDATA");
      String folder = applicationData != null ? applicationData : userHome;

      workingDirectory = new File(folder, "." + APPLICATION_NAME + "/");
      break;
      case 4:
      workingDirectory = new File(userHome, "Library/Application Support/" + APPLICATION_NAME);
      break;
      default:
      workingDirectory = new File(userHome, APPLICATION_NAME + "/");
      }
      return workingDirectory;
    }

That's decompiled from the launcher, right? I'm just assuming that because enum switches use ordinal() after being compiled and no one writes enum switches with ordinal

[DragonBook]

If you truly want it to be multi-platform, save yourself the trouble and 1) allow the user to choose their own directory and 2) store all save profiles and settings files in a sub-directory. Don't worry about how Mojang does it. You can always make it more sophisticated later.

[+Haze]

If you truly want it to be multi-platform, save yourself the trouble and 1) allow the user to choose their own directory and 2) store all save profiles and settings files in a sub-directory. Don't worry about how Mojang does it. You can always make it more sophisticated later.

What sub directory should I save it to?