Java declaration of global string variables

Question

I am writing a server program and a client program. I named the server code file server.java. The client runs from a different machine. One of the things the client can do is upload files to the server. I want the server to store the uploaded files in a folder which resides in the same directory as the server.java program file. So I used the following code:

String server_files_location = getClass().getProtectionDomain().getCodeSource().getLocation().getPath();

This did work. However I have to declare this variable separately in all the different classes I am writing. I want to make this a global string variable so that I dont have to declare this every time I add a new class or method.

So at the beginning of the program I tried:

public static String server_files_location = getClass().getProtectionDomain().getCodeSource().getLocation().getPath();

This gives me an error saying Cannot make a static reference to the non-static method getClass() from the type Object.

How else can I get this variable to be accessible globally?

rgettman · Accepted Answer · 2014-02-20 19:05:27Z

3

Use a class literal from the class you're declaring the variable in.

public static String server_files_location =
    YourClass.class.getProtectionDomain().getCodeSource().getLocation().getPath();

Consider making the variable final if it's a constant and won't ever change. Additionally, the normal Java variable naming convention would say to name the variable in camel case, e.g. serverFilesLocation, or if it's a constant, in ALL CAPS, e.g. SERVER_FILES_LOCATION.

answered Feb 20, 2014 at 19:05

rgettman

179k30 gold badges282 silver badges365 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

1xQ Over a year ago

How would you declare DataInputStream or DataOutputStreamor BufferedReader globally?

La-comadreja · Accepted Answer · 2014-02-20 19:03:07Z

0

delete static in your declaration of the variable. All the instances will be able to access one instance's copy of it if both the variable and the instance in question are public.

answered Feb 20, 2014 at 19:03

La-comadreja

5,74512 gold badges38 silver badges64 bronze badges

Collectives™ on Stack Overflow

Java declaration of global string variables

2 Answers 2

1 Comment

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

1 Comment

Comments

Your Answer

Sign up or log in

Post as a guest

Related