get directory path linux

[gadarla]

hi all

please help me
i have one problem
while creating directory in linux

File dir = new File(System.getProperty("/home/usr1") +File.separatorChar + "jdb1");
dir.mkdirs();
in above /home/usr1 takes null
is there any way to acess folder path from application and create
directory under that

Thanking you

[swarna dasa]

Don't think this is a SCJP question.

Anyway here is the answer.

public static String getProperty(String key)

Gets the system property indicated by the specified key.

So System.getProperty(key), gets the value for the key, which in this case is null.

while running your java application
use -D option to set System properties
eg java -DAPPLICATION_HOME="/home/usr1" YourJavaFileName

Is your Application accessing the file (directory) resources on the same machine it is running on?
If yes, then you can create a directory
File dir = new File("/home/usr1" +File.separatorChar + "jdb1");
dir.mkdirs();

if not then the application has to send the file/dir path to the server via RMI and then the server will create the directory