File handling in blackberry

I am reusing some android code into my blackberry application. There is one line of code like this

File f = new File(cacheDir, filename); 

where cacheDir is a File & filename is a string. But when implementing this same line in blackberry i get error

"The constructor File(File, String) is undefined".

Can anyone help me out.

UPDATE

Another error which i am facing is for this line

OutputStream os = new FileOutputStream(f);

where f is the instance of FileConenction stream. The error says

"The开发者_开发技巧 constructor FileOutputStream(FileConnection) is undefined"

can anyone help?

Usual File Java API does not work on BB.

See BB API documentation for javax.microedition.io.Connector and javax.microedition.io.file.FileConnection.

You will need to do something like:

FileConnection fconn = (FileConnection) Connector.open("file:///CFCard/newfile.txt");

// If no exception is thrown, then the URI is valid, but the file may or may not exist.
if (!fconn.exists()) fconn.create(); // create the file if it doesn't exist

OutputStream os = fconn.openOutputStream();

...

fconn.close();

You have to use

Connector.open("file://" + dirName);

More info available here

You can try this:

OutputConnection connection = (OutputConnection)                     
    Connector.open("file://c:/myfile.txt;append=true", Connector.WRITE );
OutputStream out = connection.openOutputStream();
PrintStream output = new PrintStream( out );

output.println( "This is a test." );

out.close();
connection.close();

Taken from here