Go Premium for a chance to win a PS4. Enter to Win

x
?
Solved

renaming an existing file

Posted on 1997-10-31
2
Medium Priority
?
533 Views
Last Modified: 2010-05-18
How do you rename an existing file on a local drive? In my application, I save a new file to a temporary name, and then rename it to the real name after I finish writing data to disk. In the method doSave(), I pass a File object that I create based on information the user specifies in a FileDialog. Note that theFile doesn't exist yet, it simply describes the file's pathname:



private boolean doSave(File theFile)

{

// create a unique file name for the temp file

String tempName = "_" + String.valueOf(System.currentTimeMillis());

File tempFile = new File(theFile.getParent(), tempName);



// create a RandomAccessFile object and pass to application's method

RandomAccessFile aRaf = new RandomAccessFile(tempFile, "rw");

myApp.writeData(aRaf);

// data is safely written to hard disk, so now rename temp file to real file name I want

boolean savedOK = (tempFile.renameTo(theFile));

return savedOK;

}



The method always returns false. The data is written to disk correctly, but the call to renameTo never works, and the file still has the temporary name.
0
Comment
Question by:dacton
2 Comments
 
LVL 4

Accepted Solution

by:
russgold earned 800 total points
ID: 1229705
You cannot rename a file while it is open.  

Add the line:

aRAF. close();

before:

tempFile. rename( theFile );
0
 

Author Comment

by:dacton
ID: 1229706
Yikes! I should have figured that one out. I added the close() call it it all works now. Thanks for the quick response.
0

Featured Post

Concerto Cloud for Software Providers & ISVs

Can Concerto Cloud Services help you focus on evolving your application offerings, while delivering the best cloud experience to your customers? From DevOps to revenue models and customer support, the answer is yes!

Learn how Concerto can help you.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

After being asked a question last year, I went into one of my moods where I did some research and code just for the fun and learning of it all.  Subsequently, from this journey, I put together this article on "Range Searching Using Visual Basic.NET …
Introduction This article is the second of three articles that explain why and how the Experts Exchange QA Team does test automation for our web site. This article covers the basic installation and configuration of the test automation tools used by…
Viewers will learn about basic arrays, how to declare them, and how to use them. Introduction and definition: Declare an array and cover the syntax of declaring them: Initialize every index in the created array: Example/Features of a basic arr…
The viewer will learn how to implement Singleton Design Pattern in Java.
Suggested Courses

971 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question