CODEWITHSUNDEEP
javaswingjtree
itro
itro

Reputation: 7228

how to refresh content of JTree in java?

I have a JTree which shows content of specific directory. When a download some file with ftp to this directory i want to let my JTree know about it and refresh his contents. How can i refresh JTree after some file added or removed from directory which is root for JTree?

btnRefreshContents.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent e) {
            tree.getModel().
        }
    });

Upvotes: 0

Views: 1049

Answers (2)

tenorsax
tenorsax

Reputation: 21223

You could add directory listener to the underlying tree model. There are many solutions for that. As already stated above, WatchService in Java 7 can be useful. But since you are not yet at Java 7 you can try other approaches:

JNotify - java library that allows java application to listen to file system events. Here is a sample (make sure you add dll/so dependency to your path.)

VFS from Apache Commons. Commons VFS provides a single API for accessing various different file systems. DefaultFileMonitor is a good example.

Upvotes: 0

Greg Kopff
Greg Kopff

Reputation: 16555

If you're using Java 7, you can use the new WatchService (FileSystem.newWatchService()) to detect changes to the filesystem. Here's an article on it.

As to updating the JTree component, take a look at this Stack Overflow page.

Upvotes: 3

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