Monitor file system events under multiple platforms in your Java app.

Why JxFileWatcher

  • Rich and easy-to-use API.
  • Great documentation with many examples.
  • Great support. Responsive support team will answer your request within 24 hours. To get help you can choose different support channels: email, support site and forum or premium support service. You are welcome to contact us with initial questions at evaluation support address.


Observing Basic File Operations

Watch for creation, renaming or removal of files and subfolders within any specified folder.

Support for Different File Systems

JxFileWatcher supports different file system types and always uses the best algorithm for monitoring file system events in a specified watching directory.

File Access Monitoring

You will be able to receive notifications about events when access or modification date is changed.

Limit Watching Scope

You can watch for all file events or just for specified by the event and file filters. The files can be watched inside the selected folder only or including all its subfolders.

Watch Properties Change

Be notified about any changes to file size and attributes. These are System, Hidden, Read only and Archived attributes for Windows platforms, and Read, Write and Execute attributes for Linux and Mac systems.

Try the Demo

Run The Demo jxfilewatcherdemo.jnlp

Runs on Windows, Mac OS X & Linux with:

Examples of Apps Our Customers Build

Java applications which need to monitor folders. For example, a media management application that should be notified when user adds a new media file to a watched folder.

Licensing and Pricing*

By using our products or any related documentation, you accept the Terms and Conditions of the Product Licence Agreement.

What You Get

  • Perpetual Development Licence
  • Free runtime distribution
  • Free minor version product updates
  • Free major version upgrade within 60 days of purchase date
  • Free technical support pack
  • No obligatory renewal fee
  • 15% discount on other TeamDev products

Per Developer


Per Project




Source Code


Support Renewal


Premium Support

* Your country's tax fees may apply to licence purchases. They will be charged in addition to the prices specified.
* Prices are subject to change without prior notice from TeamDev. Request an official quote for the purpose of purchase processing.

Technical FAQ

A: Yes, you can use it if you include jxfilewatcher-1.4.partial.jar to application classpath instead of jxfilewatcher-1.4.jar.

A: No, JxFileWatcher does not use this approach. It always uses file system notifications to detect the changes.

A: JxFileWatcher reports all file system events to its listeners and number of events greatly depends on the file watcher settings and a watched folder.

A: The fully-qualified name for a class is the package name followed by the class name, separated by a period (.). For example: com.mycompany.myproduct.MyClass

A: This can be any class of your application. The only requirement is that it should be included into your Java application class path.

Licensing FAQ

A: Our licensing is based on versions of JxFileWatcher. Having purchased the licence for our product you get the right to use the current major version of the product.

A: All minor version updates are free of charge. For example, if you have a licence to library version 1.x, you can receive all updates until the version 2.x is released. You can check the version of your licence in the jxfilewatcher.lic file.

A: Upon purchase of licence you will receive a licence archive. The archive will contain two JARs: development.jar and runtime.jar. Development.jar is the licence that should be used in development process. Runtime.jar should be used to distribute your application to end users. Inside the development.jar you can find the jxfilewatcher.lic file that contains information about your licence.

A: Major version upgrades should be purchased. You can upgrade your licence to a major version with a 25% upgrade discount. The licence upgrade includes renewal of the Standard Support pack.

A: You can distribute unlimited number of copies of your product with our library enclosed. Please use Runtime Licence for distribution of your product.

A: Runtime Licence is provided free of charge.

A: Yes, you can purchase JxFileWatcher Source Code Licence; it is provided on a per developer basis. Please contact our sales team if you are interested in this option.

A: You may want to purchase a Project licence, which is more cost-effective in case there are 3 and more developers on the team.

A: Per Project licence is bound to a single project you do, but it allows any number of developers in your company to work with our library.

A: When we say “project” we have in mind one product of your company including your future product versions or potential derivative works based on your product.

A: The best solution would be to purchase the Unlimited licence, which covers any number developers and projects in one company.

A: No. The Project licence is tied to one project only.

A: Yes, our licences are tied to a company, not to a specific developer. You can transfer licences to other developers provided that the number of developers, working on your team equals the number of licences purchased.

Free Licenсes Programs

Free Licences for Academic Purposes

We provide licences for institutions, educators, students and researchers for the duration of the project or a study.

Apply You will need to submit a reference letter from your supervisor (for students) or proof of participation in research project.
Open Source™

Free Licences for Open-source Projects

We will provide you with a free licence that will be tied to a class name in your project.


Getting Help

Product Forums

You will need a Google ID to be able to post on forums, and you can do that

Note that your message will be automatically posted on the web.

Evaluation Support

Standard Support

Premium Support

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