File Extension Library

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.DEFS File Extension

  • Developer by: University of Kent
  • Category: Developer Files
  • Format: Text

What are .DEFS files and how to open them?

Can't open .DEFS file? Are you wondering what it contains? On our site we will explain to you what this file is, what it is used for and what software opens the .DEFS file.

What is a .DEFS file extension?

.DEFS file extension is created by University of Kent. .DEFS has been classified as Developer Files. The format of .DEFS file is Text.

.DEFS is BlueJ Settings File

Configuration file created for BlueJ, a Java development environment; contains administrator settings for the BlueJ program such as the desired language and location of libraries.

There are two ways to change BlueJ configuration settings:

  • To change user options, with the application open, select BlueJ from the menu bar, then Preferences.... You can alter settings in this dialog box.
  • To change administrator options, open the file located at: BLUEJ_HOME/lib/bluej.defs. If on a Mac, right-click the BlueJ application, select Show Package Contents, then Contents, then Resources, then Java. You should then see the bluej.defs file and other DEFS files.

    • Once you open a DEFS file, it will contain a list of properties in the following format: property-name = value

    The property name should never be changed but the values can be changed to alter the configuration.

    Common DEFS Filenames

    bluej.defs - The default settings file located in the BlueJ program.

    List of all softwares that can open the BlueJ Settings File
    Windows
    BlueJ
    Mac
    BlueJ
    Linux
    BlueJ

    How to fix problems with .DEFS files

    1. You need to update the application that you normally use to open .DEFS files. Only the latest version of the software supports the current .DEFS file format
    2. You need to check the .DEFS file for viruses. To do this, you need to scan it with a popular antivirus (Norton, Nod32, Kaspersky, Dr.Web, etc.)
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