Checking out and opening a file

Remember, you are now working with a version controlled project. You checked in all your source files, so now they are read-only. To be able to edit a file, it first has to be checked out.
In the Project Editor
We will check out and edit the file

BackOfficeApplication.java

In the Project Tree, make sure that

backoffice.shared is checkmarked.
In the File List, highlight BackOfficeApplication.java and right-click to choose
Context menu > Check Out BackOfficeApplication.java...
The Check Out dialog appears.

By default, the HEAD version is suggested, which at this time is still the same as the INIT version. With repeated editing, the content will obviously change over time.

- To get a writable version of the file, press Exclusive Lock (the other two lock buttons are relevant only in team projects).
  Notice that, in the Project Editor's File List, the file name now appears in bold typeface. This indicates that it is writable.
- To open
BackOfficeApplication.java double-click on it in the Project Editor's File List.
The file is opened in the Source Editor.