In Netbeans I can create a project using existing sources of Java files. If I want to add additional sources to a project how can I do so?
4 Answers
- right click on project
- "Properties"
- "Sources" (top left in the tree)
- "Source Package Folders:" on the left side of the dialog
- "Add Folder"

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thank you ollins :) is there any way to change that folder icon? – Wally_the_Walrus Jun 28 '13 at 16:36
NetBeans 8.0
You can copy complete packages including sub-packages to the projects /src/
-folder.
Then Source » Scan for External Changes
and the new sources will be added automatically.
Have fun.

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You can attach a source JAR. You also can use the Import Sources module ("File -> Import Sources") to import source files from the file system.

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I had a similar problem where I added files directly to the project path from a file manager and NetBeans did not show them in my project tree.
I found a good solution for my needs using git. As it is good practice to use a repository for code tracking code changes and I will be doing it regardless. Anyway my resolution to the issue is:
Check the "Diff to HEAD" on the main project folder from within the NetBeans interface and the new files are now found...While your there double check your changes and commit.

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