Sources Tab

Language level list

Item	Description
Language level	Use this list to select the Java language level for the module. The available options correspond to JSDK versions. You can select the level set for the project (the option <Use project language level>) or set an individual level for the module.

The left-hand pane

The left-hand pane shows the module content roots.

For each content root, a categorized view of the module folders is provided. The categories are the source folders, test source folders and excluded folders. The folders that don't belong to any of these categories are not shown in this view.

The individual folders within the categories are identified by their paths. The folder paths are all relative to the module root folder (content root).

The folder paths, functionally, are hyperlinks that let you jump to the corresponding folders in the tree shown in the right-hand pane.

If a module has more than one content root, selecting a content root in the left-hand pane also switches the tree view in the right-hand pane. That is, when you click somewhere within the content root area, the folder structure of this particular content root is shown in the right-hand pane.

The following table lists the controls available in the right-hand pane (icons) and describes their functions.

Icon	Tooltip	Description
	Add Content Root	Use this icon to add another content root. Select the desired folder in the dialog that opens.
	Remove Content Entry	Use this icon to remove the corresponding content root from the list of the content roots.
	Set Package Prefix	Use this icon to open the Set Package Prefix dialog in which you can specify a package prefix for the selected source or test source folder.
	Unmark	Use this icon to remove the folder from the corresponding category. As a result, the folder becomes "an ordinary folder", that is, not belonging to any specific category.

The right-hand pane

The right-hand pane shows a tree of folders for a module content root. If the module has more than one content root, the structure shown corresponds to the content root selected in the left-hand pane.

The folders belonging to different categories have different colors.

The following table lists the available toolbar buttons (the Icon column) and explains their functions (the Description column). Note that the corresponding functions can also be accessed as the context menu commands. These are listed in the Command column.

Icon	Command	Description
	Sources	Use this icon or command to assign the selected folder to the source folder category. Note that this icon/command works as a toggle. So it can also be used to cancel the assignment. Also note that the folder marked as the source folder appears in the corresponding category in the left-hand pane.
	Test Sources	Use this icon or command to assign the selected folder to the test sources. Note that this icon/command works as a toggle. So it can also be used to cancel the assignment. Also note that the folder marked as the test source folder appears in the corresponding category in the left-hand pane.
	Excluded	Use this icon or command to make the selected folder excluded. Note that this icon/command works as a toggle. So it can also be used to cancel the folder exclusion. Also note that the folder marked as excluded appears in the corresponding category in the left-hand pane.
	New Folder	Use this command to create a folder in the selected folder. Specify the name for the new folder in the New Folder dialog.