Intellij: What causes a dark green inspection highlight?

Question

After searching forums and stackoverflow I can't see to figure out what this inspection highlight is trying to alert me to:

Selecting/hovering over the highlighted text returns nothing besides the standard context actions.

Originally these variables were declared and instantiated before the constructor. (ACTIONS TAKEN TO REPRODUCE) When I used the context action "Move initialization to constructor", the initializations in the constructor are highlighted dark green. See attached img.

Anyone know what's going on here?

example:

public class HoaQueueEditorDialog extends ListDialogBase implements Mutable {

    private static final String SAVE = "Save";
    private static final String CANCEL = "Cancel";
    private static final String CHAR_DELIMITER = ",";
    private static final String[] COL_NAMES = {"Workflow Step Name"};
    private static final Color NORM_BACKGROUND = TRexUIManager.getColor(TRexUIManager.CONTENT_BACKGROUND);
    private static final Color NORM_FOREGROUND = Color.black;
    private static final int[] COL_WIDTHS = {325};
    private static final ArrayList<AppOptionsUtil.WorkflowStepInfo> SUPPORTED_STEPS_LIST = AppOptionsUtil.getDisplayHoaInfoWfStepsSupportedList();

    // UI Elements
    private TButton saveButton;
    private TButton cancelButton;
    private JPanel parentPanel;
    private JPanel buttonPanelRight;
    private JPanel buttonPanelLeft;

    // Stores the data necessary to build a table row and it's corresponding checkbox object.
    protected HashMap<AppOptionsUtil.WorkflowStepInfo, TCheckBox> checkBoxMap;

    private TTable wfQueuesTable;
    private DefaultTableModel tableModel;

    private TChangeListener changeListener = null;

    private boolean escKeyPressedInsideYesNoCancel = false;

    private String originalAppOptionValues = null;
    private String returnAppOptionValues = null;

    public HoaQueueEditorDialog() {
        try {
            this.tableModel = new DefaultTableModel(new Object[][]{{}}, COL_NAMES);
            this.wfQueuesTable = new TTable();
            wfQueuesTable.setModel(tableModel);
            wfQueuesTable.setBackground(NORM_BACKGROUND);
            wfQueuesTable.setRowHeight(42);
            wfQueuesTable.getSelectionModel().addListSelectionListener(new DocumentTableSelectionListener());

            init();
            initMVC();
            this.setResizable(true);
        } catch (Exception ex) {
            TRexToolkit.showErrorMessage("Error initializing Document Print Screen.", "Error", ex);
        }
        buttonPanelLeft = new JPanel(new FlowLayout(LEFT));
        buttonPanelRight = new JPanel(new FlowLayout(RIGHT));
        parentPanel = new JPanel();
    }

Answer 1

IntelliJ IDEA is highlighting the changes it made when you invoked the Move initialization to constructor intention. Because the changes are quite far away from the cursor, you might not see them otherwise. Pressing Escape will remove the highlighting.