Make helper classes final.

core/src/main/java/com/github/weisj/darklaf/components/ComponentHelper.java

@@ -29,7 +29,7 @@ import javax.swing.*;
 import com.github.weisj.darklaf.components.button.JSplitButton;
 import com.github.weisj.darklaf.ui.button.ButtonConstants;
 
-public class ComponentHelper {
+public final class ComponentHelper {
 
     private ComponentHelper() {
         throw new IllegalStateException("Utility class");

core/src/main/java/com/github/weisj/darklaf/components/DynamicUI.java

@@ -28,7 +28,7 @@ import java.util.function.Consumer;
 
 import javax.swing.*;
 
-public class DynamicUI {
+public final class DynamicUI {
 
     private static final Map<Component, List<Consumer<Component>>> listeners = new WeakHashMap<>();
 

core/src/main/java/com/github/weisj/darklaf/components/iconeditor/IconEditorPanel.java

@@ -348,7 +348,7 @@ public class IconEditorPanel extends JPanel {
         }
     }
 
-    static class IconValues {
+    static final class IconValues {
 
         private static final Map<Theme, SharedComponent<ColorPaletteChooser>> chooserMap = new HashMap<>();
         private static final Map<Theme, SharedComponent<OpacityChooser>> opacityChooserMap = new HashMap<>();

core/src/main/java/com/github/weisj/darklaf/focus/FocusParentHelper.java

@@ -31,7 +31,7 @@ import javax.swing.*;
 
 import com.github.weisj.darklaf.util.PropertyUtil;
 
-public class FocusParentHelper {
+public final class FocusParentHelper {
 
     public static final String KEY_FOCUS_PARENT = "focusParent";
     public static final String KEY_FOCUS_ACTION = "focusOnParentChangedAction";

core/src/main/java/com/github/weisj/darklaf/graphics/PaintUtil.java

@@ -29,7 +29,7 @@ import java.awt.geom.RoundRectangle2D;
 
 import com.github.weisj.darklaf.util.Scale;
 
-public class PaintUtil {
+public final class PaintUtil {
 
     public static final Color TRANSPARENT_COLOR = new Color(0x0, true);
     private static final AlphaComposite transparentComposite =

core/src/main/java/com/github/weisj/darklaf/graphics/StringPainter.java

@@ -37,7 +37,7 @@ import sun.swing.SwingUtilities2;
 import com.github.weisj.darklaf.ui.OpacityBufferedUI;
 import com.github.weisj.darklaf.util.*;
 
-public class StringPainter {
+public final class StringPainter {
 
     private static final Logger LOGGER = LogUtil.getLogger(StringPainter.class);
 
@@ -214,7 +214,7 @@ public class StringPainter {
             Field imgField;
             try {
                 imgField = surfaceDataValue.getClass().getDeclaredField("bufImg"); // BufImgSurfaceData
-            } catch (Exception ignored) {
+            } catch (final Exception ignored) {
                 imgField = surfaceDataValue.getClass().getField("offscreenImage"); // CGLSurfaceData
             }
             imgField.setAccessible(true);
@@ -222,7 +222,7 @@ public class StringPainter {
             if (img instanceof BufferedImage) {
                 return (BufferedImage) img;
             }
-        } catch (Exception e) {
+        } catch (final Exception e) {
             e.printStackTrace();
         }
         return null;

core/src/main/java/com/github/weisj/darklaf/layout/LayoutHelper.java

@@ -36,7 +36,7 @@ import com.github.weisj.darklaf.components.border.DarkBorders;
 import com.github.weisj.darklaf.util.Alignment;
 import com.github.weisj.darklaf.util.DarkUIUtil;
 
-public class LayoutHelper {
+public final class LayoutHelper {
 
     private LayoutHelper() {
         throw new IllegalArgumentException("Utility class");

core/src/main/java/com/github/weisj/darklaf/transfer/TransferUtil.java

@@ -37,7 +37,7 @@ import javax.swing.*;
 import com.github.weisj.darklaf.icons.IconUtil;
 import com.github.weisj.darklaf.util.Pair;
 
-public class TransferUtil {
+public final class TransferUtil {
 
     private TransferUtil() {
         throw new IllegalStateException("Utility class");
@@ -94,7 +94,7 @@ public class TransferUtil {
                 try {
                     // noinspection unchecked
                     importer.accept((T) support.getTransferable().getTransferData(flavor));
-                } catch (Exception ignored) {
+                } catch (final Exception ignored) {
                 }
                 return false;
             }

core/src/main/java/com/github/weisj/darklaf/ui/DividedWidgetPainter.java

@@ -28,7 +28,7 @@ import javax.swing.*;
 import com.github.weisj.darklaf.graphics.PaintUtil;
 import com.github.weisj.darklaf.ui.cell.CellUtil;
 
-public class DividedWidgetPainter {
+public final class DividedWidgetPainter {
 
     public static void paintBackground(final Graphics2D g, final JComponent c, final int arc,
             final Rectangle splitBounds, final Color bg, final Color splitBg, final boolean isCellEditor) {

core/src/main/java/com/github/weisj/darklaf/ui/WidgetPopupHelper.java

@@ -27,7 +27,7 @@ import javax.swing.*;
 
 import com.github.weisj.darklaf.util.DarkUIUtil;
 
-public class WidgetPopupHelper {
+public final class WidgetPopupHelper {
 
     public static Rectangle getPopupBounds(final JComponent parent, final Dimension popupSize,
             final Dimension parentSize) {

core/src/main/java/com/github/weisj/darklaf/ui/cell/CellUtil.java

@@ -35,7 +35,7 @@ import com.github.weisj.darklaf.util.DarkUIUtil;
 import com.github.weisj.darklaf.util.PropertyKey;
 import com.github.weisj.darklaf.util.PropertyUtil;
 
-public class CellUtil {
+public final class CellUtil {
 
     public static final String KEY_SELECTED_CELL_RENDERER = "JComponent.selectedCellRenderer";
 

core/src/main/java/com/github/weisj/darklaf/ui/popupmenu/EventHelperUtil.java

@@ -23,7 +23,7 @@ package com.github.weisj.darklaf.ui.popupmenu;
 
 import javax.swing.plaf.basic.BasicLookAndFeel;
 
-public class EventHelperUtil {
+public final class EventHelperUtil {
 
     private static boolean eventHelperInstallerFlagSet;
 

core/src/main/java/com/github/weisj/darklaf/ui/popupmenu/MouseGrabberUtil.java

@@ -32,7 +32,7 @@ import javax.swing.event.ChangeListener;
 
 import com.github.weisj.darklaf.util.DarkUIUtil;
 
-public class MouseGrabberUtil {
+public final class MouseGrabberUtil {
 
     private MouseGrabberUtil() {}
 

core/src/main/java/com/github/weisj/darklaf/ui/tabframe/TabFrameUtil.java

@@ -31,7 +31,7 @@ import com.github.weisj.darklaf.util.Actions;
 import com.github.weisj.darklaf.util.Alignment;
 import com.github.weisj.darklaf.util.DarkUIUtil;
 
-public class TabFrameUtil {
+public final class TabFrameUtil {
 
     private static final String ACCELERATOR_PREFIX = "accelerator_";
 

core/src/main/java/com/github/weisj/darklaf/ui/text/StyleConstantsEx.java

@@ -21,6 +21,6 @@
  */
 package com.github.weisj.darklaf.ui.text;
 
-public class StyleConstantsEx {
+public final class StyleConstantsEx {
     public static final Object SelectedForeground = "selectedForeground";
 }

core/src/main/java/com/github/weisj/darklaf/ui/tooltip/ToolTipUtil.java

@@ -32,7 +32,7 @@ import com.github.weisj.darklaf.util.Alignment;
 import com.github.weisj.darklaf.util.DarkUIUtil;
 import com.github.weisj.darklaf.util.WindowUtil;
 
-public class ToolTipUtil {
+public final class ToolTipUtil {
 
     public static void applyContext(final JToolTip toolTip) {
         JComponent target = toolTip.getComponent();

core/src/main/java/com/github/weisj/darklaf/util/DnDUtil.java

@@ -25,7 +25,7 @@ import java.awt.*;
 
 import com.github.weisj.darklaf.graphics.PaintUtil;
 
-public class DnDUtil {
+public final class DnDUtil {
 
     public static Image createDragImage(final Component c, final int lw, final Color borderColor) {
         return createDragImage(c, new Rectangle(0, 0, c.getWidth(), c.getHeight()), lw, borderColor);

core/src/main/java/com/github/weisj/darklaf/util/ResourceUtil.java

@@ -25,7 +25,7 @@ import java.awt.*;
 
 import com.github.weisj.darklaf.DarkLaf;
 
-public class ResourceUtil {
+public final class ResourceUtil {
 
     private static final String BUNDLE_DIR = "bundles";
 

core/src/main/java/com/github/weisj/darklaf/util/SwingXUtil.java

@@ -29,7 +29,7 @@ import javax.swing.*;
 import org.jdesktop.jxlayer.JXLayer;
 import org.pbjar.jxlayer.plaf.ext.TransformUI;
 
-public class SwingXUtil {
+public final class SwingXUtil {
 
     @SuppressWarnings("unchecked")
     public static Point convertPointToParent(final Component source, final Point p) {

core/src/main/java/com/github/weisj/darklaf/util/WindowUtil.java

@@ -28,7 +28,7 @@ import javax.swing.event.AncestorEvent;
 
 import com.github.weisj.darklaf.listener.AncestorAdapter;
 
-public class WindowUtil {
+public final class WindowUtil {
 
     public static void moveWindow(final Window w, final JComponent content, final int x, final int y) {
         w.setLocation(x, y);

core/src/test/java/test/TestUtils.java

@@ -28,7 +28,7 @@ import javax.swing.*;
 
 import org.junit.jupiter.api.Assertions;
 
-class TestUtils {
+final class TestUtils {
 
     private TestUtils() {}
 
@@ -38,14 +38,14 @@ class TestUtils {
             SwingUtilities.invokeAndWait(() -> {
                 try {
                     action.run();
-                } catch (Exception e) {
+                } catch (final Exception e) {
                     exceptionRef.set(e);
                 }
             });
-        } catch (InterruptedException e) {
+        } catch (final InterruptedException e) {
             e.printStackTrace();
             Assertions.fail(e.getMessage(), e);
-        } catch (InvocationTargetException e) {
+        } catch (final InvocationTargetException e) {
             e.getTargetException().printStackTrace();
             Throwable target = e.getTargetException();
             Assertions.fail(target.getMessage(), target);

core/src/test/java/ui/DemoResources.java

@@ -25,7 +25,7 @@ import javax.swing.*;
 
 import com.github.weisj.darklaf.util.DarkUIUtil;
 
-public class DemoResources {
+public final class DemoResources {
     public static final String LOREM_IPSUM =
             "Lorem ipsum dolor sit amet, consectetur adipiscing elit. In tempor quis nibh a semper. Nullam\n"
                     + " auctor, erat non viverra commodo, libero orci aliquam quam, ac interdum nunc est sed\n "

core/src/test/java/util/ClassFinder.java

@@ -29,7 +29,7 @@ import java.util.stream.Collectors;
 
 import com.github.weisj.darklaf.util.Lambdas;
 
-public class ClassFinder {
+public final class ClassFinder {
 
     public static <T> List<T> getInstancesOfType(final Class<T> type, final String... packages) {
         try (ResourceWalker walker = ResourceWalker.walkResources(packages)) {

macos/src/main/java/com/github/weisj/darklaf/platform/macos/JNIDecorationsMacOS.java

@@ -23,7 +23,7 @@ package com.github.weisj.darklaf.platform.macos;
 
 import java.awt.*;
 
-public class JNIDecorationsMacOS {
+public final class JNIDecorationsMacOS {
 
     public static native long getComponentPointer(final Window window);
 

macos/src/main/java/com/github/weisj/darklaf/platform/macos/JNIThemeInfoMacOS.java

@@ -25,7 +25,7 @@ import java.awt.*;
 
 import com.github.weisj.darklaf.platform.macos.theme.MacOSColors;
 
-public class JNIThemeInfoMacOS {
+public final class JNIThemeInfoMacOS {
 
     /**
      * Returns whether dark mode is enabled.

macos/src/main/java/com/github/weisj/darklaf/platform/macos/theme/MacOSColors.java

@@ -23,7 +23,7 @@ package com.github.weisj.darklaf.platform.macos.theme;
 
 import java.awt.*;
 
-public class MacOSColors {
+public final class MacOSColors {
 
     // 0.000000 0.478431 1.000000
     public static final Color ACCENT_BLUE = color(0.000000f, 0.478431f, 1.000000f);

macos/src/main/java/com/github/weisj/darklaf/platform/macos/ui/MacOSDecorationsUtil.java

@@ -29,7 +29,7 @@ import com.github.weisj.darklaf.platform.macos.JNIDecorationsMacOS;
 import com.github.weisj.darklaf.util.PropertyUtil;
 import com.github.weisj.darklaf.util.SystemInfo;
 
-public class MacOSDecorationsUtil {
+public final class MacOSDecorationsUtil {
 
     private static final String FULL_WINDOW_CONTENT_KEY = "apple.awt.fullWindowContent";
     private static final String TRANSPARENT_TITLE_BAR_KEY = "apple.awt.transparentTitleBar";

native-utils/src/main/java/com/github/weisj/darklaf/platform/NativeUtil.java

@@ -37,7 +37,7 @@ import java.nio.file.*;
  * @see <a href=
  *      "https://github.com/adamheinrich/native-utils">https://github.com/adamheinrich/native-utils</a>
  */
-public class NativeUtil {
+public final class NativeUtil {
 
     public static final String NATIVE_FOLDER_PATH_PREFIX = "nativeutils";
     /**
@@ -93,10 +93,10 @@ public class NativeUtil {
         try (InputStream is = NativeUtil.class.getResourceAsStream(path)) {
             if (!temporaryDir.toFile().canWrite()) throw new IOException("Can't write to temporary directory.");
             Files.copy(is, temp.toAbsolutePath(), StandardCopyOption.REPLACE_EXISTING);
-        } catch (IOException e) {
+        } catch (final IOException e) {
             delete(temp);
             throw e;
-        } catch (NullPointerException e) {
+        } catch (final NullPointerException e) {
             delete(temp);
             throw new FileNotFoundException("File " + path + " was not found inside JAR.");
         }
@@ -117,7 +117,7 @@ public class NativeUtil {
     private static void delete(final Path path) {
         try {
             Files.deleteIfExists(path);
-        } catch (IOException ignored) {
+        } catch (final IOException ignored) {
         }
     }
 

property-loader/src/main/java/com/github/weisj/darklaf/icons/IconUtil.java

@@ -33,7 +33,7 @@ import com.github.weisj.darklaf.util.ImageUtil;
 import com.github.weisj.darklaf.util.PropertyKey;
 import com.github.weisj.darklaf.util.Scale;
 
-public class IconUtil {
+public final class IconUtil {
 
     private static final int FRAME_ICON_SIZE = 32;
     private static final Map<Window, Icon> windowIconSet = new WeakHashMap<>();

utils/src/main/java/com/github/weisj/darklaf/util/Actions.java

@@ -26,7 +26,7 @@ import java.awt.event.ActionListener;
 
 import javax.swing.*;
 
-public class Actions {
+public final class Actions {
 
     public static Action create(final ActionListener action) {
         return new AbstractAction() {

utils/src/main/java/com/github/weisj/darklaf/util/FontUtil.java

@@ -27,7 +27,7 @@ import javax.swing.*;
 import javax.swing.text.StyleContext;
 
 
-public class FontUtil {
+public final class FontUtil {
 
     public static Font createFont(final String family, final int style, final int size) {
         // This method calls FontUtilities.getCompositeFontUIResource(Font) internally which

utils/src/main/java/com/github/weisj/darklaf/util/Lambdas.java

@@ -26,7 +26,7 @@ import java.util.function.Function;
 import java.util.function.Predicate;
 import java.util.function.Supplier;
 
-public class Lambdas {
+public final class Lambdas {
 
     private Lambdas() {}
 

utils/src/main/java/com/github/weisj/darklaf/util/LogUtil.java

@@ -28,7 +28,7 @@ import java.util.logging.Logger;
 import com.github.weisj.darklaf.log.DarkLogHandler;
 import com.github.weisj.darklaf.log.LogFormatter;
 
-public class LogUtil {
+public final class LogUtil {
 
     private static final Logger PARENT = Logger.getLogger("com.github.weisj.darklaf");
     private static final Handler LOG_HANDLER = new DarkLogHandler();

utils/src/main/java/com/github/weisj/darklaf/util/PropertyKey.java

@@ -23,7 +23,7 @@ package com.github.weisj.darklaf.util;
 
 import javax.swing.*;
 
-public class PropertyKey {
+public final class PropertyKey {
     public static final String UI = "UI";
     public static final String COMPONENT_ORIENTATION = "componentOrientation";
     public static final String LAYOUT_ORIENTATION = "layoutOrientation";

utils/src/main/java/com/github/weisj/darklaf/util/PropertyUtil.java

@@ -32,7 +32,7 @@ import javax.swing.*;
 import javax.swing.border.Border;
 import javax.swing.plaf.UIResource;
 
-public class PropertyUtil {
+public final class PropertyUtil {
 
     public static void installSystemProperty(final String key, final String value) {
         String current = System.getProperty(key);

utils/src/main/java/com/github/weisj/darklaf/util/PropertyValue.java

@@ -21,7 +21,7 @@
  */
 package com.github.weisj.darklaf.util;
 
-public class PropertyValue {
+public final class PropertyValue {
     public static final String TRUE = "true";
     public static final String FALSE = "false";
     public static final String NULL = "null";

utils/src/main/java/com/github/weisj/darklaf/util/Scale.java

@@ -25,7 +25,7 @@ import java.awt.*;
 import java.awt.geom.AffineTransform;
 import java.awt.geom.NoninvertibleTransformException;
 
-public class Scale {
+public final class Scale {
     public static final double SCALE;
     public static final double SCALE_X;
     public static final double SCALE_Y;
@@ -151,7 +151,7 @@ public class Scale {
     public static Point inverseScale(final GraphicsConfiguration gc, final Point p) {
         try {
             return (Point) gc.getDefaultTransform().inverseTransform(p, p);
-        } catch (NoninvertibleTransformException e) {
+        } catch (final NoninvertibleTransformException e) {
             return p;
         }
     }

utils/src/main/java/com/github/weisj/darklaf/util/StreamUtil.java

@@ -28,7 +28,7 @@ import java.util.Spliterators;
 import java.util.stream.Stream;
 import java.util.stream.StreamSupport;
 
-public class StreamUtil {
+public final class StreamUtil {
 
     private StreamUtil() {}
 

utils/src/main/java/com/github/weisj/darklaf/util/SystemInfo.java

@@ -25,7 +25,7 @@ import java.util.Locale;
 import java.util.regex.Pattern;
 
 /** @author Konstantin Bulenkov */
-public class SystemInfo {
+public final class SystemInfo {
     public static final String X86 = "32";
     public static final String X64 = "64";
     public static final String OS_NAME = System.getProperty("os.name");

utils/src/main/java/com/github/weisj/darklaf/util/Types.java

@@ -21,7 +21,7 @@
  */
 package com.github.weisj.darklaf.util;
 
-public class Types {
+public final class Types {
 
     private Types() {
         throw new IllegalStateException("Utility class");

windows/src/main/java/com/github/weisj/darklaf/platform/windows/JNIDecorationsWindows.java

@@ -22,7 +22,7 @@
 package com.github.weisj.darklaf.platform.windows;
 
 /** @author Jannis Weis */
-public class JNIDecorationsWindows {
+public final class JNIDecorationsWindows {
 
     public static native void updateValues(final long hwnd, final int left, final int right, final int height);
 

windows/src/main/java/com/github/weisj/darklaf/platform/windows/JNIThemeInfoWindows.java

@@ -21,7 +21,7 @@
  */
 package com.github.weisj.darklaf.platform.windows;
 
-public class JNIThemeInfoWindows {
+public final class JNIThemeInfoWindows {
 
     /**
      * Returns whether dark mode is enabled.

windows/src/main/java/com/github/weisj/darklaf/platform/windows/PointerUtil.java

@@ -27,7 +27,7 @@ import javax.swing.*;
 
 import com.sun.jna.Native;
 
-public class PointerUtil {
+public final class PointerUtil {
 
     /**
      * Get the window handle for the window the given component descends from.