Moved responsibility of loading the accent properties to the theme class.

core/src/main/java/com/github/weisj/darklaf/task/AccentColorAdjustmentTask.java

@@ -49,8 +49,8 @@ public class AccentColorAdjustmentTask extends ColorAdjustmentTask {
 
     public void applyColors(final Theme currentTheme, final Properties properties,
                             final Color accentColor, final Color selectionColor) {
-        Properties props = currentTheme.loadPropertyFile("accents", true);
-        if (props.isEmpty()) return;
+        Properties props = currentTheme.loadAccentProperties();
+        if (props == null || props.isEmpty()) return;
         if (accentColor != null) {
             adjustColors(MAIN_ACCENT_LIST_KEY, accentColor, props, properties);
         }

theme/src/main/java/com/github/weisj/darklaf/theme/Theme.java

@@ -213,6 +213,16 @@ public abstract class Theme implements Comparable<Theme>, Comparator<Theme> {
         PropertyLoader.putProperties(loadPropertyFile(propertySuffix), properties, currentDefaults);
     }
 
+    /**
+     * Load the properties specifying how to map the colors from the {@link AccentColorRule} are mapped to the
+     * properties.
+     *
+     * @return the properties providing the mapping rules.
+     */
+    public Properties loadAccentProperties() {
+        return loadPropertyFile("accents", true);
+    }
+
     /**
      * Load a .properties file using {@link #getLoaderClass()}} to resolve the file path.
      * <p>
@@ -235,6 +245,10 @@ public abstract class Theme implements Comparable<Theme>, Comparator<Theme> {
     protected final Properties loadWithClass(final String name, final Class<?> loaderClass) {
         final Properties properties = new Properties();
         try (InputStream stream = loaderClass.getResourceAsStream(name)) {
+            if (stream == null) {
+                LOGGER.log(Level.SEVERE, "Could not load " + name + ".properties. File not found");
+                return properties;
+            }
             properties.load(stream);
         } catch (Exception e) {
             LOGGER.log(Level.SEVERE, "Could not load " + name + ".properties. " + e.getMessage(), e.getStackTrace());