diff --git a/src/main/java/org/jcnc/jnotepad/app/i18n/UIResourceBundle.java b/src/main/java/org/jcnc/jnotepad/app/i18n/UIResourceBundle.java
index dc17d43..6135098 100644
--- a/src/main/java/org/jcnc/jnotepad/app/i18n/UIResourceBundle.java
+++ b/src/main/java/org/jcnc/jnotepad/app/i18n/UIResourceBundle.java
@@ -10,11 +10,22 @@ import org.jcnc.jnotepad.app.config.LocalizationConfig;
 import java.util.Locale;
 import java.util.ResourceBundle;
 
+/**
+ * UI资源绑定，用于加载语言文件。
+ *
+ * @author songdragon
+ */
 public class UIResourceBundle {
 
     private static final UIResourceBundle INSTANCE = new UIResourceBundle();
+    /**
+     * resource目录下的i18n/i18nXXX.properties
+     */
     private static final String BASENAME = "i18n/i18n";
 
+    /**
+     * 当前语言
+     */
     private Locale currentLocale;
 
     public static final UIResourceBundle getInstance() {
@@ -25,8 +36,15 @@ public class UIResourceBundle {
         this.resetLocal();
     }
 
+    /**
+     * 资源文件的观察者绑定。
+     */
     private ObjectProperty<ResourceBundle> resources = new SimpleObjectProperty<>();
 
+    /**
+     * 获取当前资源文件
+     * @return
+     */
     public ObjectProperty<ResourceBundle> resourcesProperty() {
         return resources;
     }
@@ -39,6 +57,9 @@ public class UIResourceBundle {
         resourcesProperty().set(resources);
     }
 
+    /**
+     * 重置当前local
+     */
     public final void resetLocal() {
         if (this.currentLocale == LocalizationConfig.getCurrentLocal()) {
             return;
@@ -49,6 +70,11 @@ public class UIResourceBundle {
 
     }
 
+    /**
+     * 获取key对应的绑定属性内容
+     * @param key key
+     * @return key对应的内容
+     */
     public StringBinding getStringBinding(String key) {
         return new StringBinding() {
             {
@@ -62,6 +88,11 @@ public class UIResourceBundle {
         };
     }
 
+    /**
+     * 工具方法：绑定StringProperty和Key对应的内容
+     * @param stringProperty
+     * @param key
+     */
     public static void bindStringProperty(StringProperty stringProperty, String key) {
         if (stringProperty == null) {
             return;
@@ -69,10 +100,19 @@ public class UIResourceBundle {
         stringProperty.bind(getInstance().getStringBinding(key));
     }
 
+    /**
+     * 获取当前资源中的key值
+     * @param key
+     * @return
+     */
     public static String getContent(String key) {
         return getInstance().getResources().getString(key);
     }
 
+    /**
+     * 注册资源变更监听器
+     * @param listener
+     */
     public void addListener(ChangeListener<? super ResourceBundle> listener) {
         this.resources.addListener(listener);
     }