diff --git a/src/main/java/com/hankcs/hanlp/classification/corpus/Catalog.java b/src/main/java/com/hankcs/hanlp/classification/corpus/Catalog.java
index 6a0115ca5..dcab05b71 100644
--- a/src/main/java/com/hankcs/hanlp/classification/corpus/Catalog.java
+++ b/src/main/java/com/hankcs/hanlp/classification/corpus/Catalog.java
@@ -69,6 +69,11 @@ public String getCategory(int id)
         return idCategory.get(id);
     }
 
+    public List<String> getCategories()
+    {
+        return idCategory;
+    }
+
     public int size()
     {
         return idCategory.size();
@@ -81,4 +86,10 @@ public String[] toArray()
 
         return catalog;
     }
+
+    @Override
+    public String toString()
+    {
+        return idCategory.toString();
+    }
 }