diff --git a/src/main/java/LanguageFileCompare.java b/src/main/java/LanguageFileCompare.java
index f4791f1504c561202991028355b6d1a15ef1738e..68368c1eac7614f2aa9a85d3e8eec528d5f4483e 100644
--- a/src/main/java/LanguageFileCompare.java
+++ b/src/main/java/LanguageFileCompare.java
@@ -19,12 +19,15 @@ public class LanguageFileCompare {
   public static void main(String[] args) {
     try {
       ObjectMapper objectMapper = new ObjectMapper();
-      Path originPath = Paths.get(args[0]);
-      JsonNode twJson = objectMapper.readTree(new String(Files.readAllBytes(originPath)));
-      Set<String> originSet = new HashSet<>();
-      addKeys("", twJson, originSet, new ArrayList<>());
+      if (args.length > 0) {
+        Path originPath = Paths.get(args[0]);
+        JsonNode twJson = objectMapper.readTree(new String(Files.readAllBytes(originPath)));
+        Set<String> originSet = new HashSet<>();
+        addKeys("", twJson, originSet, new ArrayList<>());
 
-      IntStream.range(1, args.length).forEach(i -> findMissingKeys(Paths.get(args[i]), originSet));
+        IntStream.range(1, args.length)
+            .forEach(i -> findMissingKeys(Paths.get(args[i]), originSet));
+      }
     } catch (Exception e) {
       log.error("{} is not exists or not json files.", args[0], e);
       System.exit(1);
@@ -87,9 +90,9 @@ public class LanguageFileCompare {
 
     Map<String, List<String>> map =
         Arrays.stream(
-            Optional.ofNullable(
-                Paths.get(path).toFile().list((dir, name) -> name.endsWith(extension)))
-                .orElse(new String[0]))
+                Optional.ofNullable(
+                        Paths.get(path).toFile().list((dir, name) -> name.endsWith(extension)))
+                    .orElse(new String[0]))
             .map(s -> s.split(extension)[0])
             .collect(
                 Collectors.groupingBy(