fixed structure bugs

data/3.Java高阶/3.Java异步任务/1.线程与进程/config.json

@@ -8,6 +8,7 @@
   ],
   "children": [],
   "export": [
-    "thread.json"
+    "thread.json",
+    "counter.json"
   ]
 }
\ No newline at end of file

data/3.Java高阶/3.Java异步任务/1.线程与进程/counter.json

+{
+  "type": "code_options",
+  "author": "ccat",
+  "source": "counter.md",
+  "notebook_enable": false,
+  "exercise_id": "c1b604a5d2364a969361cd5fbb4ed3f8"
+}
\ No newline at end of file

data/3.Java高阶/3.Java异步任务/2.Future与CompletableFuture/config.json

@@ -6,6 +6,6 @@
     "future"
   ],
   "children": [],
-  "export": [],
+  "export": ["future.json"],
   "title": "为并发而生的CompletableFuture和结合器"
 }
\ No newline at end of file

data/3.Java高阶/3.Java异步任务/2.Future与CompletableFuture/future.json

@@ -2,5 +2,6 @@
   "type": "code_options",
   "author": "ccat",
   "source": "future.md",
-  "notebook_enable": false
+  "notebook_enable": false,
+  "exercise_id": "ccfff6d27a01476a9003a89ff933d688"
 }
\ No newline at end of file