clean skill tree

data/1.Java初阶/9.控制执行流程/4.通过异常处理错误/config.json

@@ -8,16 +8,6 @@
     "finally"
   ],
   "children": [
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-        "children": [],
-        "node_id": "java-22d139aee4b640beaff3f5f983c9f4e8",
-        "title": "概念",
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     {
       "捕获异常": {
         "keywords": [],
@@ -29,7 +19,7 @@
       }
     },
     {
-      "创建自定义异常": {
+      "自定义异常": {
         "keywords": [],
         "children": [],
         "node_id": "java-c2463f0ab5784161a9b3c086ca8f31ff",
@@ -38,198 +28,14 @@
       }
     },
     {
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         "children": [
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-            "特例: RuntimeException（运行时异常）": {
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-            "把“受检查异常”转换为“不受检查的异常”": {
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   "export": [