fly on exercises

data/3.Java高阶/2.Lambda表达式/config.json

@@ -6,6 +6,5 @@
     "lambda.json",
     "sam.json",
     "handler.json"
-  ],
-  "title": "Lambda表达式"
+  ]
 }
\ No newline at end of file

data/3.Java高阶/2.Lambda表达式/handler.md

@@ -7,7 +7,7 @@ import java.util.function.Function;
         
 public class App {
     public <T, R> product(Function<T, R> consumer) {
-        // 这里有一段代码生成了 T value 变量 
+        // 省略了 T value 变量 定义代码 
         return consumer(value);
     }
     // 省略其它代码

data/tree.json

@@ -3975,35 +3975,19 @@
               "通过行为参数化传递代码": {
                 "node_id": "java-fb711fb0dfbb40db974476ea2d9faf9d",
                 "keywords": [],
-                "children": [
-                  {
-                    "行为参数化": {
-                      "node_id": "java-3a05a505cd514579a52321f0c945d577",
-                      "keywords": [],
-                      "children": []
-                    }
-                  },
-                  {
-                    "简写": {
-                      "node_id": "java-b121d453fc544e188b9ad50476c22f59",
-                      "keywords": [],
-                      "children": []
-                    }
-                  },
-                  {
-                    "高序函数": {
-                      "node_id": "java-db33d9c7f2004cdbbc058254fe536ace",
-                      "keywords": [],
-                      "children": []
-                    }
-                  }
-                ]
+                "children": []
               }
             },
             {
               "Lambda表达式": {
                 "node_id": "java-a3b60740abe74bb8a6c16dec381d31c4",
-                "keywords": [],
+                "keywords": [
+                  "lambda",
+                  "高阶函数",
+                  "方法引用",
+                  "SAM",
+                  "函数式接口"
+                ],
                 "children": [
                   {
                     "Lambda概念": {