restructure

data/1.Java初阶/7.集合/1.Collection接口/collection.json

+{
+  "type": "code_options",
+  "author": "熊克斐",
+  "source": "collection.md",
+  "exercise_id": "2093199b35de4a12af7f61f78d53cf03",
+  "notebook_enable": false
+}
\ No newline at end of file

data/1.Java初阶/7.集合/1.Collection接口/config.json

@@ -2,6 +2,6 @@
   "node_id": "java-73271e880f0843f69437427bfc557ff2",
   "keywords": [],
   "children": [],
-  "export": [],
+  "export": ["collection.json"],
   "title": "Collection接口"
 }
\ No newline at end of file

data/1.Java初阶/7.集合/2.List接口/list.json

+{
+    "type": "code_options",
+    "author": "熊克斐",
+    "source": "list.md",
+    "exercise_id": "",
+    "notebook_enable": false
+}
\ No newline at end of file

data/1.Java初阶/7.集合/3.Collection集合遍历/config.json

@@ -27,6 +27,6 @@
       }
     }
   ],
-  "export": [],
+  "export": ["iteratable.json"],
   "title": "Collection集合遍历"
 }
\ No newline at end of file

data/1.Java初阶/7.集合/3.Collection集合遍历/iteratable.json

+{
+  "type": "code_options",
+  "author": "熊克斐",
+  "source": "iteratable.md",
+  "exercise_id": "8dfe5c09ae5b4ab28cdd7e5bbd47e1f5",
+  "notebook_enable": false
+}
\ No newline at end of file

data/1.Java初阶/7.集合/4.Set接口/config.json

@@ -27,6 +27,6 @@
       }
     }
   ],
-  "export": [],
+  "export": ["set.json"],
   "title": "Set接口"
 }
\ No newline at end of file

data/1.Java初阶/7.集合/4.Set接口/set.json

+{
+  "type": "code_options",
+  "author": "熊克斐",
+  "source": "set.md",
+  "exercise_id": "cc8434cfc00d4934a805ecafb3a22085",
+  "notebook_enable": false
+}
\ No newline at end of file

data/1.Java初阶/7.集合/5.Map接口/config.json

@@ -41,6 +41,6 @@
       }
     }
   ],
-  "export": [],
+  "export": ["map.json"],
   "title": "Map接口"
 }
\ No newline at end of file

data/1.Java初阶/7.集合/5.Map接口/map.json

+{
+  "type": "code_options",
+  "author": "熊克斐",
+  "source": "map.md",
+  "exercise_id": "140f1304905a4bffbd480b3361ee3005",
+  "notebook_enable": false
+}
\ No newline at end of file

data/1.Java初阶/7.集合/6.Java集合框架/collection.json

+{
+  "type": "code_options",
+  "author": "熊克斐",
+  "source": "collection.md",
+  "exercise_id": "302ce900fc934979af1e476a6964034c",
+  "notebook_enable": false
+}
\ No newline at end of file

data/1.Java初阶/7.集合/8.Java集合框架/config.json → data/1.Java初阶/7.集合/6.Java集合框架/config.json

@@ -19,6 +19,6 @@
       }
     }
   ],
-  "export": [],
+  "export": ["collection.json"],
   "title": "Java集合框架"
 }
\ No newline at end of file

data/1.Java初阶/7.集合/6.常用工具类/config.json

-{
-  "node_id": "java-61ba5b89d4284c1b9d59436bce805640",
-  "keywords": [],
-  "children": [
-    {
-      "Collections工具类": {
-        "keywords": [],
-        "children": [],
-        "node_id": "java-a07f943448184bf985a9f929567ed94e",
-        "title": "Collections工具类"
-      }
-    },
-    {
-      "Arrays工具类": {
-        "keywords": [],
-        "children": [],
-        "node_id": "569d5e11c4fc5de7844053d9a733c5e8",
-        "title": "Arrays工具类"
-      }
-    }
-  ],
-  "export": [],
-  "title": "常用工具类"
-}
\ No newline at end of file

data/1.Java初阶/7.集合/6.常用工具类/util.md

-# 工具类
-
-如果想实现1～10之间的随机数，下面哪个代码可以实现：
-
-## 答案
-
-A
-
-## 选项
-
-### A
-
-```java
-
-Random random = new Random();
-int result = random.nextInt(10);
-result = result + 1;
-```
-
-### B
-
-```java
-
-Random random = new Random();
-int result = random.nextInt(1);
-result = result + 10;
-```
-
-### C
-
-```java
-
-int max = 10;
-int min = 1;
-Random random = new Random();
-int result = random.nextInt(min) % (max - min + 1) + min;
-System.out.println(result);
-```
-
-### D
-
-以上都是

data/1.Java初阶/7.集合/7.聚合操作/config.json

-{
-  "node_id": "java-2d3c1265286d4b58a87650a633ba2373",
-  "keywords": [],
-  "children": [
-    {
-      "聚合操作简介": {
-        "keywords": [],
-        "children": [],
-        "node_id": "java-4c3e7ab968f04393af0c008d7ab6fcc7",
-        "title": "聚合操作简介"
-      }
-    },
-    {
-      "创建Stream流对象": {
-        "keywords": [],
-        "children": [],
-        "node_id": "569d5e11c4fc5de7844053d9a733c5e8",
-        "title": "创建Stream流对象"
-      }
-    },
-    {
-      "Stream流的常用方法": {
-        "keywords": [],
-        "children": [],
-        "node_id": "569d5e11c4fc5de7844053d9a733c5e8",
-        "title": "Stream流的常用方法"
-      }
-    },
-    {
-      "Parallel Stream（并行流）": {
-        "keywords": [],
-        "children": [],
-        "node_id": "569d5e11c4fc5de7844053d9a733c5e8"
-      }
-    }
-  ],
-  "export": [],
-  "title": "聚合操作"
-}
\ No newline at end of file

data/1.Java初阶/7.集合/9.集合框架中的接口/config.json

-{
-  "node_id": "java-b65776c30f4e4aaf99d8bc8b66855e7c",
-  "keywords": [],
-  "children": [],
-  "export": [],
-  "title": "集合框架中的接口"
-}
\ No newline at end of file

data/tree.json

@@ -377,69 +377,6 @@
                       ]
                     }
                   },
-                  {
-                    "常用工具类": {
-                      "node_id": "java-61ba5b89d4284c1b9d59436bce805640",
-                      "keywords": [],
-                      "children": [
-                        {
-                          "Collections工具类": {
-                            "keywords": [],
-                            "children": [],
-                            "node_id": "java-a07f943448184bf985a9f929567ed94e",
-                            "title": "Collections工具类"
-                          }
-                        },
-                        {
-                          "Arrays工具类": {
-                            "keywords": [],
-                            "children": [],
-                            "node_id": "569d5e11c4fc5de7844053d9a733c5e8",
-                            "title": "Arrays工具类"
-                          }
-                        }
-                      ]
-                    }
-                  },
-                  {
-                    "聚合操作": {
-                      "node_id": "java-2d3c1265286d4b58a87650a633ba2373",
-                      "keywords": [],
-                      "children": [
-                        {
-                          "聚合操作简介": {
-                            "keywords": [],
-                            "children": [],
-                            "node_id": "java-4c3e7ab968f04393af0c008d7ab6fcc7",
-                            "title": "聚合操作简介"
-                          }
-                        },
-                        {
-                          "创建Stream流对象": {
-                            "keywords": [],
-                            "children": [],
-                            "node_id": "569d5e11c4fc5de7844053d9a733c5e8",
-                            "title": "创建Stream流对象"
-                          }
-                        },
-                        {
-                          "Stream流的常用方法": {
-                            "keywords": [],
-                            "children": [],
-                            "node_id": "569d5e11c4fc5de7844053d9a733c5e8",
-                            "title": "Stream流的常用方法"
-                          }
-                        },
-                        {
-                          "Parallel Stream（并行流）": {
-                            "keywords": [],
-                            "children": [],
-                            "node_id": "569d5e11c4fc5de7844053d9a733c5e8"
-                          }
-                        }
-                      ]
-                    }
-                  },
                   {
                     "Java集合框架": {
                       "node_id": "java-860b3800347942d2857795251974730b",
@@ -464,13 +401,6 @@
                       ]
                     }
                   },
-                  {
-                    "集合框架中的接口": {
-                      "node_id": "java-b65776c30f4e4aaf99d8bc8b66855e7c",
-                      "keywords": [],
-                      "children": []
-                    }
-                  },
                   {
                     "链表": {
                       "node_id": "java-bfbb4319eb60496583ace9aca561c7ab",