for editor

data/1.Java初阶/1.Java概览/1.编辑Java源代码/HelloWorld.md

@@ -27,7 +27,6 @@ public class App {
 ### A
 
 ```java
-
 public class App {
     public int main(){
         System.out.printf("Hello World");
@@ -39,7 +38,6 @@ public class App {
 ### B
 
 ```java
-
 public class App {
     public static void main(String[] args){
         println("Hello World");

data/1.Java初阶/1.Java概览/2.编译Java程序/app.md

@@ -4,8 +4,7 @@
 
 ## 答案
 
-```java
-
+```shell
 javac HelloWorld.java
 ```
 
@@ -13,21 +12,18 @@ javac HelloWorld.java
 
 ### A
 
-```java
-
+```shell
 java -c HelloWorld.java
 ```
 
 ### B
 
-```java
-
+```shell
 java -c HelloWorld
 ```
 
 ### C
 
-```java
-
+```shell
 javac -c HelloWorld.java
 ```

data/1.Java初阶/1.Java概览/3.Java的运行机制/runtime.md

@@ -4,30 +4,18 @@
 
 ## 答案
 
-```java
-
 ClassLoader是JVM实现的一部分
-```
 
 ## 选项
 
 ### A
 
-```java
-
 ClassLoader是JVM实现的一部分
-```
 
 ### B
 
-```java
-
 JDK只包含JRE
-```
 
 ### C
 
-```java
-
 JVM不属于JRE
-```

data/1.Java初阶/1.Java概览/4.根据CLASSPATH环境变量定位类/classpath.md

@@ -5,7 +5,6 @@
 ## 答案
 
 ```bat
-
 %JAVA_HOME%\bin
 ```
 
@@ -14,20 +13,17 @@
 ### A
 
 ```bat
-
 %JAVA_HOME%\tools.jar
 ```
 
 ### B
 
 ```bat
-
 %JAVA_HOME%\dt.jar
 ```
 
 ### C
 
 ```bat
-
 %JAVA_HOME%\bin
 ```

data/1.Java初阶/2.Java的基本语法/1.Java的基本语法格式/config.json

 {
   "node_id": "java-efb87004230b4680a32c6584112c6f20",
   "keywords": [
-    "输出",
-    "循环",
-    "for"
+    "语法", "Hello World"
   ],
   "children": [],
   "export": [

data/1.Java初阶/2.Java的基本语法/2.Java中的注释/config.json

 {
   "node_id": "java-c668b26b90ab4982bd906933809d6049",
-  "keywords": [],
+  "keywords": ["注释 "],
   "children": [],
   "export": [
     "comment.json"

data/1.Java初阶/2.Java的基本语法/3.Java中的关键字/config.json

 {
   "node_id": "java-0021d9d14dfc429cab17b4dd912651b6",
-  "keywords": [],
+  "keywords": ["关键字"],
   "children": [],
-  "export": [],
+  "export": ["keyword.json"],
   "title": "Java中的关键字"
 }
\ No newline at end of file

data/1.Java初阶/2.Java的基本语法/3.Java中的关键字/keyword.json

+{
+  "type": "code_options",
+  "author": "刘鑫",
+  "source": "keyword.md",
+  "exercise_id": "57b6f2510fde488486f73ab8597370c6"
+}
\ No newline at end of file

data/1.Java初阶/2.Java的基本语法/4.Java中的标识符/config.json

-{
-  "node_id": "java-1d41e245176e437e8103e481bc91aa3b",
-  "keywords": [],
-  "children": [],
-  "export": [],
-  "title": "Java中的标识符"
-}
\ No newline at end of file

data/1.Java初阶/2.Java的基本语法/4.Java中的标识符/identifier.md

-# Java中的标识符
-
-下面代码中哪个不符合Java标识符的规范：
-
-```java
-
-public class App {
-    public static void main(String[] args) {
-        int 22name = 1024;
-        String _id = "1";
-        boolean $age = true;
-    }
-}
-```
-
-## 答案
-
-```java
-
-22name
-```
-## 选项
-
-### A
-
-args
-
-### B
-
-22name
-
-### C
-
-_id
-
-### D
-
-$age

data/1.Java初阶/3.Java中的变量与常量/2.变量的数据类型/config.json

 {
   "node_id": "java-ac26535850ef4aaf8bb9fec08bc47825",
-  "keywords": [],
+  "keywords": ["变量", "类型"],
   "children": [],
   "export": ["datatype.json"],
   "title": "变量的数据类型"

data/1.Java初阶/4.Java中的运算符/2.逻辑运算符/logic.md

@@ -4,7 +4,16 @@
 
 ## 答案
 
-B
+```java
+
+boolean flag1 = false;
+boolean flag2 = false;
+if (flag1 && flag2) {
+    System.out.println("1024");
+} else {
+    System.out.println("CSDN");
+}
+```
 
 ## 选项
 
@@ -25,19 +34,6 @@ if (!flag1 || flag2) {
 
 ```java
 
-boolean flag1 = false;
-boolean flag2 = false;
-if (flag1 && flag2) {
-    System.out.println("1024");
-} else {
-    System.out.println("CSDN");
-}
-```
-
-### C
-
-```java
-
 boolean flag1 = true;
 boolean flag2 = false;
 if (flag1 && flag2) {
@@ -47,6 +43,6 @@ if (flag1 && flag2) {
 }
 ```
 
-### D
+### C
 
 以上都不是

data/1.Java初阶/4.Java中的运算符/3.算术运算符/arithmetic.md

@@ -9,22 +9,18 @@ int b = a++;
 
 ## 答案
 
-A
+1
 
 ## 选项
 
 ### A
 
-1
-
-### B
-
 2
 
-### C
+### B
 
 3
 
-### D
+### C
 
 以上都不是

data/1.Java初阶/5.选择结构语句/1.if条件语句/config.json

 {
   "node_id": "java-d4a802d353d648a0a4c90daf60774cf3",
-  "keywords": [],
+  "keywords": ["条件", "控制", "分支", "if"],
   "children": [],
   "export": ["if.json"],
   "title": "if条件语句"

data/1.Java初阶/5.选择结构语句/1.if条件语句/if.json

@@ -3,5 +3,5 @@
   "author": "熊克斐",
   "source": "if.md",
   "notebook_enable": false,
-  "exercise_id": "b44161e5a27342cdbe130ca04f805a93"
+  "exercise_id": "5a0a4481fe024557830736a27f10e64d"
 }
\ No newline at end of file

data/1.Java初阶/5.选择结构语句/1.if条件语句/if.md

@@ -4,7 +4,14 @@
 
 ## 答案
 
-B
+```java
+
+int count = 0;
+if (1 == count) {
+    System.out.println("Hello World");
+} else
+    System.out.println("CSDN");
+```
 
 ## 选项
 
@@ -22,17 +29,6 @@ if (1 = count) {
 
 ```java
 
-int count = 0;
-if (1 == count) {
-    System.out.println("Hello World");
-} else
-    System.out.println("CSDN");
-```
-
-### C
-
-```java
-
 String name = "CSDN";
 if ("CSDN" != name) {
     System.out.println("CSDN");
@@ -40,6 +36,6 @@ if ("CSDN" != name) {
     System.out.println("Hello World");
 ```
 
-### D
+### C
 
 以上都不是

data/1.Java初阶/5.选择结构语句/2.switch条件语句/config.json

 {
   "node_id": "java-180cf0806d374fa4b10fdaebcc946d89",
-  "keywords": [],
+  "keywords": ["条件", "控制", "分支", "switch"],
   "children": [],
-  "export": [],
-  "title": "switch条件语句"
+  "export": ["switch.json"]
 }
\ No newline at end of file

data/1.Java初阶/5.选择结构语句/2.switch条件语句/switch.json

+{
+  "type": "code_options",
+  "author": "熊克斐",
+  "source": "switch.md",
+  "notebook_enable": false,
+  "exercise_id": "6c933ddd7fe0437e886c2dfb1332f661"
+}
\ No newline at end of file

data/1.Java初阶/5.选择结构语句/2.switch条件语句/switch.md

@@ -4,12 +4,6 @@
 
 ## 答案
 
-A
-
-## 选项
-
-### A
-
 ```java
 
 int type = 0;
@@ -25,6 +19,8 @@ switch (type) {
 }
 ```
 
+## 选项
+
 ### B
 
 ```java

data/1.Java初阶/6.循环结构语句/1.do…while循环语句/config.json → data/1.Java初阶/6.循环结构语句/1.dowhile循环/config.json

 {
   "node_id": "java-9814a131da364cd0a3933b640ddb421c",
-  "keywords": [],
+  "keywords": ["循环", "do", "while"],
   "children": [],
-  "export": ["dowhile.json"],
-  "title": "do…while循环语句"
+  "export": ["dowhile.json"]
 }
\ No newline at end of file

data/1.Java初阶/6.循环结构语句/1.do…while循环语句/dowhile.md → data/1.Java初阶/6.循环结构语句/1.dowhile循环/dowhile.md

@@ -4,14 +4,10 @@
 
 ## 答案
 
-A
+1次
 
 ## 选项
 
-### A
-
-1次
-
 ### B
 
 2次

data/1.Java初阶/6.循环结构语句/2.for循环语句/config.json

 {
   "node_id": "java-911127b38b884ab4bb5a35365c41833b",
-  "keywords": [],
+  "keywords": ["循环", "for"],
   "children": [],
-  "export": [],
+  "export": ["for.json"],
   "title": "for循环语句"
 }
\ No newline at end of file

data/1.Java初阶/6.循环结构语句/2.for循环语句/for.json

+{
+  "type": "code_options",
+  "author": "刘鑫",
+  "source": "for.md",
+  "notebook_enable": false,
+  "exercise_id": "7c96722b4a9c47629b4d3e543e70a1c5"
+}
\ No newline at end of file

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

@@ -4,7 +4,7 @@
 
 ## 答案
 
-D
+以上都是
 
 ## 选项
 
@@ -19,7 +19,3 @@ boolean addAll(Collection<? extends E> c)
 ### C
 
 boolean isEmpty()
-
-### D
-
-以上都是

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

 {
   "node_id": "java-73271e880f0843f69437427bfc557ff2",
-  "keywords": [],
+  "keywords": ["集合", "collection"],
   "children": [],
   "export": ["collection.json"],
   "title": "Collection接口"

data/1.Java初阶/7.集合/10.树集/config.json

 {
   "node_id": "java-b295e8ba38ed4e3c90ea0f7b0d70039e",
-  "keywords": [],
+  "keywords": ["集合", "树"],
   "children": [],
   "export": ["treeset.json"],
   "title": "树集"

data/1.Java初阶/7.集合/10.树集/treeset.md

@@ -4,7 +4,7 @@
 
 ## 答案
 
-B
+它不能被克隆，因为它没有实现Cloneable接口
 
 ## 选项
 
@@ -12,10 +12,6 @@ B
 
 是一个有序的集合，它的作用是提供有序的Set集合
 
-### B
-
-它不能被克隆，因为它没有实现Cloneable接口
-
 ### C
 
 继承于AbstractSet抽象类

data/1.Java初阶/7.集合/11.映射/config.json

 {
   "node_id": "java-7625240ab0254b198142c52926465f42",
-  "keywords": [],
+  "keywords": ["集合", "映射", "字典"],
   "children": [
     {
       "基本映射操作": {

data/1.Java初阶/7.集合/11.映射/map.md

@@ -4,7 +4,7 @@
 
 ## 答案
 
-D
+以上都是
 
 ## 选项
 
@@ -37,6 +37,5 @@ while (it.hasNext()) {
 }
 ```
 
-### D
 
-以上都是
+

data/1.Java初阶/7.集合/12.遗留的集合/legacy.md

@@ -4,7 +4,7 @@
 
 ## 答案
 
-D
+以上都是
 
 ## 选项
 
@@ -20,6 +20,4 @@ Vector
 
 Stack
 
-### D
 
-以上都是

data/1.Java初阶/7.集合/13.编写equals和hashCode/config.json

 {
   "node_id": "java-bb2a2b6d7b114799b01aa89bafbdab86",
-  "keywords": [],
+  "keywords": ["判等", "hash", "equals"],
   "children": [],
   "export": ["equals.json", "hashCode.json"],
   "title": "编写equals和hashCode"

data/1.Java初阶/7.集合/13.编写equals和hashCode/equals.md

@@ -4,7 +4,12 @@
 
 ## 答案
 
-B
+```java
+
+int a = 1;
+int b = 2;
+System.out.println(a.equals(b));
+```
 
 ## 选项
 
@@ -17,15 +22,6 @@ String b = "2";
 System.out.println(a.equals(b));
 ```
 
-### B
-
-```java
-
-int a = 1;
-int b = 2;
-System.out.println(a.equals(b));
-```
-
 ### C
 
 ```java

data/1.Java初阶/7.集合/13.编写equals和hashCode/hashCode.md

@@ -4,7 +4,7 @@
 
 ## 答案
 
-B
+同时覆盖hashCode()和equals()，数据就是唯一的
 
 ## 选项
 
@@ -12,9 +12,6 @@ B
 
 覆盖equals()但不覆盖hashCode()，会导致数据的不唯一
 
-### B
-
-同时覆盖hashCode()和equals()，数据就是唯一的
 
 ### C
 

data/1.Java初阶/7.集合/14.使用TreeMap/config.json

 {
   "node_id": "java-6d9ccc979da54411ac65fccd1a12071e",
-  "keywords": [],
+  "keywords": ["集合", "TreeMap", "字典"],
   "children": [],
   "export": ["treemap.json"],
   "title": "使用TreeMap"

data/1.Java初阶/7.集合/14.使用TreeMap/treemap.md

@@ -4,14 +4,10 @@
 
 ## 答案
 
-A
+ATreeMap继承于AbstractMap，实现了Map, Cloneable, NavigableMap, Serializable接口
 
 ## 选项
 
-### A
-
-TreeMap继承于AbstractMap，实现了Map, Cloneable, NavigableMap, Serializable接口
-
 ### B
 
 TreeMap允许出现重复的key

data/1.Java初阶/7.集合/15.使用Properties/config.json

 {
   "node_id": "java-7b0b78c00f934f7f958dcf7107243ae1",
-  "keywords": [],
+  "keywords": ["属性", "字典", "集合"],
   "children": [],
-  "export": [],
+  "export": ["properties.json"],
   "title": "使用Properties"
 }
\ No newline at end of file

data/1.Java初阶/7.集合/15.使用Properties/properties.json

 {
-    "type": "code_options",
-    "author": "熊克斐",
-    "source": "properties.md",
-    "exercise_id": "",
-    "notebook_enable": false
+  "type": "code_options",
+  "author": "熊克斐",
+  "source": "properties.md",
+  "notebook_enable": false,
+  "exercise_id": "e18aecbc334e44b9aba7a72abc627970"
 }
\ No newline at end of file

data/1.Java初阶/7.集合/15.使用Properties/properties.md

@@ -4,12 +4,6 @@
 
 ## 答案
 
-A
-
-## 选项
-
-### A
-
 ```java
 
 public void test() {
@@ -18,6 +12,9 @@ public void test() {
 }
 ```
 
+## 选项
+
+
 ### B
 
 ```java

data/1.Java初阶/7.集合/16.使用Deque/config.json

 {
   "node_id": "java-ff4a16d20df24eda93d843749e777a76",
-  "keywords": [],
+  "keywords": ["集合", "队列"],
   "children": [],
   "export": ["deque.json"],
   "title": "使用Deque"

data/1.Java初阶/7.集合/16.使用Deque/deque.md

@@ -4,7 +4,7 @@
 
 ## 答案
 
-D
+以上都是
 
 ## 选项
 
@@ -20,6 +20,3 @@ D
 
 可以用作堆栈
 
-### D
-
-以上都是

data/1.Java初阶/7.集合/2.List接口/config.json

 {
   "node_id": "java-c6a5d8d2c6394aae9ba504a2d2e922e8",
-  "keywords": [],
+  "keywords": ["集合", "list", "列表"],
   "children": [
     {
       "List接口简介": {
@@ -27,6 +27,6 @@
       }
     }
   ],
-  "export": [],
+  "export": ["list.json"],
   "title": "List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
+  "type": "code_options",
+  "author": "熊克斐",
+  "source": "list.md",
+  "exercise_id": "d7d1d8ac9669479bbd22b61fda84be44",
+  "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

 {
   "node_id": "java-04044ad9b1914b928a0f48be4478f9ac",
-  "keywords": [],
+  "keywords": ["集合", "迭代", "iteratable"],
   "children": [
     {
       "Iterator遍历集合": {

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

@@ -4,7 +4,7 @@
 
 ## 答案
 
-D
+以上都是
 
 ## 选项
 
@@ -40,6 +40,4 @@ for (String str : array) {
 }
 ```
 
-### D
 
-以上都是

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

 {
   "node_id": "java-243249b52e4449d1acc2f61ac3d492c4",
-  "keywords": [],
+  "keywords": ["集合", "set"],
   "children": [
     {
       "Set接口简介": {

data/1.Java初阶/7.集合/4.Set接口/set.md

@@ -4,7 +4,9 @@
 
 ## 答案
 
-C
+```java
+LinkedSet
+```
 
 ## 选项
 
@@ -22,13 +24,6 @@ HashSet
 TreeSet
 ```
 
-### C
-
-```java
-
-LinkedSet
-```
-
 ### D
 
 以上都是

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

 {
   "node_id": "java-585898e24579448980def03a33fd553c",
-  "keywords": [],
+  "keywords": ["集合", "字典", "map"],
   "children": [
     {
       "Map接口简介": {

data/1.Java初阶/7.集合/5.Map接口/map.md

@@ -4,7 +4,7 @@
 
 ## 答案
 
-D
+以上都是
 
 ## 选项
 
@@ -29,6 +29,5 @@ Hashtable不是线程安全的
 ConcurrentHashMap无法保证并发的安全性
 ```
 
-### D
 
-以上都是
+

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

@@ -4,14 +4,10 @@
 
 ## 答案
 
-A
+List和Set都是Collections的子类
 
 ## 选项
 
-### A
-
-List和Set都是Collections的子类
-
 ### B
 
 Map不是Collection的子类

data/1.Java初阶/7.集合/7.链表/config.json

 {
   "node_id": "java-bfbb4319eb60496583ace9aca561c7ab",
-  "keywords": [],
+  "keywords": ["集合", "链表"],
   "children": [],
   "export": ["linkedlist.json"],
   "title": "链表"

data/1.Java初阶/7.集合/7.链表/linkedlist.md

@@ -4,7 +4,7 @@
 
 ## 答案
 
-B
+默认会把元素添加到链表的第一个位置
 
 ## 选项
 
@@ -12,10 +12,6 @@ B
 
 LinkedList类是双向列表，列表中的每个节点都包含了对前一个和后一个元素的引用
 
-### B
-
-默认会把元素添加到链表的第一个位置
-
 ### C
 
 清空LinkedList的方法是clear()

data/1.Java初阶/7.集合/8.数组列表/arraylist.md

@@ -4,7 +4,7 @@
 
 ## 答案
 
-C
+ArrayList中的元素是有序的
 
 ## 选项
 
@@ -16,10 +16,6 @@ ArrayList底层是基于数组来实现容量大小动态变化的
 
 ArrayList的扩容机制为首先扩容为原始容量的 1.5 倍
 
-### C
-
-ArrayList中的元素是有序的
-
 ### D
 
 以上都不是

data/1.Java初阶/7.集合/8.数组列表/config.json

 {
   "node_id": "java-a8e9302bf3f34c67b6d0d1d1dd5b8e06",
-  "keywords": [],
+  "keywords": ["集合", "ArrayList"],
   "children": [],
   "export": ["arraylist.json"],
   "title": "数组列表"

data/1.Java初阶/7.集合/9.散列集/config.json

 {
   "node_id": "java-53a2b2fe37394f808059240a7a65c347",
-  "keywords": [],
+  "keywords": ["集合", "HashSet"],
   "children": [],
   "export": [],
   "title": "散列集"

data/1.Java初阶/7.集合/9.散列集/hashset.md

@@ -4,7 +4,7 @@
 
 ## 答案
 
-C
+ArrayList中的元素是有序的
 
 ## 选项
 
@@ -16,10 +16,6 @@ HashSet的无参构造函数创建一个大小为16的容器，加载因子为0.
 
 HashSet可以存储重复的元素
 
-### C
-
-ArrayList中的元素是有序的
-
 ### D
 
 以上都不是

data/1.Java初阶/8.操作符/1.算术操作符/arithmetic.md

@@ -9,14 +9,10 @@ int b = a++;
 
 ## 答案
 
-A
+1
 
 ## 选项
 
-### A
-
-1
-
 ### B
 
 2

data/1.Java初阶/8.操作符/1.算术操作符/config.json

 {
   "node_id": "java-a4cc291dc2264301a87f361de4b8d6ea",
-  "keywords": [],
+  "keywords": ["算术操作符"],
   "children": [
     {
       "一元加、减操作符": {

data/1.Java初阶/8.操作符/2.自动递增和递减/autoincrease.md

@@ -13,24 +13,26 @@ System.out.println("b = " + b);
 
 ## 答案
 
-A
-
-## 选项
-
-### A
-
+```
 a = 1
 b = 0
+```
+
+## 选项
 
 ### B
 
+```
 a = 1
 b = 1
+```
 
 ### C
 
+```
 a = 0
 b = 1
+```
 
 ### D
 

data/1.Java初阶/8.操作符/2.自动递增和递减/config.json

 {
   "node_id": "java-f6e6b9e930ef46699788339fc7322f18",
-  "keywords": [],
+  "keywords": ["递增", "递减"],
   "children": [],
   "export": ["autoincrease.json"],
   "title": "自动递增和递减"

data/1.Java初阶/8.操作符/3.关系操作符/config.json

 {
   "node_id": "java-21247e52fb0849699959f78321bc855e",
-  "keywords": [],
+  "keywords": ["关系运算"],
   "children": [
     {
       "测试对象的等价性": {

data/1.Java初阶/8.操作符/4.逻辑操作符/config.json

 {
   "node_id": "java-a7a6076a60e140f18b63b6ea3574eed2",
-  "keywords": [],
+  "keywords": ["逻辑", "布尔", "bool", "boolean"],
   "children": [
     {
       "短路": {

data/1.Java初阶/8.操作符/4.逻辑操作符/logic.md

@@ -4,7 +4,16 @@
 
 ## 答案
 
-B
+```java
+
+boolean flag1 = false;
+boolean flag2 = false;
+if (flag1 && flag2) {
+    System.out.println("1024");
+} else {
+    System.out.println("CSDN");
+}
+```
 
 ## 选项
 
@@ -21,19 +30,6 @@ if (!flag1 || flag2) {
 }
 ```
 
-### B
-
-```java
-
-boolean flag1 = false;
-boolean flag2 = false;
-if (flag1 && flag2) {
-    System.out.println("1024");
-} else {
-    System.out.println("CSDN");
-}
-```
-
 ### C
 
 ```java

data/1.Java初阶/8.操作符/5.按位操作符/bit.json

 {
-    "type": "code_options",
-    "author": "熊克斐",
-    "source": "bit.md",
-    "exercise_id": "",
-    "notebook_enable": false
+  "type": "code_options",
+  "author": "熊克斐",
+  "source": "bit.md",
+  "notebook_enable": false,
+  "exercise_id": "84395adb6bd34485a58b388ab28ec315"
 }
\ No newline at end of file

data/1.Java初阶/8.操作符/5.按位操作符/bit.md

@@ -10,7 +10,7 @@ System.out.println(1 | 2);
 
 ## 答案
 
-D
+以上都不是
 
 ## 选项
 
@@ -29,6 +29,3 @@ D
 2
 2
 
-### D
-
-以上都不是

data/1.Java初阶/8.操作符/5.按位操作符/config.json

 {
   "node_id": "java-58320af2f24648198eda32c4da587b5d",
-  "keywords": [],
+  "keywords": ["位运算", "bit", "比特"],
   "children": [],
-  "export": [],
+  "export": ["bit.json"],
   "title": "按位操作符"
 }
\ No newline at end of file

data/1.Java初阶/8.操作符/6.移位操作符/config.json

 {
   "node_id": "java-0d405a41281d424ca00dca4e18c12b61",
-  "keywords": [],
+  "keywords": ["位运算", "左移", "右移"],
   "children": [],
-  "export": [],
+  "export": ["move.json"],
   "title": "移位操作符"
 }
\ No newline at end of file

data/1.Java初阶/8.操作符/6.移位操作符/move.json

 {
-    "type": "code_options",
-    "author": "熊克斐",
-    "source": "move.md",
-    "exercise_id": "",
-    "notebook_enable": false
+  "type": "code_options",
+  "author": "熊克斐",
+  "source": "move.md",
+  "exercise_id": "5eb1972ea2cd427781cc5f0162552186",
+  "notebook_enable": false
 }
\ No newline at end of file

data/1.Java初阶/8.操作符/6.移位操作符/move.md

@@ -11,24 +11,26 @@ System.out.println(c >> d);
 
 ## 答案
 
-A
-
-## 选项
-
-### A
-
+```
 8
 0
+```
+
+## 选项
 
 ### B
 
+```
 16
 -1
+```
 
 ### C
 
+```
 2
 2
+```
 
 ### D
 

data/1.Java初阶/8.操作符/7.三元操作符if-else/config.json

 {
   "node_id": "java-27584561349847fa84c7905215131621",
-  "keywords": [],
+  "keywords": ["逻辑", "三元运算符"],
   "children": [],
   "export": ["three.json"],
   "title": "三元操作符if-else"

data/1.Java初阶/8.操作符/7.三元操作符if-else/three.md

@@ -11,7 +11,7 @@ System.out.println(a == b ? 0 : 1);
 
 ## 答案
 
-B
+1
 
 ## 选项
 
@@ -19,10 +19,6 @@ B
 
 10
 
-### B
-
-1
-
 ### C
 
 20

data/1.Java初阶/8.操作符/8.字符串操作符 + 和 +=/String.md

@@ -3,7 +3,6 @@
 下面代码执行后的结果是：
 
 ```java
-
 String s1 = "1";
 int s2 = 2;
 System.out.println(s1 + s2);
@@ -11,7 +10,7 @@ System.out.println(s1 + s2);
 
 ## 答案
 
-C
+12
 
 ## 选项
 
@@ -25,8 +24,5 @@ C
 
 ### C
 
-12
-
-### D
 
 以上都不是

data/1.Java初阶/8.操作符/8.字符串操作符 + 和 +=/config.json

 {
   "node_id": "java-8fad68e2479a4e93875c6ca1746baef6",
-  "keywords": [],
+  "keywords": ["字符串"],
   "children": [],
   "export": ["String.json"],
   "title": "字符串操作符 + 和 +="

data/1.Java初阶/8.操作符/9.类型转换操作符/config.json

-{
-  "node_id": "java-b075138ebd0145338459d7a9de46aef7",
-  "keywords": [],
-  "children": [
-    {
-      "截尾和舍入": {
-        "keywords": [],
-        "children": [],
-        "node_id": "java-805d92324ad14bf48a50084d9af74a8c",
-        "title": "截尾和舍入"
-      }
-    },
-    {
-      "提升": {
-        "keywords": [],
-        "children": [],
-        "node_id": "569d5e11c4fc5de7844053d9a733c5e8",
-        "title": "提升"
-      }
-    }
-  ],
-  "export": [],
-  "title": "类型转换操作符"
-}
\ No newline at end of file

data/1.Java初阶/9.控制执行流程/1.if-else/config.json

 {
   "node_id": "java-85a126a6ba39488aaabd2d4015353175",
-  "keywords": [],
+  "keywords": ["流程控制", "if", "else"],
   "children": [],
   "export": [],
   "title": "if-else"

data/1.Java初阶/9.控制执行流程/2.for/config.json

 {
   "node_id": "java-722dc1cccbc74369b9bff5ac580bc649",
-  "keywords": [],
+  "keywords": ["流程控制", "for", "循环", "foreach"],
   "children": [],
   "export": [
     "for.json",

data/1.Java初阶/9.控制执行流程/3.switch/config.json

 {
   "node_id": "java-05144fa9daf94a64ad0667eab1d6cc9a",
-  "keywords": [],
+  "keywords": ["流程控制", "switch"],
   "children": [],
   "export": ["switch.json"],
   "title": "switch"

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

 {
   "node_id": "java-d11b7f01004c443ea6226d174ba1e3fa",
-  "keywords": [],
+  "keywords": ["异常", "错误", "try", "catch", "finally"],
   "children": [
     {
       "概念": {

data/1.Java初阶/9.控制执行流程/5.函数/call.json

+{
+  "type": "code_options",
+  "author": "刘鑫",
+  "source": "call.md",
+  "notebook_enable": false,
+  "exercise_id": "6e8215c3d78746279787c02cd6b40db4"
+}
\ No newline at end of file

data/1.Java初阶/9.控制执行流程/5.函数/call.md

+# tampline 调用
+
+我们需要编写一个函数，对浮点数进行sigmod计算，即 `f(x)=1/(1+e^(-x))`，下列函数实现正确的是：
+
+## 答案
+
+```java
+import math.Math;
+
+public class Util{
+    public float sigmod(float x){
+        return 1/(1+Math.exp(-x));
+    }
+}
+```
+
+## 选项
+
+### 没有 return
+
+```java
+import math.Math;
+
+public class Util{
+    public float sigmod(float x){
+        1/(1+Math.exp(-x));
+    }
+}
+```
+
+### 错误的结果返回方式
+
+```java
+import math.Math;
+
+public class Util{
+    public void sigmod(float x, float result){
+        result = 1/(1+Math.exp(-x));
+    }
+}
+```
+
+### 结构定义错误
+
+```java
+import math.Math;
+
+public class Util{
+    public sigmod(float x) -> float{
+        return 1/(1+Math.exp(-x));
+    }
+}
+```
+
+### 结构定义错误
+
+```java
+import math.Math;
+
+public class Util{
+    public sigmod(float x):float = {
+        return 1/(1+Math.exp(-x));
+    }
+}
+```
+
+### 结构定义错误
+
+```java
+import math.Math;
+
+public class Util{
+    public sigmod(float x) returns float {
+        return 1/(1+Math.exp(-x));
+    }
+}
+```
+
+### 结构定义错误
+
+```java
+import math.Math;
+
+public class Util{
+    public sigmod(float x):float {
+        return 1/(1+Math.exp(-x));
+    }
+}
+```
+

data/1.Java初阶/9.控制执行流程/5.函数/config.json

 {
   "node_id": "java-f2482f12e0634885bdf6701a5a802c77",
-  "keywords": [],
+  "keywords": ["函数", "function"],
   "children": [],
-  "export": ["try.json"]
+  "export": ["call.json", "parser.json"]
 }
\ No newline at end of file

data/1.Java初阶/9.控制执行流程/5.函数/try.json → data/1.Java初阶/9.控制执行流程/5.函数/parser.json

 {
   "type": "code_options",
   "author": "刘鑫",
-  "source": "try.md",
+  "source": "parser.md",
   "exercise_id": "6d8116aa4c254e808bc1c2aa33afdd4f",
   "notebook_enable": false
 }
\ No newline at end of file

data/1.Java初阶/9.控制执行流程/5.函数/try.md → data/1.Java初阶/9.控制执行流程/5.函数/parser.md

-# Try 封装
+# Parser 函数
 
 我们的项目中有一个预备好的 `Try<T>` 类型，它可以携带正常对象或异常，只需要调用对应的静态方法
 `Try.success(T result)` 或者 `Try.failure(Throwable err)` 即可。

data/3.Java高阶/1.行为抽象和Lambda/3.流/config.json

@@ -2,6 +2,6 @@
   "node_id": "java-9f8b0da343fd415c9b29380647b0f1f8",
   "keywords": [],
   "children": [],
-  "export": [],
+  "export": ["map_reduce.json"],
   "title": "流简介"
 }
\ No newline at end of file

data/3.Java高阶/1.行为抽象和Lambda/3.流/map_reduce.json

@@ -2,5 +2,6 @@
   "type": "code_options",
   "author": "刘鑫",
   "source": "map_reduce.md",
-  "notebook_enable": true
+  "notebook_enable": true,
+  "exercise_id": "76508072bc98405287653b9827f86424"
 }
\ No newline at end of file

data/tree.json

@@ -57,9 +57,8 @@
                     "Java的基本语法格式": {
                       "node_id": "java-efb87004230b4680a32c6584112c6f20",
                       "keywords": [
-                        "输出",
-                        "循环",
-                        "for"
+                        "语法",
+                        "Hello World"
                       ],
                       "children": []
                     }
@@ -67,21 +66,18 @@
                   {
                     "Java中的注释": {
                       "node_id": "java-c668b26b90ab4982bd906933809d6049",
-                      "keywords": [],
+                      "keywords": [
+                        "注释 "
+                      ],
                       "children": []
                     }
                   },
                   {
                     "Java中的关键字": {
                       "node_id": "java-0021d9d14dfc429cab17b4dd912651b6",
-                      "keywords": [],
-                      "children": []
-                    }
-                  },
-                  {
-                    "Java中的标识符": {
-                      "node_id": "java-1d41e245176e437e8103e481bc91aa3b",
-                      "keywords": [],
+                      "keywords": [
+                        "关键字"
+                      ],
                       "children": []
                     }
                   }
@@ -107,7 +103,10 @@
                   {
                     "变量的数据类型": {
                       "node_id": "java-ac26535850ef4aaf8bb9fec08bc47825",
-                      "keywords": [],
+                      "keywords": [
+                        "变量",
+                        "类型"
+                      ],
                       "children": []
                     }
                   },
@@ -187,14 +186,24 @@
                   {
                     "if条件语句": {
                       "node_id": "java-d4a802d353d648a0a4c90daf60774cf3",
-                      "keywords": [],
+                      "keywords": [
+                        "条件",
+                        "控制",
+                        "分支",
+                        "if"
+                      ],
                       "children": []
                     }
                   },
                   {
                     "switch条件语句": {
                       "node_id": "java-180cf0806d374fa4b10fdaebcc946d89",
-                      "keywords": [],
+                      "keywords": [
+                        "条件",
+                        "控制",
+                        "分支",
+                        "switch"
+                      ],
                       "children": []
                     }
                   }
@@ -207,16 +216,23 @@
                 "keywords": [],
                 "children": [
                   {
-                    "do…while循环语句": {
+                    "dowhile循环": {
                       "node_id": "java-9814a131da364cd0a3933b640ddb421c",
-                      "keywords": [],
+                      "keywords": [
+                        "循环",
+                        "do",
+                        "while"
+                      ],
                       "children": []
                     }
                   },
                   {
                     "for循环语句": {
                       "node_id": "java-911127b38b884ab4bb5a35365c41833b",
-                      "keywords": [],
+                      "keywords": [
+                        "循环",
+                        "for"
+                      ],
                       "children": []
                     }
                   }
@@ -231,14 +247,21 @@
                   {
                     "Collection接口": {
                       "node_id": "java-73271e880f0843f69437427bfc557ff2",
-                      "keywords": [],
+                      "keywords": [
+                        "集合",
+                        "collection"
+                      ],
                       "children": []
                     }
                   },
                   {
                     "List接口": {
                       "node_id": "java-c6a5d8d2c6394aae9ba504a2d2e922e8",
-                      "keywords": [],
+                      "keywords": [
+                        "集合",
+                        "list",
+                        "列表"
+                      ],
                       "children": [
                         {
                           "List接口简介": {
@@ -270,7 +293,11 @@
                   {
                     "Collection集合遍历": {
                       "node_id": "java-04044ad9b1914b928a0f48be4478f9ac",
-                      "keywords": [],
+                      "keywords": [
+                        "集合",
+                        "迭代",
+                        "iteratable"
+                      ],
                       "children": [
                         {
                           "Iterator遍历集合": {
@@ -302,7 +329,10 @@
                   {
                     "Set接口": {
                       "node_id": "java-243249b52e4449d1acc2f61ac3d492c4",
-                      "keywords": [],
+                      "keywords": [
+                        "集合",
+                        "set"
+                      ],
                       "children": [
                         {
                           "Set接口简介": {
@@ -334,7 +364,11 @@
                   {
                     "Map接口": {
                       "node_id": "java-585898e24579448980def03a33fd553c",
-                      "keywords": [],
+                      "keywords": [
+                        "集合",
+                        "字典",
+                        "map"
+                      ],
                       "children": [
                         {
                           "Map接口简介": {
@@ -404,35 +438,51 @@
                   {
                     "链表": {
                       "node_id": "java-bfbb4319eb60496583ace9aca561c7ab",
-                      "keywords": [],
+                      "keywords": [
+                        "集合",
+                        "链表"
+                      ],
                       "children": []
                     }
                   },
                   {
                     "数组列表": {
                       "node_id": "java-a8e9302bf3f34c67b6d0d1d1dd5b8e06",
-                      "keywords": [],
+                      "keywords": [
+                        "集合",
+                        "ArrayList"
+                      ],
                       "children": []
                     }
                   },
                   {
                     "散列集": {
                       "node_id": "java-53a2b2fe37394f808059240a7a65c347",
-                      "keywords": [],
+                      "keywords": [
+                        "集合",
+                        "HashSet"
+                      ],
                       "children": []
                     }
                   },
                   {
                     "树集": {
                       "node_id": "java-b295e8ba38ed4e3c90ea0f7b0d70039e",
-                      "keywords": [],
+                      "keywords": [
+                        "集合",
+                        "树"
+                      ],
                       "children": []
                     }
                   },
                   {
                     "映射": {
                       "node_id": "java-7625240ab0254b198142c52926465f42",
-                      "keywords": [],
+                      "keywords": [
+                        "集合",
+                        "映射",
+                        "字典"
+                      ],
                       "children": [
                         {
                           "基本映射操作": {
@@ -524,28 +574,43 @@
                   {
                     "编写equals和hashCode": {
                       "node_id": "java-bb2a2b6d7b114799b01aa89bafbdab86",
-                      "keywords": [],
+                      "keywords": [
+                        "判等",
+                        "hash",
+                        "equals"
+                      ],
                       "children": []
                     }
                   },
                   {
                     "使用TreeMap": {
                       "node_id": "java-6d9ccc979da54411ac65fccd1a12071e",
-                      "keywords": [],
+                      "keywords": [
+                        "集合",
+                        "TreeMap",
+                        "字典"
+                      ],
                       "children": []
                     }
                   },
                   {
                     "使用Properties": {
                       "node_id": "java-7b0b78c00f934f7f958dcf7107243ae1",
-                      "keywords": [],
+                      "keywords": [
+                        "属性",
+                        "字典",
+                        "集合"
+                      ],
                       "children": []
                     }
                   },
                   {
                     "使用Deque": {
                       "node_id": "java-ff4a16d20df24eda93d843749e777a76",
-                      "keywords": [],
+                      "keywords": [
+                        "集合",
+                        "队列"
+                      ],
                       "children": []
                     }
                   }
@@ -560,7 +625,9 @@
                   {
                     "算术操作符": {
                       "node_id": "java-a4cc291dc2264301a87f361de4b8d6ea",
-                      "keywords": [],
+                      "keywords": [
+                        "算术操作符"
+                      ],
                       "children": [
                         {
                           "一元加、减操作符": {
@@ -576,14 +643,19 @@
                   {
                     "自动递增和递减": {
                       "node_id": "java-f6e6b9e930ef46699788339fc7322f18",
-                      "keywords": [],
+                      "keywords": [
+                        "递增",
+                        "递减"
+                      ],
                       "children": []
                     }
                   },
                   {
                     "关系操作符": {
                       "node_id": "java-21247e52fb0849699959f78321bc855e",
-                      "keywords": [],
+                      "keywords": [
+                        "关系运算"
+                      ],
                       "children": [
                         {
                           "测试对象的等价性": {
@@ -599,7 +671,12 @@
                   {
                     "逻辑操作符": {
                       "node_id": "java-a7a6076a60e140f18b63b6ea3574eed2",
-                      "keywords": [],
+                      "keywords": [
+                        "逻辑",
+                        "布尔",
+                        "bool",
+                        "boolean"
+                      ],
                       "children": [
                         {
                           "短路": {
@@ -615,54 +692,43 @@
                   {
                     "按位操作符": {
                       "node_id": "java-58320af2f24648198eda32c4da587b5d",
-                      "keywords": [],
+                      "keywords": [
+                        "位运算",
+                        "bit",
+                        "比特"
+                      ],
                       "children": []
                     }
                   },
                   {
                     "移位操作符": {
                       "node_id": "java-0d405a41281d424ca00dca4e18c12b61",
-                      "keywords": [],
+                      "keywords": [
+                        "位运算",
+                        "左移",
+                        "右移"
+                      ],
                       "children": []
                     }
                   },
                   {
                     "三元操作符if-else": {
                       "node_id": "java-27584561349847fa84c7905215131621",
-                      "keywords": [],
+                      "keywords": [
+                        "逻辑",
+                        "三元运算符"
+                      ],
                       "children": []
                     }
                   },
                   {
                     "字符串操作符 + 和 +=": {
                       "node_id": "java-8fad68e2479a4e93875c6ca1746baef6",
-                      "keywords": [],
+                      "keywords": [
+                        "字符串"
+                      ],
                       "children": []
                     }
-                  },
-                  {
-                    "类型转换操作符": {
-                      "node_id": "java-b075138ebd0145338459d7a9de46aef7",
-                      "keywords": [],
-                      "children": [
-                        {
-                          "截尾和舍入": {
-                            "keywords": [],
-                            "children": [],
-                            "node_id": "java-805d92324ad14bf48a50084d9af74a8c",
-                            "title": "截尾和舍入"
-                          }
-                        },
-                        {
-                          "提升": {
-                            "keywords": [],
-                            "children": [],
-                            "node_id": "569d5e11c4fc5de7844053d9a733c5e8",
-                            "title": "提升"
-                          }
-                        }
-                      ]
-                    }
                   }
                 ]
               }
@@ -675,28 +741,46 @@
                   {
                     "if-else": {
                       "node_id": "java-85a126a6ba39488aaabd2d4015353175",
-                      "keywords": [],
+                      "keywords": [
+                        "流程控制",
+                        "if",
+                        "else"
+                      ],
                       "children": []
                     }
                   },
                   {
                     "for": {
                       "node_id": "java-722dc1cccbc74369b9bff5ac580bc649",
-                      "keywords": [],
+                      "keywords": [
+                        "流程控制",
+                        "for",
+                        "循环",
+                        "foreach"
+                      ],
                       "children": []
                     }
                   },
                   {
                     "switch": {
                       "node_id": "java-05144fa9daf94a64ad0667eab1d6cc9a",
-                      "keywords": [],
+                      "keywords": [
+                        "流程控制",
+                        "switch"
+                      ],
                       "children": []
                     }
                   },
                   {
                     "通过异常处理错误": {
                       "node_id": "java-d11b7f01004c443ea6226d174ba1e3fa",
-                      "keywords": [],
+                      "keywords": [
+                        "异常",
+                        "错误",
+                        "try",
+                        "catch",
+                        "finally"
+                      ],
                       "children": [
                         {
                           "概念": {
@@ -916,7 +1000,10 @@
                   {
                     "函数": {
                       "node_id": "java-f2482f12e0634885bdf6701a5a802c77",
-                      "keywords": [],
+                      "keywords": [
+                        "函数",
+                        "function"
+                      ],
                       "children": []
                     }
                   }