diff --git "a/41 \345\221\250\344\272\232\350\276\211/20221127java\345\217\230\351\207\217.md" "b/41 \345\221\250\344\272\232\350\276\211/20221127java\345\217\230\351\207\217.md"
deleted file mode 100644
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--- "a/41 \345\221\250\344\272\232\350\276\211/20221127java\345\217\230\351\207\217.md"	
+++ /dev/null
@@ -1,65 +0,0 @@
-# java
-
-## 变量
-
-1.字符
-
-```java
-  char sex='男'；
-```
-
-
-
-2.整数
-
-```java
-byte short int[默认] long
-```
-
-
-
-3.小数
-
-```java
- float double{默认}
-```
-
-
-
-4.字符串
-
-```java
-string
-```
-
-
-
-5.布尔
-
-```java
-boolean
-```
-
-
-
-## 作业
-
-```java
-package com.mxdx;
-
-public class noah {
-    public static void main(String[] args) {
-        String name="正常人";
-        char sex='五';
-        System.out.println("海绵宝宝不是"+name);
-        System.out.println("他有"+sex+"个好朋友");
-    }
-}
-
-```
-
-
-
-
-
- 
\ No newline at end of file
diff --git "a/41 \345\221\250\344\272\232\350\276\211/20221129java\346\211\253\346\217\217\345\231\250.md" "b/41 \345\221\250\344\272\232\350\276\211/20221129java\346\211\253\346\217\217\345\231\250.md"
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index 0000000000000000000000000000000000000000..1518f9d212ae34e04708e0e3687524eb2de8d993
--- /dev/null
+++ "b/41 \345\221\250\344\272\232\350\276\211/20221129java\346\211\253\346\217\217\345\231\250.md"	
@@ -0,0 +1,83 @@
+# java
+
+### 1.创建扫描器
+
+```java
+Scanner sc=new Scanner(System.in)
+```
+
+### 2.创建变量
+
+```java
+String name=sc.next()
+    double xiaoshu=sc.nextdouble()
+    int number=sc.nextint()
+```
+
+###  3.运算符
+
+```java
++  -  *  /  %
+```
+
+### 4.字符串相关
+
+```java
+public class lx {
+    public static void main(String[] args) {
+        int a=3,b=4,c=5;
+        System.out.println(a+b+c);//值为12
+        System.out.println(""+a+b+c);//值为345
+    }
+}
+
+```
+
+### 作业1
+
+```java
+import java.util.Scanner;
+
+public class a1 {
+    public static void main(String[] args) {
+        Scanner sc=new Scanner(System.in);
+        System.out.println("请输入一个四位数字:");
+        int number= sc.nextInt();
+        int ge=number%10;
+        int shi=number/10%10;
+        int bai=number/100%10;
+        int qian=number/1000;
+        System.out.println("个位数:"+ge);
+        System.out.println("十位数:"+shi);
+        System.out.println("百位数:"+bai);
+        System.out.println("千位数:"+qian);
+    }
+}
+
+```
+
+### 作业2
+
+```java
+import java.util.Scanner;
+
+public class a2 {
+    public static void main(String[] args) {
+        Scanner sc=new Scanner(System.in);
+        System.out.println("请输入摄氏度：");
+        double she= sc.nextDouble();
+        double E=she*9/5+32;
+        System.out.println("华氏度为"+E);
+        System.out.println("请输入华氏度");
+        double hua= sc.nextDouble();
+        double F=(hua-32)*5/9;
+        System.out.println("摄氏度为"+F);
+
+    }
+}
+
+
+```
+
+
+