diff --git "a/20 \347\237\263\350\211\257\346\266\233/20221207 \346\225\260\347\273\204\344\275\234\344\270\232.md" "b/20 \347\237\263\350\211\257\346\266\233/20221207 \346\225\260\347\273\204\344\275\234\344\270\232.md"
new file mode 100644
index 0000000000000000000000000000000000000000..8d8a46e6348f3be8a9491ac9aa29a8d80773e496
--- /dev/null
+++ "b/20 \347\237\263\350\211\257\346\266\233/20221207 \346\225\260\347\273\204\344\275\234\344\270\232.md"	
@@ -0,0 +1,36 @@
+# 数组作业
+
+```java
+import java.util.Scanner;
+
+public class A8 {
+    
+
+//需求：定义一个可以存储5个元素的int数组，数据来自于键盘录入，最后遍历数组，把元素输出在控制台
+//分析：
+//① 数组长度可知，元素未知，采用动态初始化
+//② 键盘录入，使用Scanner实现
+public class D1 {
+
+    public static void main(String[] args) {
+        Scanner sce=new Scanner(System.in);
+        System.out.println("请输入第一个整数：");
+        int one = sce.nextInt();
+        System.out.println("请输入第二个整数：");
+        int two = sce.nextInt();
+        System.out.println("请输入第三个整数：");
+        int three = sce.nextInt();
+        System.out.println("请输入第四个整数：");
+        int four = sce.nextInt();
+        System.out.println("请输入第五个整数：");
+        int five = sce.nextInt();
+
+        int[]arr={one,two,three,four,five};
+        for (int i=0;i<5;i++){
+            System.out.println("你输入的数字分别是："+arr[i]);
+        }
+    }
+}
+    
+}
+```
diff --git "a/20 \347\237\263\350\211\257\346\266\233/20221209 \351\232\217\346\234\272\346\225\260\347\273\204\344\275\234\344\270\232.md" "b/20 \347\237\263\350\211\257\346\266\233/20221209 \351\232\217\346\234\272\346\225\260\347\273\204\344\275\234\344\270\232.md"
new file mode 100644
index 0000000000000000000000000000000000000000..7eaf6749aa375c003b6fcc29fd8ecaa9559d9228
--- /dev/null
+++ "b/20 \347\237\263\350\211\257\346\266\233/20221209 \351\232\217\346\234\272\346\225\260\347\273\204\344\275\234\344\270\232.md"	
@@ -0,0 +1,44 @@
+### 作业
+
+作业1
+
+```java
+    import java.util.Random;
+    
+    public class A9 {
+            public static void main(String[] args) {
+                int[] arr = {1, 2, 3, 4, 5, 6, 7, 8, 9};
+                Random r = new Random();
+                for (int i = 0; i < arr.length; i++) {
+                    int randomIndex = r.nextInt(arr.length);
+                    int temp = arr[i];
+                    arr[i] = arr[randomIndex];
+                    arr[randomIndex] = temp;
+                }
+                for (int i = 0; i < arr.length; i++) {
+                    System.out.print(arr[i] + " ");
+                }
+            }
+        }
+```
+
+作业2
+
+```java
+    import java.util.Scanner;
+    
+    public class A10 {
+            public static void main(String[] args) {
+                System.out.println("输入五个整数");
+                Scanner str = new Scanner(System.in);
+                String a = str.nextLine();
+                String [] b=new String[1];
+                b[0]=a;
+                for (int i=0;i< b.length;i++){
+                    System.err.println(b[i]);
+                }
+            }
+        }
+```
+
+