diff --git "a/39 \345\220\264\346\241\220/20230513 Java \351\231\244\346\263\225\345\274\202\345\270\270.md" "b/39 \345\220\264\346\241\220/20230513 Java \351\231\244\346\263\225\345\274\202\345\270\270.md"
new file mode 100644
index 0000000000000000000000000000000000000000..4378550e246c9a784315b9c96c9229bb0c5d7551
--- /dev/null
+++ "b/39 \345\220\264\346\241\220/20230513 Java \351\231\244\346\263\225\345\274\202\345\270\270.md"	
@@ -0,0 +1,28 @@
+```java
+import java.util.InputMismatchException;
+import java.util.Scanner;
+//除法算数的异常。
+public class MySum {
+    public static void main(String[] args) {
+        Scanner sc = new Scanner(System.in);
+        while (true) {
+            try {
+                System.out.println("进入除法" +
+                        "请输入a和b，用空格隔开:");
+                int a = sc.nextInt();
+                int b = sc.nextInt();
+                System.out.println("a/b=" + a / b);
+                break;
+            } catch (ArithmeticException a) {
+                System.out.println("被除数不能为零.");
+            } catch (InputMismatchException a) {
+                System.out.println("输入错误，请检查输入。");
+                sc.nextLine();
+            }
+        }
+        
+    }
+}
+
+```
+