diff --git "a/problems/0007.\345\271\263\345\235\207\347\273\251\347\202\271.md" "b/problems/0007.\345\271\263\345\235\207\347\273\251\347\202\271.md"
index d00a51d2a4762645a05d84e3da976b06b6603261..ad936df2d2b02003d8472e1d210bb401ff495e12 100644
--- "a/problems/0007.\345\271\263\345\235\207\347\273\251\347\202\271.md"
+++ "b/problems/0007.\345\271\263\345\235\207\347\273\251\347\202\271.md"
@@ -83,6 +83,44 @@ public class Main {
     }
 }
 ```
+### Java思路2
+```Java 
+import java.util.Scanner;
+import java.text.DecimalFormat;
+
+public class Main {
+    public static void main(String[] args) {
+        Scanner in = new Scanner(System.in);
+        while(in.hasNextLine()){
+            int sum = 0;
+            boolean flag = true;
+            String s = in.nextLine();
+            for (int i = 0; i < s.length(); i++) {
+                switch(s.charAt(i)){
+                    case ' ':
+                    case 'F': break;
+                    case 'A': sum+=4; break;
+                    case 'B': sum+=3; break;
+                    case 'C': sum+=2; break;
+                    case 'D': sum+=1; break;
+                    default : {
+                        flag=false;
+                        break;
+                    }
+                }
+                if (!flag) break; //提前结束遍历当前行
+            }
+            if (!flag) {
+                System.out.println("Unknown");
+            } else {
+                DecimalFormat df = new DecimalFormat("0.00"); 
+                int num = (s.length() + 1) / 2;  //去掉空格
+                System.out.println(df.format(1.0 * sum / num));
+            }
+        }
+    }
+}
+```
 
 ## python