更新 Solution.java

src/solution/Solution.java

@@ -112,17 +112,27 @@ public class Solution {
         int index = 0;
         StringBuilder temp = new StringBuilder();
         if (strs != null){
-            for (int i = 0; i < strs.length; i++) {
+            for (int k = 0; k < strs[0].length(); k++) {
+                char indexChar = strs[0].charAt(index);
+                for (int i = 1; i < strs.length; i++) {
                     if (strs[i] != ""){
-                    for (int j = 0; j < strs[i].length() && j < index; j++) {
-                        temp.append(strs[i].charAt(index));
-                        break;
+                        for (int j = 0; j < 1; j++) {
+                            char crrChar = strs[i].charAt(index);
+                            if (indexChar != crrChar){
+                                return String.valueOf(temp);
+                            }
+                            if (i == strs.length- 1){
+                                temp.append(crrChar);
+                                index++;
+                            }
                         }
                     } else {
                         return "";
                     }
                 }
             }
+
+        }
         return "";
     }
 }