diff --git a/src/main/java/org/zjy/learn/code/amazon/ReorderLogFiles.java b/src/main/java/org/zjy/learn/code/amazon/ReorderLogFiles.java
new file mode 100644
index 0000000..9cea684
--- /dev/null
+++ b/src/main/java/org/zjy/learn/code/amazon/ReorderLogFiles.java
@@ -0,0 +1,19 @@
+public class ReorderLogFiles {
+	public String[] reorderLogFiles(String[] logs) {
+        Arrays.sort(logs, (a, b) -> {
+            String[] split1 = a.split(" ", 2);
+            String[] split2 = b.split(" ", 2);
+            boolean isDigit1 = Character.isDigit(split1[1].charAt(0));
+            boolean isDigit2 = Character.isDigit(split2[1].charAt(0));
+            if(!isDigit1 && !isDigit2) {             
+                int comp = split1[1].compareTo(split2[1]);
+                if(comp != 0)
+                    return comp;
+                else
+                    return split1[0].compareTo(split2[0]);
+            }
+            return isDigit1 ? (isDigit2 ? 0 : 1) : -1;
+         });
+         return logs;
+    }
+}
\ No newline at end of file