diff --git a/Maths/Armstrong/Armstrong.java b/Maths/Armstrong/Armstrong.java
new file mode 100644
index 0000000..7ef9d31
--- /dev/null
+++ b/Maths/Armstrong/Armstrong.java
@@ -0,0 +1,20 @@
+public class AverageList {
+  public static void main(String[] args) {
+    System.out.println(isArmStrong(370));
+  }
+
+  private static boolean isArmStrong(int n) {
+    int temp = n;
+    int rem = 0;
+    int sum = 0;
+    System.out.println(temp);
+
+    while (n != 0) {
+      rem = n % 10;
+      sum += rem * rem * rem;
+      n = n / 10;
+    }
+
+    return sum == temp;
+  }
+}
diff --git a/Maths/Armstrong/README.md b/Maths/Armstrong/README.md
new file mode 100644
index 0000000..146906b
--- /dev/null
+++ b/Maths/Armstrong/README.md
@@ -0,0 +1,38 @@
+# Armstrong
+
+**What is Armstrong?**
+
+An armstrong number is a number which equal to the sum of the cubes of its individual digits.
+
+**Explanation**
+
+`370` is an Armstrong number because `3*3*3 + 7*7*7 + 0*0*0 = 370`.
+
+**Example**
+
+Write a function to checks whether a given number is an armstrong number or not.
+
+**Java**
+
+```js
+public class AverageList {
+  public static void main(String[] args) {
+    System.out.println(isArmStrong(370));
+  }
+
+  private static boolean isArmStrong(int n) {
+    int temp = n;
+    int rem = 0;
+    int sum = 0;
+    System.out.println(temp);
+
+    while (n != 0) {
+      rem = n % 10;
+      sum += rem * rem * rem;
+      n = n / 10;
+    }
+
+    return sum == temp;
+  }
+}
+```
diff --git a/Strings/AllCharactersSame/AllCharactersSame.java b/Strings/AllCharactersSame/AllCharactersSame.java
index 2727993..92ef83f 100644
--- a/Strings/AllCharactersSame/AllCharactersSame.java
+++ b/Strings/AllCharactersSame/AllCharactersSame.java
@@ -1,5 +1,4 @@
 public class AllCharactersSame {
-
   public static void main(String[] args) {
     System.out.println(isAllCharactersSame(""));
     System.out.println(!isAllCharactersSame("aab"));