added solution of Palindrome Number in Java (Tahanima#49)

Author: FahimFBA

Algorithms/Easy/9_PalindromeNumber/Solution.java

@@ -0,0 +1,20 @@
+class Solution {
+    public boolean isPalindrome(int x) {
+        if (x < 0)
+            return false;
+
+        int reversedInteger = 0, lastDigit, temp;
+        temp = x; // storing the original number to a temporary variable
+        // Reversing the number
+        while (temp != 0) {
+            lastDigit = temp % 10;
+            reversedInteger = reversedInteger * 10 + lastDigit;
+            temp = temp / 10;
+        }
+        // checking if palindrome or not using condition
+        if (reversedInteger == x)
+            return true;
+        else
+            return false;
+    }
+}