Merge pull request #85 from Meuman/add_two_numbers_leetcode_java

Added solution for LeetCode problem 2. Add Two Numbers in Java

Author: larissalages

leetcode/java/linkedlist/2.java

@@ -0,0 +1,21 @@
+class Solution {
+    public ListNode addTwoNumbers(ListNode l1, ListNode l2) {
+        ListNode root = new ListNode();
+        ListNode currentNode = root;
+        int carry = 0;
+        while (l1 != null || l2 != null){
+            int val1 = l1 != null ? l1.val : 0;
+            int val2 = l2 != null ? l2.val : 0;
+            int sum = val1 + val2 + carry;
+            carry = sum / 10;
+            currentNode.next = new ListNode(sum % 10);
+            currentNode = currentNode.next;
+            l1 = l1 != null ? l1.next : null;
+            l2 = l2 != null ? l2.next : null;
+        }
+        if (carry == 1){
+            currentNode.next = new ListNode(carry);
+        }
+        return root.next;
+    }
+}