Update 9. Palindrome Number.java

better solution for reference

Author: futurus

9. Palindrome Number.java

@@ -16,3 +16,16 @@ public boolean isPalindrome(int x) {
         }
     }
 }
+
+
+// for ref: https://discuss.leetcode.com/topic/8090/9-line-accepted-java-code-without-the-need-of-handling-overflow
+
+public boolean isPalindrome(int x) {
+    if (x<0 || (x!=0 && x%10==0)) return false;
+    int rev = 0;
+    while (x>rev){
+    	rev = rev*10 + x%10;
+    	x = x/10;
+    }
+    return (x==rev || x==rev/10);
+}