update

java/sum/SumDoubleHex.java

@@ -0,0 +1,45 @@
+package sum;
+
+/**
+ * @author Nikita Doschennikov (me@fymio.us)
+ */
+public class SumDoubleHex {
+
+    public static void main(String[] args) {
+        double res = 0;
+        for (String arg : args) {
+            StringBuilder builder = new StringBuilder();
+            boolean containsDot = false;
+            for (char c : arg.toCharArray()) {
+                if (!Character.isWhitespace(c)) {
+                    builder.append(c);
+                    if (c == '.') {
+                        containsDot = true;
+                    }
+                } else {
+                    res += compute(builder.toString(), containsDot);
+                    containsDot = false;
+                    builder = new StringBuilder();
+                }
+            }
+            res += compute(builder.toString(), containsDot);
+        }
+        System.out.println(res);
+    }
+
+    static double compute(String num, boolean containsDot) {
+        double res = 0;
+        if (num.isEmpty()) {
+            res += 0;
+        } else if (
+            num.charAt(0) == '0' &&
+            (num.charAt(1) == 'x' || num.charAt(1) == 'X')
+        ) {
+            res += (containsDot) ? Double.parseDouble(num) : Long.decode(num);
+        } else {
+            res += Double.parseDouble(num);
+        }
+
+        return res;
+    }
+}