diff --git a/javalang/tokenizer.py b/javalang/tokenizer.py
index d725292..869cfcc 100644
--- a/javalang/tokenizer.py
+++ b/javalang/tokenizer.py
@@ -367,7 +367,9 @@ def read_octal_integer(self):
         self.read_digits('01234567')
 
     def read_integer_or_float(self, c, c_next):
-        if c == '0' and c_next in 'xX':
+        if c_next is None:
+            return self.read_decimal_float_or_integer()
+        elif c == '0' and c_next in 'xX':
             return self.read_hex_integer_or_float()
         elif c == '0' and c_next in 'bB':
             self.read_bin_integer()