Hi, Could anyone please tell me the reason of getting an output as: ab for the following RegExp code using Relcutant quantifier?

    Pattern p = Pattern.compile("abc*?");
    Matcher m = p.matcher("abcfoo");
while(m.find())
   System.out.println(m.group()); // ab

and getting empty indices for the following code?

   Pattern p = Pattern.compile(".*?");
   Matcher m = p.matcher("abcfoo");
   while(m.find())
   System.out.println(m.group());