public static void main(String[] args) {
    String string = "Java  C++ C#";
    String[] str;
    int c=0;
    str = string.split(" ");
    for(String s:str){
        if(s.equals(" "))
            System.out.println("skipped space");
        else{
            System.out.println("--"+s);
            c++;
        }
    }
    System.out.println("words; " + c);
}

--Java
skipped space
--C++
--C#

--Java
--
--C++
--C#
words; 4

str = string.split(" +");

//more sophisticated
str = string.split("\s+");

if (s.equals("")) {
...

--Java
skipped space
--C++
--C#