How to split a string with space being the delimiter using Scanner

I am trying to split the input sentence based on space between the words. It is not working as expected.

public static void main(String[] args) {
    Scanner scaninput=new Scanner(System.in);
    String inputSentence = scaninput.next();
    String[] result=inputSentence.split("-");
    // for(String iter:result) {
    //     System.out.println("iter:"+iter);
    // }
    System.out.println("result.length: "+result.length);
    for (int count=0;count<result.length;count++) {
        System.out.println("==");
        System.out.println(result[count]);
    }
}

It gives the output below when I use "-" in split:

fsfdsfsd-second-third
result.length: 3
==
fsfdsfsd
==
second
==
third

When I replace "-" with space " ", it gives the below output.

first second third
result.length: 1
==
first

Any suggestions as to what is the problem here? I have already referred to the stackoverflow post How to split a String by space, but it does not work.

Using split("\\s+") gives this output:

first second third
result.length: 1
==
first