Reverse Middle Words in a String

You are given string S as a input. You has to reverse all the words in the input except first and last word.

INPUT
"hello how are you"
OUTPUT
hello woh era you

JAVA Solution
import java.util.*;
public class Hello {
    public static void main(String[] args) {
        Scanner s = new Scanner(System.in);
        String str = s.nextLine();
        String str1[] = str.split(" ");
        int i, len = str1.length, len1 = len-1;
        for(i=0;i<len;i++)
        {
            if(i!=0&&i!=len1)
            {
                StringBuilder sb = new StringBuilder(str1[i]);
                System.out.print(sb.reverse().toString()+" ");
            }
            else
            System.out.print(str1[i]+" ");
        }
    }
}

If anyone come up with better solution or having queries leave it in comment.
Keep Programming....!!!