反转给定的句子，而不反转单个单词

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class A050 {

public static void main(String[] args) throws IOException {
    BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
    //System.out.println("Enter the string");
    String s = br.readLine();
    String rev = StringRev(s);
    System.out.println(rev);
}

private static String StringRev(String s) {
    char[] modString = new char[s.length()];
    for (int i = 0; i < s.length(); i++) {
        modString[i] = s.charAt(s.length() - 1 - i);
    }
    s = s.copyValueOf(modString);
    String reverseWord = "";
    String eachWord;
    for (String part : s.split(" ")) {
        eachWord = new StringBuilder(part).reverse().toString();
        reverseWord = reverseWord + eachWord + " ";
    }
    return reverseWord;
  }
}