Reversing characters in each word in a sentence - Stack Implementation

Question

This code is inside the main function:

Scanner input = new Scanner(System.in);

System.out.println(\"Type a sentence\");
String sentence = input         


        

Answer 1

public class reverseStr {
public static void main(String[] args) {
    String testsa[] = { "", " ", "       ", "a ", " a", " aa bd  cs " };
    for (String tests : testsa) {
        System.out.println(tests + "|" + reverseWords2(tests) + "|");
    }
}

public static String reverseWords2(String s) {
    String[] sa;
    String out = "";
    sa = s.split(" ");
    for (int i = 0; i < sa.length; i++) {
        String word = sa[sa.length - 1 - i];
        // exclude "" in splited array
        if (!word.equals("")) {
            //add space between two words
            out += word + " ";
        }
    }
    //exclude the last space and return when string is void
    int n = out.length();
    if (n > 0) {
        return out.substring(0, out.length() - 1);
    } else {
        return "";
    }
}

}

This can pass in leetcode