String reverse using Java'sstringbuilder

Question

I develop using Java to make a little project.

I want String reverse. If I entered "I am a girl", Printed reversing...

Already I tried to use StringBuilder. Also I write it using StringBuffer grammar... But I failed... It is not printed my wish...

WISH

My with Print -> "I ma a lrig"

"I am a girl" -> "I ma a lrig" REVERSE!!

How can I do?..

Please help me thank you~!!!

public String reverse() {        
    String[] words = str.split("\\s");       
    StringTokenizer stringTokenizer = new StringTokenizer(str, " ");

    for (String string : words) {
        System.out.print(string);
    }

    String a = Arrays.toString(words);

    StringBuilder builder = new StringBuilder(a);

    System.out.println(words[0]);

    for (String st : words){
        System.out.print(st);
    }

    return "";     
}

Answer 1

Java 8 code to do this :

public static void main(String[] args) {
    String str = "I am a girl";
    StringBuilder sb = new StringBuilder();
    // split() returns an array of Strings, for each string, append it to a StringBuilder by adding a space.
    Arrays.asList(str.split("\\s+")).stream().forEach(s -> {
        sb.append(new StringBuilder(s).reverse() + " ");
    });
    String reversed = sb.toString().trim(); // remove trailing space
    System.out.println(reversed);
}

O/P :

I ma a lrig