Reverse each word in string

Reverse each word in a string

• We can reverse each word in a given string using for-loop, string methods, string buffer, string builder, and java 8 as well.

Examples:

Input:   keep learners

output: peek srenrael

Input:   abc def

output: cba fed

Program to reverse each word in a string:

import java.util.Collections;
import java.util.stream.Collectors;
import java.util.stream.IntStream;

public class reverseWordsInString {
    public static void main(String[] args) {
    String str = "keep learners blogger";

    String[] words = str.split("\\s"); // split using space
    String revString = "";

    for (int i = 0; i <= words.length - 1; i++) {

        String word = words[i];
        String revWord = "";
    
        for (int j = word.length() - 1; j >= 0; j--) {
            revWord += word.charAt(j); // reversing each word
        }
        revString += revWord + " "; // concat reversed words
    }
    System.out.println("Reversed rach word in string = " + revString);
    
    System.out.println("<<------------------------------>>");
    
    String revWordSb = "";
    for (int i = 0; i <= words.length - 1; i++) {
        String word = words[i];
    
        StringBuffer sb = new StringBuffer(word);
        revWordSb += sb.reverse() + " ";
    }
    System.out.println("Reverse each word in string using stringBuffer=" + revWordSb);
    System.out.println("<<------------------------------>>");

    String revWordSbuilder = "";
    for (int i = 0; i <= words.length - 1; i++) {
        String word = words[i];
    
        StringBuilder sb = new StringBuilder(word);
        revWordSbuilder += sb.reverse() + " ";
    }
    System.out.println("Reverse each word in string using StringBuilder=" + revWordSbuilder);
    System.out.println("<<------------------------------>>");
    
    System.out.print("Reverse each word in string using java8=");

    for (int i = 0; i <= words.length - 1; i++) {
        String word = words[i];
    
        IntStream.range(0, word.length()). // create index [0 .. s.length - 1]
            boxed(). // the next step requires them boxed
            sorted(Collections.reverseOrder()). // indices in reverse order
            map(j -> String.valueOf(word.charAt(j))).collect(Collectors.toList())
            .forEach(a -> System.out.print(a));
        System.out.print(" ");
    }
  }
}

Output:

Reverse each word in string

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