Java Coding Problems

3. Reversing letters and words

First, let's reverse only the letters of each word. The solution to this problem can exploit the StringBuilder class. The first step consists of splitting the string into an array of words using a white space as the delimiter (Spring.split(" ")). Furthermore, we reverse each word using the corresponding ASCII codes and append the result to StringBuilder. First, we split the given string by space. Then, we loop the obtained array of words and reverse each word by fetching each character via charAt() in reverse order:

private static final String WHITESPACE = " ";...public String reverseWords(String str) { String[] words = str.split(WHITESPACE); StringBuilder reversedString = new StringBuilder(); for (String word: ...