Given a string, you need to reverse the order of characters in each word within a sentence while still preserving whitespace and initial word order.
Example 1: Input: “Let’s take LeetCode contest” Output: “s’teL ekat edoCteeL tsetnoc” Note: In the string, each word is separated by single space and there will not be any extra space in the string.
两层for循环暴力求解法，没什么多说的
public static String reverseWords(String s) { String[] strings = s.split(" "); StringBuilder stringBuilder = new StringBuilder(); for (int i = 0; i < strings.length; i++) { StringBuilder stringBuilder1 = new StringBuilder(); for(int j=strings[i].length()-1;j>=0;j--){ stringBuilder1.append(strings[i].charAt(j)); } stringBuilder1.append(" "); stringBuilder.append(stringBuilder1); } stringBuilder.deleteCharAt(stringBuilder.length()-1); return stringBuilder.toString(); }