LeetCode 557. 反转字符串中的单词 III

package string;

import java.util.Arrays;

/**
 * Created with IntelliJ IDEA.
 * Version : 1.0
 * Author  : 村雨遥
 * Email   : cunyu1024@foxmail.com
 * Website : https://cunyu1943.github.io
 * 公众号   : 村雨遥
 * Date    : 2020/4/5 21:07
 * Project : LeetCode
 * Package : string
 * Class   : FiveSevenSeven
 * Desc    : 557. 反转字符串中的单词 III
 */
public class FiveSevenSeven {
	public static void main(String[] args) throws Exception {
		String str = "Let's take LeetCode contest";
		FiveSevenSeven fiveSevenSeven = new FiveSevenSeven();
		System.out.println(fiveSevenSeven.reverseWord("let's"));
		System.out.println(fiveSevenSeven.reverseWords(str));

	}

	/**
	 * 反转字符串中的单词
	 * @param s
	 * @return 反转单词后的字符串
	 */
	public String reverseWords(String s) {
		String resultStr = " ";
		String[] arr = s.split(" ");
		for (String value : arr) {
			resultStr = resultStr.concat(reverseWord(value) + " ");
		}
		return resultStr.trim();
	}

	/**
	 * 反转一个单词
	 * @param s
	 * @return 反转后的单词
	 */
	public String reverseWord(String s) {
		String str = "";
		for (int i = 0; i < s.length(); i++) {
			str += s.charAt(s.length() - 1 - i);
		}
		return str;
	}
}