问题描述： 将 here you are 翻转为 are you here

思路：
先将字符串整体翻转，然后把字符串按照空格隔开，将每个单词分别再次翻转。

代码如下：

public static void main(String[] args) {
    String string = "here you are";
    //先把所有的字符串翻转
    String result = reverse(string);
    System.out.println(result);
  }
  
  static String reverse(String string){
    StringBuilder stringBuilder2 = new StringBuilder();
    String string2 = reverseString(string);
    
    String[] words = string2.split(" ");
    
    for (int i = 0; i < words.length; i++) {
      stringBuilder2.append(reverseString(words[i])+" ");
    }
    
    return stringBuilder2.deleteCharAt(stringBuilder2.length()-1).toString();
    
  }
  
  
  static String reverseString(String string){
    StringBuilder stringBuilder = new StringBuilder(string);
    return stringBuilder.reverse().toString();
  }