Python 翻转句子

Question

两次翻转即可完成

public class Solution {
  public String ReverseSentence(String str) {
    char[] chars = str.toCharArray();
    reverse(chars,0,chars.length - 1);
    int blank = -1;
    for(int i = 0;i < chars.length;i++){
      if(chars[i] == ' '){ 
        int nextBlank = i;
        reverse(chars,blank + 1,nextBlank - 1);
        blank = nextBlank;
      }
    }
    reverse(chars,blank + 1,chars.length - 1); // 最后一个单词单独进行反转
    return new String(chars);
     
  }
  public void reverse(char[] chars,int low,int high){
    while(low < high){
      char temp = chars[low];
      chars[low] = chars[high];
      chars[high] = temp;
      low++;
      high--;
    }
  }
}