leetcode:151Reverse Words in a String java实现

Given an input string, reverse the string word by word.

For example,

Given s = "

the sky is blue

",

return "

blue is sky the

".
题目分析：太简单了，要注意一点 split可能会返回空串

<pre name="code" class="java"> public String reverseWords(String s) {
		  if(s.length()==0) return s;
		  String[] array=s.split(" ");
		  if(array.length==0) return new String();
		  StringBuffer sb=new StringBuffer();
		  for(int i=array.length-1;i>=0;i--)
		  {
			  if(array[i].length()==0) continue;//" 1"分割会出现空串和1
			  sb.append(array[i]+" ");
		  }
		  return sb.toString().substring(0, sb.length()-1);

	    }