字符串翻转

String："this is my hello world"
结果：[world, hello, my, is, this]

/**
  * 字符串翻转
  * @param values
  * @param reg 字符串split正则
  */
 public static void reverse(String values,String reg) {
   if (values == null ){
     return;
   }

   String[] value = values.split(reg);
   int a = 0 ;
   int b = value.length-1;
   while (a < b){
     String temp = value[a];
     value[a] = value[b];
     value[b] = temp;
     a++;
     b--;
   }

   System.out.println(Arrays.toString(value));
 }