public static void toHex(int num)
{
  char[] chs = {'0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F'};
  //定义一个临时容器
  char[] arr = new char [8];
  int pos =arr.length;
  while (num!=0 )
  {
   int temp = num&15;
   arr[--pos]=chs[temp];
            num = num >>> 4;
  }
上面那个临时定义的容器为什么长度最大是8？

public static void toHex(int num)
{
  char[] chs = {'0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F'};
  //定义一个临时容器
  char[] arr = new char [8];
  int pos =arr.length;
  while (num!=0 )
  {
   int temp = num&15;
   arr[--pos]=chs[temp];
            num = num >>> 4;
  }
上面那个临时定义的容器为什么长度最大是8？