JAVA-Switch语句Demo

class SwitchDemo
{
 public static void main(String[] args)
 {
  int month = 5;
  //if (month > 12 && month < 1)
   //System.out.println("Error Month!");
  //else if (month >= 3 || month <= 5)
   //System.out.println("spring!");
  //else if (month >= 6 || month <= 8)
   //System.out.println("summer!");
  //else if (month >= 9 || month <= 11)
   //System.out.println("autumn!");
  //else
   //System.out.println("winter!");
  switch (month) //只能接受四种数据类型：byte,short,int,char
  {
   default:
    System.out.println("无效的月份！");
    break;
   case 1:  //没有break语句，继续向下执行，不进行判断
   case 2:
   case 12:
    System.out.println(month + "月：冬天！");
    break;
   case 3:
   case 4:
   case 5:
    System.out.println(month + "月：春天！");
    break;
   case 6:
   case 7:
   case 8:
    System.out.println(month + "月：夏天！");
    break;
   case 9:
   case 10:
   case 11:
    System.out.println(month + "月：秋天！");
   // break;     //switch最后一个break可以省略.
   

  }
 }
}