class SwitchDemo
{
	public static void main(String args[])
   {
		char c;
       System.out.println("請輸入數字：");
       c = (char)System.in.read();
       
       switch( c )
       {
			case 0:
              System.out.println("測試輸入0");
           break;
			case 1:
              System.out.println("測試輸入1");
           break;
			case 2:
              System.out.println("測試輸入2");
           break;
			case 3:
              System.out.println("測試輸入3");
           break;
           default：
             System.out.println("輸入的字符不在0-3之間");
       }
   }
}