while之后if出现unreachable　statement

 1     public static void main(String[] args) {
 2         System.out.println("check{unreachable statement}");
 3         boolean flag =false;
 4         while(true)
 5         {
 6 
 7         }
 8         if (flag)
 9         {
10         }
11     }

 1     public static void main(String[] args) {
 2         System.out.println("check{unreachable statement}");
 3         boolean flag =false;
 4         while(true)
 5         {
 6             break;
 7         }
 8         if (flag)
 9         {
10         }
11     }