Cannot throw exception from switch-"unreachable statement"

Question

Hi,
why is this an unreachable statement?
  public static Msg newMsg(int type, Object data)
      Msg msg;
      switch (type)
          case MsgTypes.MSG_CLUSTER_CREATED:
              msg=new MsgClusterCreated(); break;
          case MsgTypes.MSG_REPLY:
              msg=new MsgReply(); break;
          default:
              throw new MessageTypeNotDeclaredException(); break;     //unreachable statement!!!        
      msg.setDataSegment(data);
      return msg;
  }

Answer 1

When you throw an exception, the program flow never continues "normally" on the next line --- control is always transferred to the nearest exception handler. Thus control never reaches the break statement on the same line, and "unreachable statements" like this are illegal in Java.
Solution: remove the unnecessary "break;"