try..catch..finally塊中的跳轉語句（return，break，continue）使用注意事項

public class TryReturn {
     public static void main(String[] args) {
          // mtd1()返回1? mtd2()返回2?
          // 很可惜，返回的都是3
          // 結論： 不要在try..catch..finally塊中出現return等跳轉出塊範圍的語句（<<Effective java>>對此問題也有討論)
          System.out.println(mtd1()); // output: 3
          System.out.println(mtd2()); // output: 3
     }

     public static String mtd1() {
          try {
               return "1";
          } catch (Exception e) {
               return "2";
          } finally {
               return "3";
          }
     }

     public static String mtd2() {
          try {
               throw new Exception();
          } catch (Exception e) {
               return "2";
          } finally {
               return "3";
          }
     }
}