[Java lista] SCJP vizsga

[biziclop]

Ez mintha egy duplan beugratos A helyett C helyett valojaban D lenne.
De az is lehet, hogy triplan beugratos, en en is beugrottam. :)

lsp

On 8/15/07, Jozsef Tabanyi <joco at kac.duf.hu> wrote:
>
> Csak egy pelda a szivatos kerdesekre:
>
>  Given:
>
>
>  1.  enum Days {MONDAY, TUESDAY, WEDNESDAY}
>  2.
>  3.  class Test {
>  4.    public static void main(String [] args) {
>  5.      int x = 0;
>  6.      Days d = Days.TUESDAY;
>  7.      switch(d) {
>  8.        case MONDAY: x++;
>  9.        case TUESDAY: x = x + 10;
> 10.        case WEDNESDAY: x = x + 100;
> 11.        case THURSDAY: x = x + 1000;
> 12.      }
> 13.      System.out.println("x = " + x);
> 14.    }
> 15.  }
>
>
> What is the result?
>
>
> A
>         x = 10
> B
>         x = 110
> C
>         x = 1110
> D
>         Compilation fails.
> E
>         An exception is thrown at runtime.
>
>
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> Option D is correct.
> Compilation fails because THURSDAY was never enumerated.
> It is valid to use a correctly defined and referenced enum in a switch.
>
> joco
>
> Jozsef Tabanyi
> mailto:jozsef at tabanyi.hu
> http://www.tabanyi.hu
>
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