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Re: Java 8 Lambda with generic types

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On 8/28/2016 10:45 AM, Stone Zhong wrote:
> Having checkToy take generic parameter is a workaround, but it does not solve the problem which it does not work with <?>. For example, if you have:
>
>
>     public static void checkToys(Toy<?> ... toys) {
>     }
>
> You cannot put a generic type here for checkToys, and you cannot call
>
>         checkToys(
>             () -> Arrays.<Integer>asList(10),
>             () -> Arrays.<String>asList("hello")
>         );
>
> But you can do
>
>         checkToys(
>             new Toy<Integer>() {
>                 @Override
>                 public List<Integer> get() {
>                     return Arrays.<Integer>asList(1, 2, 3);
>                 }
>             },
>             new Toy<String>() {
>                 @Override
>                 public List<String> get() {
>                     return Arrays.<String>asList("a", "b", "c");
>                 }
>             }
>         );

@SuppressWarnings("rawtypes")
public static void checkToys(Toy ... toys) {

Arne

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Java 8 Lambda with generic types Stone Zhong <stone.zhong@gmail.com> - 2016-08-27 23:50 -0700
  Re: Java 8 Lambda with generic types Stone Zhong <stone.zhong@gmail.com> - 2016-08-28 00:02 -0700
    Re: Java 8 Lambda with generic types Arne Vajhøj <arne@vajhoej.dk> - 2016-08-28 07:46 -0400
      Re: Java 8 Lambda with generic types Steven Simpson <ss@my.domain.invalid> - 2016-08-28 15:00 +0100
        Re: Java 8 Lambda with generic types Lew <lewbloch@gmail.com> - 2016-08-30 22:25 -0700
          Re: Java 8 Lambda with generic types Steven Simpson <ss@my.domain.invalid> - 2016-08-31 17:19 +0100
  Re: Java 8 Lambda with generic types Steven Simpson <ss@my.domain.invalid> - 2016-08-28 08:19 +0100
  Re: Java 8 Lambda with generic types Stone Zhong <stone.zhong@gmail.com> - 2016-08-28 03:26 -0700
  Re: Java 8 Lambda with generic types Stone Zhong <stone.zhong@gmail.com> - 2016-08-28 07:45 -0700
    Re: Java 8 Lambda with generic types Arne Vajhøj <arne@vajhoej.dk> - 2016-08-28 13:22 -0400
  Re: Java 8 Lambda with generic types Stone Zhong <stone.zhong@gmail.com> - 2016-08-28 07:57 -0700
  Re: Java 8 Lambda with generic types Stone Zhong <stone.zhong@gmail.com> - 2016-08-28 10:43 -0700
    Re: Java 8 Lambda with generic types Arne Vajhøj <arne@vajhoej.dk> - 2016-08-30 20:35 -0400
  Re: Java 8 Lambda with generic types Stone Zhong <stone.zhong@gmail.com> - 2016-09-02 15:18 -0700

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