Bug 59462 - Java.Util.NoSuchElementException couldn't cast to Java.Lang.Object
Summary: Java.Util.NoSuchElementException couldn't cast to Java.Lang.Object
Status: CONFIRMED
Alias: None
Product: Android
Classification: Xamarin
Component: Android+BCL Integration ()
Version: unspecified
Hardware: PC Mac OS
: --- normal
Target Milestone: ---
Assignee: Marek Habersack
URL:
Depends on:
Blocks:
 
Reported: 2017-09-13 17:27 UTC by Tuyen Duc Vu
Modified: 2017-09-14 18:26 UTC (History)
2 users (show)

Tags:
Is this bug a regression?: ---
Last known good build:

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Status:
CONFIRMED

Description Tuyen Duc Vu 2017-09-13 17:27:34 UTC
It should work, but actually

```
Java.Util.NoSuchElementException couldn't cast to Java.Lang.Object
```
Comment 1 Jon Douglas [MSFT] 2017-09-14 15:06:39 UTC
(In reply to Tuyen Duc Vu from comment #0)
> It should work, but actually
> 
> ```
> Java.Util.NoSuchElementException couldn't cast to Java.Lang.Object
> ```

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1. Steps to Reproduce or Reproducible Project
2. Actual Results
3. Expected Results
4. Version Information

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Comment 2 Tuyen Duc Vu 2017-09-14 15:23:04 UTC
1. Steps to Reproduce or Reproducible Project
- Create a new Java.Util.NoSuchElmentException
- Cast it to Java.Lang.Object
2. Actual Results
- Compiler error: Unable to cast
3. Expected Results
- No comiler error, cast successfully
4. Version Information
- Lastest
Comment 3 Jon Douglas [MSFT] 2017-09-14 18:26:18 UTC
I can CONFIRM this issue. I believe this might need the use of a JavaCast instead of a managed cast.

Can you try using a JavaCast? Here is an example:

>    Java.Util.NoSuchElementException ex = new Java.Util.NoSuchElementException();
>    var test = Android.Runtime.Extensions.JavaCast<Java.Lang.Object>(ex);

> The JavaCast() method allows performing such type conversions while bypassing the managed type system and instead relying upon the Android runtime system to perform the type checking. 

https://developer.xamarin.com/api/member/Android.Runtime.Extensions.JavaCast%7BTResult%7D/p/Android.Runtime.IJavaObject/