ok. Modified webrev:

http://cr.openjdk.java.net/~psadhukhan/8182577/webrev.02/

Regards
Prasanta
On 6/21/2017 7:45 PM, Semyon Sadetsky wrote:
Hi Prasanta,

Ii is not necessary to cast to DefaultButtonModel after you add getGroup() to ButtonModel:

241 ButtonModel model = ((JToggleButton)aComponent).getModel();

--Semyon

On 06/20/2017 10:36 PM, Prasanta Sadhukhan wrote:
Hi Semyon,

Yes, it seems the problem will be there in that case. Modified to have getGroup() in the interface
http://cr.openjdk.java.net/~psadhukhan/8182577/webrev.01/

Regards
Prasanta
On 6/20/2017 11:16 PM, Semyon Sadetsky wrote:
Hi Prasanta,

With the DefaultButtonModel we can get the same exception if a custom implementation of the ButtonModel is used.

So, it is better check whether the model is a DefaultButtonModel and skip if grouping is not supported. Or, perhaps, it is reasonable to pull up the getGroup() into the ButtonModel interface which already has setGroup().

--Semyon


On 06/20/2017 10:21 AM, Prasanta Sadhukhan wrote:
Hi All,

Please review a fix for an issue where a crash is reported when focus is moved with custom ButtonModel. Issue was in LayoutFocusTraversalPolicy, the ButtonModel was wrongly typecasted to JToggleButton when the button model is DefaultButtonModel, resulting in ClassCastException.

Proposed fix is to cast to super class DefaultButtonModel and then check for JToggleButton member.

Bug: https://bugs.openjdk.java.net/browse/JDK-8182577
webrev: http://cr.openjdk.java.net/~psadhukhan/8182577/webrev.00/

Regards
Prasanta




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