[11][JDK-6303622]Use generic in Swing components like JComboBox

[Krishna Addepalli]

Hi All,

 

Please review a fix for the Enhancement:

 

JDK-6303622: https://bugs.openjdk.java.net/browse/JDK-6303622

Webrev: http://cr.openjdk.java.net/~kaddepalli/6303622/webrev00/

 

The enhancement requests to provide the generic return type for 
getSelectedItem() to avoid ugly casts for the developers using the api. Have 
done changes accordingly for JComboBox and JList, and all supporting classes.

 

Thanks,

Krishna