<Swing Dev> JDK 9 RFR of JDK-8043548: Fix raw and unchecked lint warnings in javax.swing.plaf.*

[Joe Darcy]

Hello,

Please review the (unexpected large) fix for

     JDK-8043548: Fix raw and unchecked lint warnings in javax.swing.plaf.*
     http://cr.openjdk.java.net/~darcy/8043548.0/

In most of the javax.swing.multi.MultiFoo.java type, I replaced a raw 
Vector with a Vector<ComponentUI> and was then able to delete a number 
of now redundant casts. In some of the MultiFoo classes,

     src/share/classes/javax/swing/plaf/multi/MultiPopupMenuUI.java
     src/share/classes/javax/swing/plaf/multi/MultiTabbedPaneUI.java
     src/share/classes/javax/swing/plaf/multi/MultiTextUI.java
     src/share/classes/javax/swing/plaf/multi/MultiTreeUI.java

all the elements stored are actually a more specific type than 
ComponentUI, say, PopupMenuUI. In those cases, I still used a 
Vector<ComponentUI> rather than, say, a Vector<PopupMenuUI> to deal with 
other aspects of the API. In particular, the MultiFoo classes have a method

     ComponentUI[] getUIs() methods

which is computed over in MultiLookAndFeel. Generifying methods in 
MultiLookAndFeel, particularly creatUIs, to work properly in the face of 
generics would unfortunately be problematic.

A few classes in javax.swing had to be updated now to fully clear the 
warnings in plaf; the rest of javax.swing will be handled in future work 
(JDK-8043550: Fix raw and unchecked lint warnings in javax.swing.*).

Some additional changes were needed in sun/swing/BakedArrayList.java, 
but that class should probably be removed from the platform.

I ran SwingSet2 with a build having these changes and nothing appeared 
obviously wrong.

Thanks,

-Joe