RFR [9] Remove sun.misc.Queue and replace usages with standard Collections

[Mandy Chung]

cc'ing awt-dev.

This change looks okay.

Mandy

> On Dec 11, 2015, at 9:22 AM, Chris Hegarty <chris.hegarty at oracle.com> wrote:
> 
> More technical debt in sun.misc…
> 
> Java SE has had support for Queues in Collections for many major releases,
> sun.misc.Queue seems to predate that. I cannot find any usages outside of the
> JDK, and just one in the JDK, AppletPanel. LinkedBlockingQueue appears to
> provide the necessary minimum functionality required by AppletPanel, FIFO
> blocking operations.  
> 
> The changes are quite small so I just included the diffs inline.
> 
> Note: we could use either add(E) or offer(E) below, I don’t have a strong opinion
> either way.
> 
> $ hg rm src/java.base/share/classes/sun/misc/Queue.java
> 
> diff --git a/src/java.desktop/share/classes/sun/applet/AppletPanel.java b/src/java.desktop/share/classes/sun/applet/AppletPanel.java
> --- a/src/java.desktop/share/classes/sun/applet/AppletPanel.java
> +++ b/src/java.desktop/share/classes/sun/applet/AppletPanel.java
> @@ -38,6 +38,7 @@
> import java.security.*;
> import java.util.*;
> import java.util.Locale;
> +import java.util.concurrent.LinkedBlockingQueue;
> import sun.awt.AWTAccessor;
> import sun.awt.AppContext;
> import sun.awt.EmbeddedFrame;
> @@ -45,7 +46,6 @@
> import sun.misc.ManagedLocalsThread;
> import sun.misc.MessageUtils;
> import sun.misc.PerformanceLogger;
> -import sun.misc.Queue;
> import sun.security.util.SecurityConstants;
> 
> /**
> @@ -247,8 +247,7 @@
>     /**
>      * AppletEvent Queue
>      */
> -    private Queue<Integer> queue = null;
> -
> +    private LinkedBlockingQueue<Integer> queue = null;
> 
>     public synchronized void addAppletListener(AppletListener l) {
>         listeners = AppletEventMulticaster.add(listeners, l);
> @@ -276,10 +275,10 @@
>         synchronized(this) {
>             if (queue == null) {
>                 //System.out.println("SEND0= " + id);
> -                queue = new Queue<>();
> +                queue = new LinkedBlockingQueue<>();
>             }
> -            Integer eventId = Integer.valueOf(id);
> -            queue.enqueue(eventId);
> +            boolean inserted = queue.offer(id);
> +            assert inserted;
>             notifyAll();
>         }
>         if (id == APPLET_QUIT) {
> @@ -303,8 +302,8 @@
>         while (queue == null || queue.isEmpty()) {
>             wait();
>         }
> -        Integer eventId = queue.dequeue();
> -        return new AppletEvent(this, eventId.intValue(), null);
> +        int eventId = queue.take();
> +        return new AppletEvent(this, eventId, null);
>     }
> 
>     boolean emptyEventQueue() {
> 
> -Chris.