Stubs for Constants API (jep334)

[theresa-m]

This change adds the remaining method stubs for jep334 that were not directly needed to compile Java12 and adjusts interface implementation dependencies for Constable classes.

Java 12 depends on #3980 to compile (also see #4195)

Signed-off-by: Theresa Mammarella Theresa.T.Mammarella@ibm.com

[theresa-m]

update copyrights

[pshipton]

Note System.Logger.Level implements Constable
http://cr.openjdk.java.net/~iris/se/12/build/latest/api/java.base/java/lang/System.Logger.Level.html

[pshipton]

and Thread.State implements Constable
http://cr.openjdk.java.net/~iris/se/12/build/latest/api/java.base/java/lang/Thread.State.html

[pshipton]

and StackWalker.Option implements Constable
http://cr.openjdk.java.net/~iris/se/12/build/latest/api/java.base/java/lang/StackWalker.Option.html

[DanHeidinga]

lgtm

[DanHeidinga]

@theresa-m Can you rebase and squash these two commits?

[pshipton]

Note these changes are required, either here or in another PR.

System.Logger.Level implements Constable
http://cr.openjdk.java.net/~iris/se/12/build/latest/api/java.base/java/lang/System.Logger.Level.html

Thread.State implements Constable
http://cr.openjdk.java.net/~iris/se/12/build/latest/api/java.base/java/lang/Thread.State.html

StackWalker.Option implements Constable
http://cr.openjdk.java.net/~iris/se/12/build/latest/api/java.base/java/lang/StackWalker.Option.html

[theresa-m]

working on that. I'll add the extra extends here as well

[theresa-m]

actually I thought that because Enum already implements Constable that it wasn't necessary to add implements Constable to these explicitly. do you still want them included?

[pshipton]

I thought that because Enum already implements Constable that it wasn't necessary to add implements Constable to these explicitly

Sounds good. I missed that because I was just looking at changes in the classes OpenJ9 implements.

[DanHeidinga]

Jenkins test sanity zlinux jdk11

[DanHeidinga]

Once the jdk11 sanity build passes, I'll merge this.