JDK 9 RFR of JDK-8039102: Add raw and unchecked lint warnings to build of jdk repository

[Joe Darcy]

Hello,

With the effort to clear the jdk repo of rawtypes and unchecked warnings 
(see  JDK-8039096), I'd like to get an early review for the happy day 
when those warnings can be turned on in the build:

     JDK-8039102: Add raw and unchecked lint warnings to build of jdk 
repository

The patch is as expected:

diff -r f1cc18a769e5 make/Setup.gmk
--- a/make/Setup.gmk    Tue Apr 08 17:36:13 2014 +0200
+++ b/make/Setup.gmk    Tue Apr 08 10:45:40 2014 -0700
@@ -27,7 +27,7 @@

  # To build with all warnings enabled, do the following:
  # make JAVAC_WARNINGS="-Xlint:all -Xmaxwarns 10000"
-JAVAC_WARNINGS := 
-Xlint:-unchecked,-deprecation,-overrides,auxiliaryclass,cast,classfile,dep-ann,divzero,empty,overloads,serial,static,try,varargs 
-Werror
+JAVAC_WARNINGS := 
-Xlint:-deprecation,-overrides,auxiliaryclass,cast,classfile,dep-ann,divzero,empty,overloads,rawtypes,serial,static,try,unchecked,varargs 
-Werror

  # Any java code executed during a JDK build to build other parts of 
the JDK must be
  # executed by the bootstrap JDK (probably with -Xbootclasspath/p: ) 
and for this

Full webrev:

     http://cr.openjdk.java.net/~darcy/8039102.0/

There are several source code related lint warnings not currently 
enabled in the jdk build.

         fallthrough     Warn about falling through from one case of a 
switch statement to the next.
         finally             Warn about finally clauses that do not 
terminate normally.
         overrides        Warn about issues regarding method overrides.
         rawtypes        Warn about use of raw types. (see JDK-8039096)
         unchecked      Warn about unchecked operations (see JDK-8039096)

Once a few more of these are resolved, it will probably be time to 
switch JAVAC_WARNINGS more fully to an opt-out syntax for any remaining 
problem areas:

-Xlint:all,-deprecation,-processing, ...

Thanks,

-Joe