Hello,
FYI, a new javac lint warning is in the works and out for review on
compiler-dev:
JDK-8071961: Add javac lint warning when a default constructor is
created
https://mail.openjdk.java.net/pipermail/compiler-dev/2020-July/014782.html
The warning notes where a formal API class exposes a default
constructor, that is, an implicit constructor generated by the compiler
(see JLS 8.8.9 for details
https://docs.oracle.com/javase/specs/jls/se14/html/jls-8.html#jls-8.8.9).
The JDK modules are generally compiled under "-Xlint:all -Werror".
Therefore, if a new lint warning is added *without* first clearing those
conditions, the build will break. Many modules have already been cleared
(JDK-8250212); others are still in progress (JDK-8250639).
Please review the make system portions of JDK-8071961 that disable the
warning on modules where the new warning still has some occurrences:
http://cr.openjdk.java.net/~darcy/8071961.7/
Patch for the relevant file below. Depending on the relative timing of
fixing the warning locations and the javac changes being ready, some of
the module changes in the make file might be removed.
Thanks,
-Joe
--- old/make/CompileJavaModules.gmk 2020-07-31 14:04:28.285167000 -0700
+++ new/make/CompileJavaModules.gmk 2020-07-31 14:04:27.657167000 -0700
@@ -76,6 +76,7 @@
################################################################################
+java.desktop_DISABLED_WARNINGS += default-ctor
java.desktop_DOCLINT += -Xdoclint:all/protected,-reference \
'-Xdoclint/package:java.*,javax.*'
java.desktop_COPY += .gif .png .wav .txt .xml .css .pf
@@ -298,6 +299,10 @@
################################################################################
+jdk.accessibility_DISABLED_WARNINGS += default-ctor
+
+################################################################################
+
jdk.charsets_COPY += .dat
################################################################################
@@ -347,10 +352,19 @@
################################################################################
+jdk.jartool_DISABLED_WARNINGS += default-ctor
jdk.jartool_JAVAC_FLAGS += -XDstringConcat=inline
################################################################################
+jdk.httpserver_DISABLED_WARNINGS += default-ctor
+
+################################################################################
+
+jdk.unsupported.desktop_DISABLED_WARNINGS += default-ctor
+
+################################################################################
+
# No SCTP implementation on Mac OS X or AIX. These classes should be
excluded.
SCTP_IMPL_CLASSES = \
$(TOPDIR)/src/jdk.sctp/unix/classes/sun/nio/ch/sctp/AssociationChange.java \
