8346294: Invalid lint category specified in compiler.properties

Reviewed-by: mcimadamore

make/langtools/tools/propertiesparser/resources/templates.properties

@@ -1,5 +1,5 @@
 #
-# Copyright (c) 2015, 2019, Oracle and/or its affiliates. All rights reserved.
+# Copyright (c) 2015, 2024, Oracle and/or its affiliates. All rights reserved.
 # DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 #
 # This code is free software; you can redistribute it and/or modify it
@@ -82,5 +82,5 @@ suppress.warnings=\
   @SuppressWarnings("rawtypes")\n
 
 lint.category=\
-  LintCategory.get({0})
+  LintCategory.get({0}).get()
 

src/jdk.compiler/share/classes/com/sun/tools/javac/code/Lint.java

@@ -28,6 +28,7 @@ package com.sun.tools.javac.code;
 import java.util.Arrays;
 import java.util.EnumSet;
 import java.util.Map;
+import java.util.Optional;
 import java.util.concurrent.ConcurrentHashMap;
 
 import com.sun.tools.javac.code.Symbol.*;
@@ -362,8 +363,14 @@ public class Lint
             map.put(option, this);
         }
 
-        public static LintCategory get(String option) {
-            return map.get(option);
+        /**
+         * Get the {@link LintCategory} having the given command line option.
+         *
+         * @param option lint category option string
+         * @return corresponding {@link LintCategory}, or empty if none exists
+         */
+        public static Optional<LintCategory> get(String option) {
+            return Optional.ofNullable(map.get(option));
         }
 
         public final String option;
@@ -441,9 +448,8 @@ public class Lint
 
         public void visitConstant(Attribute.Constant value) {
             if (value.type.tsym == syms.stringType.tsym) {
-                LintCategory lc = LintCategory.get((String) (value.value));
-                if (lc != null)
-                    suppress(lc);
+                LintCategory.get((String)value.value)
+                  .ifPresent(this::suppress);
             }
         }
 

src/jdk.compiler/share/classes/com/sun/tools/javac/resources/compiler.properties

@@ -1880,7 +1880,7 @@ compiler.warn.lintOption=\
 compiler.warn.constant.SVUID=\
     serialVersionUID must be constant in class {0}
 
-# lint: dangling
+# lint: dangling-doc-comments
 compiler.warn.dangling.doc.comment=\
     documentation comment is not attached to any declaration