fix: MutableClasses: add java.util.Locale, fix reference to java.awt.Cursor

CHANGELOG.md

@@ -13,6 +13,8 @@ Currently the versioning policy of this project follows [Semantic Versioning v2.
 - Agree verb with plural subject in the description of
 `SW_SWING_METHODS_INVOKED_IN_SWING_THREAD` ([#1664](https://github.com/spotbugs/spotbugs/pull/1664))
 - Wrong description of the `SE_TRANSIENT_FIELD_OF_NONSERIALIZABLE_CLASS` ([#1664](https://github.com/spotbugs/spotbugs/pull/1664))
+- Fixed java.util.Locale as being flagged as EI  ([#1702](https://github.com/spotbugs/spotbugs/pull/1702))
+- Fixed reference to java.awt.Cursor which caused it to be flagged as EI ([#1702](https://github.com/spotbugs/spotbugs/pull/1702))
 - Treat types with `@com.google.errorprone.annotations.Immutable` as immutable ([#1705](https://github.com/spotbugs/spotbugs/pull/1705))
 - Fix annotation check for `jdk.internal.ValueBased` ([#1706](https://github.com/spotbugs/spotbugs/pull/1706))
 

spotbugs/src/main/java/edu/umd/cs/findbugs/util/MutableClasses.java

@@ -21,7 +21,7 @@ public class MutableClasses {
             "java.lang.Float", "java.lang.StackTraceElement", "java.lang.Class", "java.math.BigInteger",
             "java.math.Decimal", "java.io.File", "java.awt.Font", "java.awt.BasicStroke",
             "java.awt.Color", "java.awt.GradientPaint", "java.awt.LinearGradientPaint",
-            "java.awt.RadialGradientPaint", "java.Cursor.", "java.util.UUID", "java.net.URL",
+            "java.awt.RadialGradientPaint", "java.awt.Cursor", "java.util.Locale", "java.util.UUID", "java.net.URL",
             "java.net.URI", "java.net.Inet4Address", "java.net.Inet6Address", "java.net.InetSocketAddress",
             "java.security.Permission", "com.google.common.collect.ImmutableBiMap",
             "com.google.common.collect.ImmutableClassToInstanceMap",

spotbugs/src/test/java/edu/umd/cs/findbugs/util/MutableClassesTest.java

@@ -35,6 +35,11 @@ public void TestKnownImmutable() {
         Assert.assertFalse(MutableClasses.mutableSignature("Ljava/lang/String;"));
     }
 
+    @Test
+    public void TestLocale() {
+        Assert.assertFalse(MutableClasses.mutableSignature("Ljava/util/Locale;"));
+    }
+
     @Test
     public void TestArray() {
         Assert.assertTrue(MutableClasses.mutableSignature("[I"));