Make private static variables final in RandomUtils

Author: garydgregory

src/changes/changes.xml

@@ -86,6 +86,7 @@ The <action> type attribute can be add,update,fix,remove.
     <action                   type="fix" dev="ggregory" due-to="Gary Gregory">Speedup CharSequenceUtils.toCharArray(CharSequence) for String input: ~1-2% improvement (essentially identical).</action>
     <action                   type="fix" dev="ggregory" due-to="Gary Gregory">Streamline StringUtils.truncate(String, int, int).</action>
     <action                   type="fix" dev="ggregory" due-to="Gary Gregory, sekharchowdary774">Fix Javadoc comma spacing #1538.</action>
+    <action issue="LANG-1807" type="fix" dev="ggregory" due-to="Zhongxin Yan, Gary Gregory">Make private static variables final in RandomUtils.</action>
     <!-- ADD -->
     <action                   type="add" dev="ggregory" due-to="Gary Gregory">Add JavaVersion.JAVA_27.</action>
     <action                   type="add" dev="ggregory" due-to="Gary Gregory">Add SystemUtils.IS_JAVA_27.</action>

src/main/java/org/apache/commons/lang3/RandomUtils.java

@@ -70,13 +70,13 @@
  */
 public class RandomUtils {
 
-    private static RandomUtils INSECURE = new RandomUtils(ThreadLocalRandom::current);
+    private static final RandomUtils INSECURE = new RandomUtils(ThreadLocalRandom::current);
 
-    private static RandomUtils SECURE = new RandomUtils(SecureRandom::new);
+    private static final RandomUtils SECURE = new RandomUtils(SecureRandom::new);
 
     private static final Supplier<Random> SECURE_STRONG_SUPPLIER = () -> RandomUtils.SECURE_RANDOM_STRONG.get();
 
-    private static RandomUtils SECURE_STRONG = new RandomUtils(SECURE_STRONG_SUPPLIER);
+    private static final RandomUtils SECURE_STRONG = new RandomUtils(SECURE_STRONG_SUPPLIER);
 
     private static final ThreadLocal<SecureRandom> SECURE_RANDOM_STRONG = ThreadLocal.withInitial(() -> {
         try {