diff --git a/src/changes/changes.xml b/src/changes/changes.xml
index e0c5a8c428..a94fa4a716 100644
--- a/src/changes/changes.xml
+++ b/src/changes/changes.xml
@@ -29,6 +29,7 @@
Deprecate AbstractEmptyIterator.add(E) without replacement.
Add missing Javadocs.
PatriciaTrie constructor reuse the stateless singleton StringKeyAnalyzer.INSTANCE.
+ Deprecate StringKeyAnalyzer.StringKeyAnalyzer() in favor of StringKeyAnalyzer.INSTANCE.
diff --git a/src/main/java/org/apache/commons/collections4/trie/analyzer/StringKeyAnalyzer.java b/src/main/java/org/apache/commons/collections4/trie/analyzer/StringKeyAnalyzer.java
index de490f6069..5c5685c91c 100644
--- a/src/main/java/org/apache/commons/collections4/trie/analyzer/StringKeyAnalyzer.java
+++ b/src/main/java/org/apache/commons/collections4/trie/analyzer/StringKeyAnalyzer.java
@@ -20,7 +20,9 @@
/**
* An {@link KeyAnalyzer} for {@link String}s.
- *
+ *
+ * This class is stateless.
+ *
* @since 4.0
*/
public class StringKeyAnalyzer extends KeyAnalyzer {
@@ -41,6 +43,16 @@ private static int mask(final int bit) {
return MSB >>> bit;
}
+ /**
+ * Constructs a new instance.
+ *
+ * @deprecated Use {@link #INSTANCE}.
+ */
+ @Deprecated
+ public StringKeyAnalyzer() {
+ // empty
+ }
+
@Override
public int bitIndex(final String key, final int offsetInBits, final int lengthInBits,
final String other, final int otherOffsetInBits, final int otherLengthInBits) {