diff --git a/src/share/classes/java/util/TreeMap.java b/src/share/classes/java/util/TreeMap.java
index 52d9df25a0b218e0e929927c5af951694a333796..9a4681d771a3345081118d166760b8d4ae9ca2dd 100644
--- a/src/share/classes/java/util/TreeMap.java
+++ b/src/share/classes/java/util/TreeMap.java
@@ -972,6 +972,27 @@ public class TreeMap<K,V>
         return tailMap(fromKey, true);
     }
 
+    @Override
+    public boolean replace(K key, V oldValue, V newValue) {
+        Entry<K,V> p = getEntry(key);
+        if (p!=null && Objects.equals(oldValue, p.value)) {
+            p.value = newValue;
+            return true;
+        }
+        return false;
+    }
+
+    @Override
+    public V replace(K key, V value) {
+        Entry<K,V> p = getEntry(key);
+        if (p!=null) {
+            V oldValue = p.value;
+            p.value = value;
+            return oldValue;
+        }
+        return null;
+    }
+
     @Override
     public void forEach(BiConsumer<? super K, ? super V> action) {
         Objects.requireNonNull(action);