diff --git a/core/src/main/java/com/alibaba/fastjson2/JSONWriterPretty.java b/core/src/main/java/com/alibaba/fastjson2/JSONWriterPretty.java
index d7051f9e14..1a091bb3e5 100644
--- a/core/src/main/java/com/alibaba/fastjson2/JSONWriterPretty.java
+++ b/core/src/main/java/com/alibaba/fastjson2/JSONWriterPretty.java
@@ -186,6 +186,7 @@ public void writeRaw(String str) {
         jsonWriter.writeRaw(str);
     }
 
+    @Override
     public byte[] getBytes() {
         return jsonWriter.getBytes();
     }
diff --git a/core/src/main/java/com/alibaba/fastjson2/writer/FieldWriterDate.java b/core/src/main/java/com/alibaba/fastjson2/writer/FieldWriterDate.java
index dca05c1e1e..2403f7f952 100644
--- a/core/src/main/java/com/alibaba/fastjson2/writer/FieldWriterDate.java
+++ b/core/src/main/java/com/alibaba/fastjson2/writer/FieldWriterDate.java
@@ -77,6 +77,7 @@ public DateTimeFormatter getFormatter() {
         return formatter;
     }
 
+    @Override
     public ObjectWriter getObjectWriter(JSONWriter jsonWriter, Class valueClass) {
         if (valueClass == fieldClass) {
             if (dateWriter == null) {
diff --git a/core/src/main/java/com/alibaba/fastjson2/writer/FieldWriterObject.java b/core/src/main/java/com/alibaba/fastjson2/writer/FieldWriterObject.java
index 35ac32c38b..8c06e16761 100644
--- a/core/src/main/java/com/alibaba/fastjson2/writer/FieldWriterObject.java
+++ b/core/src/main/java/com/alibaba/fastjson2/writer/FieldWriterObject.java
@@ -32,6 +32,7 @@ protected FieldWriterObject(String name, int ordinal, long features, String form
                 || fieldClass == AtomicIntegerArray.class;
     }
 
+    @Override
     public boolean unwrapped() {
         return unwrapped;
     }