diff --git a/common/network-common/src/test/java/org/apache/spark/network/TransportRequestHandlerSuite.java b/common/network-common/src/test/java/org/apache/spark/network/TransportRequestHandlerSuite.java
index 1fb987a8a7aa..1ed57116bc7b 100644
--- a/common/network-common/src/test/java/org/apache/spark/network/TransportRequestHandlerSuite.java
+++ b/common/network-common/src/test/java/org/apache/spark/network/TransportRequestHandlerSuite.java
@@ -105,7 +105,7 @@ private class ExtendedChannelPromise extends DefaultChannelPromise {
     private List<GenericFutureListener> listeners = new ArrayList<>();
     private boolean success;
 
-    public ExtendedChannelPromise(Channel channel) {
+    ExtendedChannelPromise(Channel channel) {
       super(channel);
       success = false;
     }
@@ -127,7 +127,9 @@ public void finish(boolean success) {
       listeners.forEach(listener -> {
         try {
           listener.operationComplete(this);
-        } catch (Exception e) { }
+        } catch (Exception e) {
+          // do nothing
+        }
       });
     }
   }
diff --git a/core/src/main/java/org/apache/spark/shuffle/sort/ShuffleExternalSorter.java b/core/src/main/java/org/apache/spark/shuffle/sort/ShuffleExternalSorter.java
index 338faaadb33d..da6c55d9b8ac 100644
--- a/core/src/main/java/org/apache/spark/shuffle/sort/ShuffleExternalSorter.java
+++ b/core/src/main/java/org/apache/spark/shuffle/sort/ShuffleExternalSorter.java
@@ -120,14 +120,16 @@ final class ShuffleExternalSorter extends MemoryConsumer {
     this.taskContext = taskContext;
     this.numPartitions = numPartitions;
     // Use getSizeAsKb (not bytes) to maintain backwards compatibility if no units are provided
-    this.fileBufferSizeBytes = (int) (long) conf.get(package$.MODULE$.SHUFFLE_FILE_BUFFER_SIZE()) * 1024;
+    this.fileBufferSizeBytes =
+        (int) (long) conf.get(package$.MODULE$.SHUFFLE_FILE_BUFFER_SIZE()) * 1024;
     this.numElementsForSpillThreshold =
       conf.getLong("spark.shuffle.spill.numElementsForceSpillThreshold", 1024 * 1024 * 1024);
     this.writeMetrics = writeMetrics;
     this.inMemSorter = new ShuffleInMemorySorter(
       this, initialSize, conf.getBoolean("spark.shuffle.sort.useRadixSort", true));
     this.peakMemoryUsedBytes = getMemoryUsage();
-    this.diskWriteBufferSize = (int) (long) conf.get(package$.MODULE$.SHUFFLE_DISK_WRITE_BUFFER_SIZE());
+    this.diskWriteBufferSize =
+        (int) (long) conf.get(package$.MODULE$.SHUFFLE_DISK_WRITE_BUFFER_SIZE());
   }
 
   /**
diff --git a/sql/core/src/main/java/org/apache/spark/sql/execution/vectorized/ArrowColumnVector.java b/sql/core/src/main/java/org/apache/spark/sql/execution/vectorized/ArrowColumnVector.java
index 31dea6ad31b1..59d66c599c51 100644
--- a/sql/core/src/main/java/org/apache/spark/sql/execution/vectorized/ArrowColumnVector.java
+++ b/sql/core/src/main/java/org/apache/spark/sql/execution/vectorized/ArrowColumnVector.java
@@ -322,7 +322,7 @@ public ArrowColumnVector(ValueVector vector) {
     anyNullsSet = numNulls > 0;
   }
 
-  private static abstract class ArrowVectorAccessor {
+  private abstract static class ArrowVectorAccessor {
 
     private final ValueVector vector;
     private final ValueVector.Accessor nulls;