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garydgregory pushed a commit to branch master
in repository https://gitbox.apache.org/repos/asf/commons-imaging.git


The following commit(s) were added to refs/heads/master by this push:
     new 36e56b24 Flip null test
36e56b24 is described below

commit 36e56b24626c36762281a7d83a7529b2491d0937
Author: Gary Gregory <[email protected]>
AuthorDate: Sun Jul 5 09:34:45 2026 -0400

    Flip null test
---
 .../org/apache/commons/imaging/AbstractImageParser.java    |  2 +-
 .../commons/imaging/common/GenericImageMetadata.java       |  4 ++--
 .../apache/commons/imaging/formats/gif/GifImageParser.java |  2 +-
 .../commons/imaging/formats/jpeg/JpegImageMetadata.java    | 10 +++++-----
 .../apache/commons/imaging/formats/tiff/TiffContents.java  |  6 +++---
 .../apache/commons/imaging/formats/tiff/TiffDirectory.java |  7 +++----
 .../commons/imaging/formats/tiff/TiffImageMetadata.java    |  4 ++--
 .../commons/imaging/formats/tiff/TiffImageParser.java      |  4 ++--
 .../apache/commons/imaging/formats/tiff/TiffReader.java    |  2 +-
 .../formats/tiff/write/AbstractTiffImageWriter.java        |  4 ++--
 .../formats/tiff/write/TiffImageWriterLossless.java        |  2 +-
 .../imaging/formats/tiff/write/TiffOutputDirectory.java    | 10 +++++-----
 .../commons/imaging/formats/tiff/write/TiffOutputSet.java  | 10 +++++-----
 .../org/apache/commons/imaging/mylzw/MyLzwCompressor.java  |  8 ++++----
 .../apache/commons/imaging/mylzw/MyLzwDecompressor.java    |  4 ++--
 .../apache/commons/imaging/examples/MetadataExample.java   |  4 ++--
 .../commons/imaging/examples/WriteExifMetadataExample.java | 14 +++++++-------
 .../commons/imaging/examples/tiff/SurveyTiffFile.java      |  4 ++--
 18 files changed, 50 insertions(+), 51 deletions(-)

diff --git a/src/main/java/org/apache/commons/imaging/AbstractImageParser.java 
b/src/main/java/org/apache/commons/imaging/AbstractImageParser.java
index 878ab103..f53365f9 100644
--- a/src/main/java/org/apache/commons/imaging/AbstractImageParser.java
+++ b/src/main/java/org/apache/commons/imaging/AbstractImageParser.java
@@ -339,7 +339,7 @@ public abstract class AbstractImageParser<T extends 
ImagingParameters<T>> extend
 
         final BufferedImageFactory result = params.getBufferedImageFactory();
 
-        if (null != result) {
+        if (result != null) {
             return result;
         }
 
diff --git 
a/src/main/java/org/apache/commons/imaging/common/GenericImageMetadata.java 
b/src/main/java/org/apache/commons/imaging/common/GenericImageMetadata.java
index 215cceed..ab6292ee 100644
--- a/src/main/java/org/apache/commons/imaging/common/GenericImageMetadata.java
+++ b/src/main/java/org/apache/commons/imaging/common/GenericImageMetadata.java
@@ -69,7 +69,7 @@ public class GenericImageMetadata implements ImageMetadata {
         @Override
         public String toString(final String prefix) {
             final String result = keyword + ": " + text;
-            if (null != prefix) {
+            if (prefix != null) {
                 return prefix + result;
             }
             return result;
@@ -127,7 +127,7 @@ public class GenericImageMetadata implements ImageMetadata {
             if (i > 0) {
                 result.append(NEWLINE);
             }
-            // if (null != prefix)
+            // if (prefix != null)
             // result.append(prefix);
 
             final ImageMetadataItem item = items.get(i);
diff --git 
a/src/main/java/org/apache/commons/imaging/formats/gif/GifImageParser.java 
b/src/main/java/org/apache/commons/imaging/formats/gif/GifImageParser.java
index cb8c57a6..d75d5078 100644
--- a/src/main/java/org/apache/commons/imaging/formats/gif/GifImageParser.java
+++ b/src/main/java/org/apache/commons/imaging/formats/gif/GifImageParser.java
@@ -934,7 +934,7 @@ public class GifImageParser extends 
AbstractImageParser<GifImagingParameters> im
                 bos.write((byte) 0); // terminator
             }
 
-            if (null != xmpXml) {
+            if (xmpXml != null) {
                 bos.write(EXTENSION_CODE);
                 bos.write(APPLICATION_EXTENSION_LABEL);
 
diff --git 
a/src/main/java/org/apache/commons/imaging/formats/jpeg/JpegImageMetadata.java 
b/src/main/java/org/apache/commons/imaging/formats/jpeg/JpegImageMetadata.java
index 454b5fd4..6b015e54 100644
--- 
a/src/main/java/org/apache/commons/imaging/formats/jpeg/JpegImageMetadata.java
+++ 
b/src/main/java/org/apache/commons/imaging/formats/jpeg/JpegImageMetadata.java
@@ -117,7 +117,7 @@ public class JpegImageMetadata implements ImageMetadata {
             final TiffImageMetadata.Directory dir = 
(TiffImageMetadata.Directory) d;
             // Debug.debug("dir", dir);
             BufferedImage image = dir.getThumbnail();
-            if (null != image) {
+            if (image != null) {
                 return image;
             }
 
@@ -193,11 +193,11 @@ public class JpegImageMetadata implements ImageMetadata {
     public List<ImageMetadataItem> getItems() {
         final List<ImageMetadataItem> result = new ArrayList<>();
 
-        if (null != exif) {
+        if (exif != null) {
             result.addAll(exif.getItems());
         }
 
-        if (null != photoshop) {
+        if (photoshop != null) {
             result.addAll(photoshop.getItems());
         }
 
@@ -227,7 +227,7 @@ public class JpegImageMetadata implements ImageMetadata {
             final TiffImageMetadata.Directory dir = 
(TiffImageMetadata.Directory) d;
             // Debug.debug("dir", dir);
             final AbstractTiffImageData rawImageData = dir.getTiffImageData();
-            if (null != rawImageData) {
+            if (rawImageData != null) {
                 return rawImageData;
             }
         }
@@ -257,7 +257,7 @@ public class JpegImageMetadata implements ImageMetadata {
             result.append(exif.toString("\t"));
         }
 
-        // if (null != exif && null != photoshop)
+        // if (exif != null && photoshop != null)
         result.append(NEWLINE);
 
         result.append(prefix);
diff --git 
a/src/main/java/org/apache/commons/imaging/formats/tiff/TiffContents.java 
b/src/main/java/org/apache/commons/imaging/formats/tiff/TiffContents.java
index 8588a0ac..72949187 100644
--- a/src/main/java/org/apache/commons/imaging/formats/tiff/TiffContents.java
+++ b/src/main/java/org/apache/commons/imaging/formats/tiff/TiffContents.java
@@ -79,7 +79,7 @@ public class TiffContents {
             Debug.debug("element, start: " + element.offset + ", length: " + 
element.length + ", end: " + (element.offset + element.length) + ": "
                     + element.getElementDescription());
             final String verbosity = element.getElementDescription();
-            if (null != verbosity) {
+            if (verbosity != null) {
                 Debug.debug(verbosity);
             }
 
@@ -99,7 +99,7 @@ public class TiffContents {
     public TiffField findField(final TagInfo tag) throws ImagingException {
         for (final TiffDirectory directory : directories) {
             final TiffField field = directory.findField(tag);
-            if (null != field) {
+            if (field != null) {
                 return field;
             }
         }
@@ -123,7 +123,7 @@ public class TiffContents {
 
             for (final TiffField field : directory) {
                 final AbstractTiffElement oversizeValue = 
field.getOversizeValueElement();
-                if (null != oversizeValue) {
+                if (oversizeValue != null) {
                     result.add(oversizeValue);
                 }
             }
diff --git 
a/src/main/java/org/apache/commons/imaging/formats/tiff/TiffDirectory.java 
b/src/main/java/org/apache/commons/imaging/formats/tiff/TiffDirectory.java
index d09c15ad..eddb4658 100644
--- a/src/main/java/org/apache/commons/imaging/formats/tiff/TiffDirectory.java
+++ b/src/main/java/org/apache/commons/imaging/formats/tiff/TiffDirectory.java
@@ -1071,7 +1071,7 @@ public class TiffDirectory extends AbstractTiffElement 
implements Iterable<TiffF
      * @throws ImagingException if an error occurs.
      */
     public boolean hasJpegImageData() throws ImagingException {
-        return null != 
findField(TiffTagConstants.TIFF_TAG_JPEG_INTERCHANGE_FORMAT);
+        return findField(TiffTagConstants.TIFF_TAG_JPEG_INTERCHANGE_FORMAT) != 
null;
     }
 
     /**
@@ -1096,11 +1096,10 @@ public class TiffDirectory extends AbstractTiffElement 
implements Iterable<TiffF
      * @throws ImagingException if an error occurs.
      */
     public boolean hasTiffImageData() throws ImagingException {
-        if (null != findField(TiffTagConstants.TIFF_TAG_TILE_OFFSETS)) {
+        if (findField(TiffTagConstants.TIFF_TAG_TILE_OFFSETS) != null) {
             return true;
         }
-
-        return null != findField(TiffTagConstants.TIFF_TAG_STRIP_OFFSETS);
+        return findField(TiffTagConstants.TIFF_TAG_STRIP_OFFSETS) != null;
     }
 
     /**
diff --git 
a/src/main/java/org/apache/commons/imaging/formats/tiff/TiffImageMetadata.java 
b/src/main/java/org/apache/commons/imaging/formats/tiff/TiffImageMetadata.java
index 8778c42e..577bea07 100644
--- 
a/src/main/java/org/apache/commons/imaging/formats/tiff/TiffImageMetadata.java
+++ 
b/src/main/java/org/apache/commons/imaging/formats/tiff/TiffImageMetadata.java
@@ -132,7 +132,7 @@ public class TiffImageMetadata extends GenericImageMetadata 
{
                     final TiffMetadataItem item = (TiffMetadataItem) entry;
                     final TiffField srcField = item.getTiffField();
 
-                    if (null != dstDir.findField(srcField.getTag())) {
+                    if (dstDir.findField(srcField.getTag()) != null) {
                         // ignore duplicate tags in a directory.
                         continue;
                     }
@@ -789,7 +789,7 @@ public class TiffImageMetadata extends GenericImageMetadata 
{
         for (final ImageMetadataItem srcDir1 : srcDirs) {
             final Directory srcDir = (Directory) srcDir1;
 
-            if (null != result.findDirectory(srcDir.type)) {
+            if (result.findDirectory(srcDir.type) != null) {
                 // Certain cameras right directories more than once.
                 // This is a bug.
                 // Ignore second directory of a given type.
diff --git 
a/src/main/java/org/apache/commons/imaging/formats/tiff/TiffImageParser.java 
b/src/main/java/org/apache/commons/imaging/formats/tiff/TiffImageParser.java
index aee69127..68637667 100644
--- a/src/main/java/org/apache/commons/imaging/formats/tiff/TiffImageParser.java
+++ b/src/main/java/org/apache/commons/imaging/formats/tiff/TiffImageParser.java
@@ -314,7 +314,7 @@ public class TiffImageParser extends 
AbstractImageParser<TiffImagingParameters>
             // dumpOptionalNumberTag(entries, TIFF_TAG_ORIENTATION);
             // dumpOptionalNumberTag(entries, TIFF_TAG_PLANAR_CONFIGURATION);
             final TiffField predictorField = 
directory.findField(TiffTagConstants.TIFF_TAG_PREDICTOR);
-            if (null != predictorField) {
+            if (predictorField != null) {
                 predictor = predictorField.getIntValueOrArraySum();
             }
         }
@@ -791,7 +791,7 @@ public class TiffImageParser extends 
AbstractImageParser<TiffImagingParameters>
             // dumpOptionalNumberTag(entries, TIFF_TAG_ORIENTATION);
             // dumpOptionalNumberTag(entries, TIFF_TAG_PLANAR_CONFIGURATION);
             final TiffField predictorField = 
directory.findField(TiffTagConstants.TIFF_TAG_PREDICTOR);
-            if (null != predictorField) {
+            if (predictorField != null) {
                 predictor = predictorField.getIntValueOrArraySum();
             }
         }
diff --git 
a/src/main/java/org/apache/commons/imaging/formats/tiff/TiffReader.java 
b/src/main/java/org/apache/commons/imaging/formats/tiff/TiffReader.java
index 8cc8c574..21fbd6ea 100644
--- a/src/main/java/org/apache/commons/imaging/formats/tiff/TiffReader.java
+++ b/src/main/java/org/apache/commons/imaging/formats/tiff/TiffReader.java
@@ -216,7 +216,7 @@ public class TiffReader extends BinaryFileParser {
             //
             int rowsPerStrip = Integer.MAX_VALUE;
 
-            if (null != rowsPerStripField) {
+            if (rowsPerStripField != null) {
                 rowsPerStrip = rowsPerStripField.getIntValue();
             } else {
                 final TiffField imageHeight = 
directory.findField(TiffTagConstants.TIFF_TAG_IMAGE_LENGTH);
diff --git 
a/src/main/java/org/apache/commons/imaging/formats/tiff/write/AbstractTiffImageWriter.java
 
b/src/main/java/org/apache/commons/imaging/formats/tiff/write/AbstractTiffImageWriter.java
index 2014e1c7..ec78aa3b 100644
--- 
a/src/main/java/org/apache/commons/imaging/formats/tiff/write/AbstractTiffImageWriter.java
+++ 
b/src/main/java/org/apache/commons/imaging/formats/tiff/write/AbstractTiffImageWriter.java
@@ -320,7 +320,7 @@ public abstract class AbstractTiffImageWriter {
 
             // set up chain of directory references for "normal" directories.
             final TiffOutputDirectory directory = directoryTypeMap.get(index);
-            if (null != previousDirectory) {
+            if (previousDirectory != null) {
                 previousDirectory.setNextDirectory(directory);
             }
             previousDirectory = directory;
@@ -611,7 +611,7 @@ public abstract class AbstractTiffImageWriter {
             directory.add(TiffTagConstants.TIFF_TAG_T6_OPTIONS, t6Options);
         }
 
-        if (null != xmpXml) {
+        if (xmpXml != null) {
             final byte[] xmpXmlBytes = xmpXml.getBytes(StandardCharsets.UTF_8);
             directory.add(TiffTagConstants.TIFF_TAG_XMP, xmpXmlBytes);
         }
diff --git 
a/src/main/java/org/apache/commons/imaging/formats/tiff/write/TiffImageWriterLossless.java
 
b/src/main/java/org/apache/commons/imaging/formats/tiff/write/TiffImageWriterLossless.java
index cc5faa51..5303f650 100644
--- 
a/src/main/java/org/apache/commons/imaging/formats/tiff/write/TiffImageWriterLossless.java
+++ 
b/src/main/java/org/apache/commons/imaging/formats/tiff/write/TiffImageWriterLossless.java
@@ -154,7 +154,7 @@ public class TiffImageWriterLossless extends 
AbstractTiffImageWriter {
                 }
                 index = lastElementByte;
             }
-            if (null != start) {
+            if (start != null) {
                 rewritableElements.add(new 
AbstractTiffElement.Stub(start.offset, (int) (index - start.offset)));
             }
 
diff --git 
a/src/main/java/org/apache/commons/imaging/formats/tiff/write/TiffOutputDirectory.java
 
b/src/main/java/org/apache/commons/imaging/formats/tiff/write/TiffOutputDirectory.java
index 67ebf716..bd1e8f03 100644
--- 
a/src/main/java/org/apache/commons/imaging/formats/tiff/write/TiffOutputDirectory.java
+++ 
b/src/main/java/org/apache/commons/imaging/formats/tiff/write/TiffOutputDirectory.java
@@ -741,7 +741,7 @@ public final class TiffOutputDirectory extends 
AbstractTiffOutputItem implements
         
removeFieldIfPresent(TiffTagConstants.TIFF_TAG_JPEG_INTERCHANGE_FORMAT_LENGTH);
 
         TiffOutputField jpegOffsetField = null;
-        if (null != jpegImageData) {
+        if (jpegImageData != null) {
             jpegOffsetField = new 
TiffOutputField(TiffTagConstants.TIFF_TAG_JPEG_INTERCHANGE_FORMAT, 
AbstractFieldType.LONG, 1,
                     new byte[ENTRY_MAX_VALUE_LENGTH]);
             add(jpegOffsetField);
@@ -761,7 +761,7 @@ public final class TiffOutputDirectory extends 
AbstractTiffOutputItem implements
 
         final TiffOutputField imageDataOffsetField;
         ImageDataOffsets imageDataInfo = null;
-        if (null != abstractTiffImageData) {
+        if (abstractTiffImageData != null) {
             final boolean stripsNotTiles = 
abstractTiffImageData.stripsNotTiles();
 
             final TagInfo offsetTag;
@@ -808,13 +808,13 @@ public final class TiffOutputDirectory extends 
AbstractTiffOutputItem implements
             // outputSummary.add(item, field);
         }
 
-        if (null != imageDataInfo) {
+        if (imageDataInfo != null) {
             Collections.addAll(result, imageDataInfo.outputItems);
 
             outputSummary.addTiffImageData(imageDataInfo);
         }
 
-        if (null != jpegImageData) {
+        if (jpegImageData != null) {
             final AbstractTiffOutputItem item = new 
AbstractTiffOutputItem.Value("JPEG image data", jpegImageData.getData());
             result.add(item);
             outputSummary.add(item, jpegOffsetField);
@@ -881,7 +881,7 @@ public final class TiffOutputDirectory extends 
AbstractTiffOutputItem implements
 
     private void removeFieldIfPresent(final TagInfo tagInfo) {
         final TiffOutputField field = findField(tagInfo);
-        if (null != field) {
+        if (field != null) {
             fields.remove(field);
         }
     }
diff --git 
a/src/main/java/org/apache/commons/imaging/formats/tiff/write/TiffOutputSet.java
 
b/src/main/java/org/apache/commons/imaging/formats/tiff/write/TiffOutputSet.java
index 8eaf101d..3a593702 100644
--- 
a/src/main/java/org/apache/commons/imaging/formats/tiff/write/TiffOutputSet.java
+++ 
b/src/main/java/org/apache/commons/imaging/formats/tiff/write/TiffOutputSet.java
@@ -67,7 +67,7 @@ public final class TiffOutputSet implements 
Iterable<TiffOutputDirectory> {
      * @throws ImagingException if a directory of that type already exists.
      */
     public void addDirectory(final TiffOutputDirectory directory) throws 
ImagingException {
-        if (null != findDirectory(directory.getType())) {
+        if (findDirectory(directory.getType()) != null) {
             throw new ImagingException("Output set already contains a 
directory of that type.");
         }
         directories.add(directory);
@@ -154,7 +154,7 @@ public final class TiffOutputSet implements 
Iterable<TiffOutputDirectory> {
     public TiffOutputField findField(final int tag) {
         for (final TiffOutputDirectory directory : directories) {
             final TiffOutputField field = directory.findField(tag);
-            if (null != field) {
+            if (field != null) {
                 return field;
             }
         }
@@ -218,7 +218,7 @@ public final class TiffOutputSet implements 
Iterable<TiffOutputDirectory> {
         getOrCreateRootDirectory();
 
         final TiffOutputDirectory result = 
findDirectory(TiffDirectoryConstants.DIRECTORY_TYPE_EXIF);
-        if (null != result) {
+        if (result != null) {
             return result;
         }
         return addExifDirectory();
@@ -235,7 +235,7 @@ public final class TiffOutputSet implements 
Iterable<TiffOutputDirectory> {
         getOrCreateExifDirectory();
 
         final TiffOutputDirectory result = 
findDirectory(TiffDirectoryConstants.DIRECTORY_TYPE_GPS);
-        if (null != result) {
+        if (result != null) {
             return result;
         }
         return addGpsDirectory();
@@ -249,7 +249,7 @@ public final class TiffOutputSet implements 
Iterable<TiffOutputDirectory> {
      */
     public TiffOutputDirectory getOrCreateRootDirectory() throws 
ImagingException {
         final TiffOutputDirectory result = 
findDirectory(TiffDirectoryConstants.DIRECTORY_TYPE_ROOT);
-        if (null != result) {
+        if (result != null) {
             return result;
         }
         return addRootDirectory();
diff --git 
a/src/main/java/org/apache/commons/imaging/mylzw/MyLzwCompressor.java 
b/src/main/java/org/apache/commons/imaging/mylzw/MyLzwCompressor.java
index 30aa9320..95b55ab2 100644
--- a/src/main/java/org/apache/commons/imaging/mylzw/MyLzwCompressor.java
+++ b/src/main/java/org/apache/commons/imaging/mylzw/MyLzwCompressor.java
@@ -166,7 +166,7 @@ public class MyLzwCompressor {
         clearCode = 1 << initialCodeSize;
         eoiCode = clearCode + 1;
 
-        if (null != listener) {
+        if (listener != null) {
             listener.init(clearCode, eoiCode);
         }
 
@@ -293,7 +293,7 @@ public class MyLzwCompressor {
     }
 
     private void writeClearCode(final MyBitOutputStream bos) throws 
IOException {
-        if (null != listener) {
+        if (listener != null) {
             listener.dataCode(clearCode);
         }
         writeCode(bos, clearCode);
@@ -304,14 +304,14 @@ public class MyLzwCompressor {
     }
 
     private void writeDataCode(final MyBitOutputStream bos, final int code) 
throws IOException {
-        if (null != listener) {
+        if (listener != null) {
             listener.dataCode(code);
         }
         writeCode(bos, code);
     }
 
     private void writeEoiCode(final MyBitOutputStream bos) throws IOException {
-        if (null != listener) {
+        if (listener != null) {
             listener.eoiCode(eoiCode);
         }
         writeCode(bos, eoiCode);
diff --git 
a/src/main/java/org/apache/commons/imaging/mylzw/MyLzwDecompressor.java 
b/src/main/java/org/apache/commons/imaging/mylzw/MyLzwDecompressor.java
index 835b6ce5..f4f596b2 100644
--- a/src/main/java/org/apache/commons/imaging/mylzw/MyLzwDecompressor.java
+++ b/src/main/java/org/apache/commons/imaging/mylzw/MyLzwDecompressor.java
@@ -95,7 +95,7 @@ public final class MyLzwDecompressor {
         clearCode = 1 << initialCodeSize;
         eoiCode = clearCode + 1;
 
-        if (null != listener) {
+        if (listener != null) {
             listener.init(clearCode, eoiCode);
         }
 
@@ -192,7 +192,7 @@ public final class MyLzwDecompressor {
     private int getNextCode(final MyBitInputStream is) throws IOException {
         final int code = is.readBits(codeSize);
 
-        if (null != listener) {
+        if (listener != null) {
             listener.code(code);
         }
         return code;
diff --git 
a/src/test/java/org/apache/commons/imaging/examples/MetadataExample.java 
b/src/test/java/org/apache/commons/imaging/examples/MetadataExample.java
index fc05a880..12a00d65 100644
--- a/src/test/java/org/apache/commons/imaging/examples/MetadataExample.java
+++ b/src/test/java/org/apache/commons/imaging/examples/MetadataExample.java
@@ -72,9 +72,9 @@ public class MetadataExample {
 
             // simple interface to GPS data
             final TiffImageMetadata exifMetadata = jpegMetadata.getExif();
-            if (null != exifMetadata) {
+            if (exifMetadata != null) {
                 final TiffImageMetadata.GpsInfo gpsInfo = 
exifMetadata.getGpsInfo();
-                if (null != gpsInfo) {
+                if (gpsInfo != null) {
                     final String gpsDescription = gpsInfo.toString();
                     final double longitude = 
gpsInfo.getLongitudeAsDegreesEast();
                     final double latitude = 
gpsInfo.getLatitudeAsDegreesNorth();
diff --git 
a/src/test/java/org/apache/commons/imaging/examples/WriteExifMetadataExample.java
 
b/src/test/java/org/apache/commons/imaging/examples/WriteExifMetadataExample.java
index 4a4b3749..35f270e6 100644
--- 
a/src/test/java/org/apache/commons/imaging/examples/WriteExifMetadataExample.java
+++ 
b/src/test/java/org/apache/commons/imaging/examples/WriteExifMetadataExample.java
@@ -55,11 +55,11 @@ public class WriteExifMetadataExample {
             // note that metadata might be null if no metadata is found.
             final ImageMetadata metadata = Imaging.getMetadata(jpegImageFile);
             final JpegImageMetadata jpegMetadata = (JpegImageMetadata) 
metadata;
-            if (null != jpegMetadata) {
+            if (jpegMetadata != null) {
                 // note that exif might be null if no Exif metadata is found.
                 final TiffImageMetadata exif = jpegMetadata.getExif();
 
-                if (null != exif) {
+                if (exif != null) {
                     // TiffImageMetadata class is immutable (read-only).
                     // TiffOutputSet class represents the Exif data to write.
                     //
@@ -143,11 +143,11 @@ public class WriteExifMetadataExample {
             // note that metadata might be null if no metadata is found.
             final ImageMetadata metadata = Imaging.getMetadata(jpegImageFile);
             final JpegImageMetadata jpegMetadata = (JpegImageMetadata) 
metadata;
-            if (null != jpegMetadata) {
+            if (jpegMetadata != null) {
                 // note that exif might be null if no Exif metadata is found.
                 final TiffImageMetadata exif = jpegMetadata.getExif();
 
-                if (null != exif) {
+                if (exif != null) {
                     // TiffImageMetadata class is immutable (read-only).
                     // TiffOutputSet class represents the Exif data to write.
                     //
@@ -186,7 +186,7 @@ public class WriteExifMetadataExample {
                 // the constants in ExifTagConstants.java or go to Phil 
Harvey's
                 // EXIF website.
                 final TiffOutputDirectory exifDirectory = 
outputSet.getExifDirectory();
-                if (null != exifDirectory) {
+                if (exifDirectory != null) {
                     
exifDirectory.removeField(ExifTagConstants.EXIF_TAG_APERTURE_VALUE);
                 }
             }
@@ -212,11 +212,11 @@ public class WriteExifMetadataExample {
             // note that metadata might be null if no metadata is found.
             final ImageMetadata metadata = Imaging.getMetadata(jpegImageFile);
             final JpegImageMetadata jpegMetadata = (JpegImageMetadata) 
metadata;
-            if (null != jpegMetadata) {
+            if (jpegMetadata != null) {
                 // note that exif might be null if no Exif metadata is found.
                 final TiffImageMetadata exif = jpegMetadata.getExif();
 
-                if (null != exif) {
+                if (exif != null) {
                     // TiffImageMetadata class is immutable (read-only).
                     // TiffOutputSet class represents the Exif data to write.
                     //
diff --git 
a/src/test/java/org/apache/commons/imaging/examples/tiff/SurveyTiffFile.java 
b/src/test/java/org/apache/commons/imaging/examples/tiff/SurveyTiffFile.java
index 74ae5969..58c95ff1 100644
--- a/src/test/java/org/apache/commons/imaging/examples/tiff/SurveyTiffFile.java
+++ b/src/test/java/org/apache/commons/imaging/examples/tiff/SurveyTiffFile.java
@@ -185,7 +185,7 @@ public class SurveyTiffFile {
         int predictor = -1;
 
         final TiffField predictorField = 
directory.findField(TiffTagConstants.TIFF_TAG_PREDICTOR);
-        if (null != predictorField) {
+        if (predictorField != null) {
             predictor = predictorField.getIntValueOrArraySum();
         }
 
@@ -337,7 +337,7 @@ public class SurveyTiffFile {
             if (imageDataInStrips) {
                 final TiffField rowsPerStripField = 
directory.findField(TiffTagConstants.TIFF_TAG_ROWS_PER_STRIP);
                 rowsPerStrip = Integer.MAX_VALUE;
-                if (null != rowsPerStripField) {
+                if (rowsPerStripField != null) {
                     rowsPerStrip = rowsPerStripField.getIntValue();
                 } else {
                     final TiffField imageHeight = 
directory.findField(TiffTagConstants.TIFF_TAG_IMAGE_LENGTH);

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