Remove redundant initializers from WebRTC Java code.

Removes redundant field initializers such as null, 0 and false.

Bug: webrtc:9742
Change-Id: I1e54f6c6000885cf95f7af8e2701875a78445497
Reviewed-on: https://webrtc-review.googlesource.com/99481
Reviewed-by: Henrik Andreassson <henrika@webrtc.org>
Reviewed-by: Artem Titov <titovartem@webrtc.org>
Commit-Queue: Sami Kalliomäki <sakal@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#24676}

examples/androidapp/src/org/appspot/apprtc/AppRTCAudioManager.java

@@ -65,9 +65,9 @@ public class AppRTCAudioManager {
   private AudioManagerEvents audioManagerEvents;
   private AudioManagerState amState;
   private int savedAudioMode = AudioManager.MODE_INVALID;
-  private boolean savedIsSpeakerPhoneOn = false;
+  private boolean savedIsSpeakerPhoneOn;
-  private boolean savedIsMicrophoneMute = false;
+  private boolean savedIsMicrophoneMute;
-  private boolean hasWiredHeadset = false;
+  private boolean hasWiredHeadset;
 
   // Default audio device; speaker phone for video calls or earpiece for audio
   // only calls.
@@ -93,8 +93,7 @@ public class AppRTCAudioManager {
   // relative to the view screen of a device and can therefore be used to
   // assist device switching (close to ear <=> use headset earpiece if
   // available, far from ear <=> use speaker phone).
-  @Nullable
+  @Nullable private AppRTCProximitySensor proximitySensor;
-  private AppRTCProximitySensor proximitySensor = null;
 
   // Handles all tasks related to Bluetooth headset devices.
   private final AppRTCBluetoothManager bluetoothManager;

examples/androidapp/src/org/appspot/apprtc/AppRTCProximitySensor.java

@@ -16,8 +16,8 @@ import android.hardware.SensorEvent;
 import android.hardware.SensorEventListener;
 import android.hardware.SensorManager;
 import android.os.Build;
-import javax.annotation.Nullable;
 import android.util.Log;
+import javax.annotation.Nullable;
 import org.appspot.apprtc.util.AppRTCUtils;
 import org.webrtc.ThreadUtils;
 
@@ -40,9 +40,8 @@ public class AppRTCProximitySensor implements SensorEventListener {
 
   private final Runnable onSensorStateListener;
   private final SensorManager sensorManager;
-  @Nullable
+  @Nullable private Sensor proximitySensor;
-  private Sensor proximitySensor = null;
+  private boolean lastStateReportIsNear;
-  private boolean lastStateReportIsNear = false;
 
   /** Construction */
   static AppRTCProximitySensor create(Context context, Runnable sensorStateListener) {

examples/androidapp/src/org/appspot/apprtc/CallActivity.java

@@ -152,14 +152,12 @@ public class CallActivity extends Activity implements AppRTCClient.SignalingEven
 
   private final ProxyVideoSink remoteProxyRenderer = new ProxyVideoSink();
   private final ProxyVideoSink localProxyVideoSink = new ProxyVideoSink();
-  @Nullable
+  @Nullable private PeerConnectionClient peerConnectionClient;
-  private PeerConnectionClient peerConnectionClient = null;
   @Nullable
   private AppRTCClient appRtcClient;
   @Nullable
   private SignalingParameters signalingParameters;
-  @Nullable
+  @Nullable private AppRTCAudioManager audioManager;
-  private AppRTCAudioManager audioManager = null;
   @Nullable
   private SurfaceViewRenderer pipRenderer;
   @Nullable
@@ -176,9 +174,9 @@ public class CallActivity extends Activity implements AppRTCClient.SignalingEven
   private boolean iceConnected;
   private boolean isError;
   private boolean callControlFragmentVisible = true;
-  private long callStartedTimeMs = 0;
+  private long callStartedTimeMs;
   private boolean micEnabled = true;
-  private boolean screencaptureEnabled = false;
+  private boolean screencaptureEnabled;
   private static Intent mediaProjectionPermissionResultData;
   private static int mediaProjectionPermissionResultCode;
   // True if local view is in the fullscreen renderer.

examples/androidapp/src/org/appspot/apprtc/CaptureQualityController.java

@@ -30,10 +30,10 @@ public class CaptureQualityController implements SeekBar.OnSeekBarChangeListener
   private static final int FRAMERATE_THRESHOLD = 15;
   private TextView captureFormatText;
   private CallFragment.OnCallEvents callEvents;
-  private int width = 0;
+  private int width;
-  private int height = 0;
+  private int height;
-  private int framerate = 0;
+  private int framerate;
-  private double targetBandwidth = 0;
+  private double targetBandwidth;
 
   public CaptureQualityController(
       TextView captureFormatText, CallFragment.OnCallEvents callEvents) {

examples/androidapp/src/org/appspot/apprtc/ConnectActivity.java

@@ -45,7 +45,7 @@ public class ConnectActivity extends Activity {
   private static final String TAG = "ConnectActivity";
   private static final int CONNECTION_REQUEST = 1;
   private static final int REMOVE_FAVORITE_INDEX = 0;
-  private static boolean commandLineRun = false;
+  private static boolean commandLineRun;
 
   private ImageButton addFavoriteButton;
   private EditText roomEditText;

examples/androidapp/src/org/appspot/apprtc/PeerConnectionClient.java

@@ -182,8 +182,7 @@ public class PeerConnectionClient {
   private RtcEventLog rtcEventLog;
   // Implements the WebRtcAudioRecordSamplesReadyCallback interface and writes
   // recorded audio samples to an output file.
-  @Nullable
+  @Nullable private RecordedAudioToFileController saveRecordedAudioToFile;
-  private RecordedAudioToFileController saveRecordedAudioToFile = null;
 
   /**
    * Peer connection parameters.

examples/androidapp/src/org/appspot/apprtc/RecordedAudioToFileController.java

@@ -12,14 +12,14 @@ package org.appspot.apprtc;
 
 import android.media.AudioFormat;
 import android.os.Environment;
-import javax.annotation.Nullable;
 import android.util.Log;
 import java.io.File;
-import java.io.FileOutputStream;
 import java.io.FileNotFoundException;
+import java.io.FileOutputStream;
 import java.io.IOException;
 import java.io.OutputStream;
 import java.util.concurrent.ExecutorService;
+import javax.annotation.Nullable;
 import org.webrtc.audio.JavaAudioDeviceModule;
 import org.webrtc.audio.JavaAudioDeviceModule.SamplesReadyCallback;
 import org.webrtc.voiceengine.WebRtcAudioRecord;
@@ -36,10 +36,9 @@ public class RecordedAudioToFileController
 
   private final Object lock = new Object();
   private final ExecutorService executor;
-  @Nullable
+  @Nullable private OutputStream rawAudioFileOutputStream;
-  private OutputStream rawAudioFileOutputStream = null;
   private boolean isRunning;
-  private long fileSizeInBytes = 0;
+  private long fileSizeInBytes;
 
   public RecordedAudioToFileController(ExecutorService executor) {
     Log.d(TAG, "ctor");

examples/androidtests/src/org/appspot/apprtc/test/PeerConnectionClientTest.java

@@ -88,7 +88,7 @@ public class PeerConnectionClientTest implements PeerConnectionEvents {
   private static class MockSink implements VideoSink {
     // These are protected by 'this' since we gets called from worker threads.
     private String rendererName;
-    private boolean renderFrameCalled = false;
+    private boolean renderFrameCalled;
 
     // Thread-safe in itself.
     private CountDownLatch doneRendering;

modules/audio_device/android/java/src/org/webrtc/voiceengine/WebRtcAudioEffects.java

@@ -41,20 +41,20 @@ public class WebRtcAudioEffects {
   // Contains the available effect descriptors returned from the
   // AudioEffect.getEffects() call. This result is cached to avoid doing the
   // slow OS call multiple times.
-  private static @Nullable Descriptor[] cachedEffects = null;
+  private static @Nullable Descriptor[] cachedEffects;
 
   // Contains the audio effect objects. Created in enable() and destroyed
   // in release().
-  private @Nullable AcousticEchoCanceler aec = null;
+  private @Nullable AcousticEchoCanceler aec;
-  private @Nullable NoiseSuppressor ns = null;
+  private @Nullable NoiseSuppressor ns;
 
   // Affects the final state given to the setEnabled() method on each effect.
   // The default state is set to "disabled" but each effect can also be enabled
   // by calling setAEC() and setNS().
   // To enable an effect, both the shouldEnableXXX member and the static
   // canUseXXX() must be true.
-  private boolean shouldEnableAec = false;
+  private boolean shouldEnableAec;
-  private boolean shouldEnableNs = false;
+  private boolean shouldEnableNs;
 
   // Checks if the device implements Acoustic Echo Cancellation (AEC).
   // Returns true if the device implements AEC, false otherwise.

modules/audio_device/android/java/src/org/webrtc/voiceengine/WebRtcAudioManager.java

@@ -43,11 +43,11 @@ public class WebRtcAudioManager {
   private static final boolean blacklistDeviceForAAudioUsage = true;
 
   // Use mono as default for both audio directions.
-  private static boolean useStereoOutput = false;
+  private static boolean useStereoOutput;
-  private static boolean useStereoInput = false;
+  private static boolean useStereoInput;
 
-  private static boolean blacklistDeviceForOpenSLESUsage = false;
+  private static boolean blacklistDeviceForOpenSLESUsage;
-  private static boolean blacklistDeviceForOpenSLESUsageIsOverridden = false;
+  private static boolean blacklistDeviceForOpenSLESUsageIsOverridden;
 
   // Call this method to override the default list of blacklisted devices
   // specified in WebRtcAudioUtils.BLACKLISTED_OPEN_SL_ES_MODELS.
@@ -151,7 +151,7 @@ public class WebRtcAudioManager {
   private final long nativeAudioManager;
   private final AudioManager audioManager;
 
-  private boolean initialized = false;
+  private boolean initialized;
   private int nativeSampleRate;
   private int nativeChannels;
 

modules/audio_device/android/java/src/org/webrtc/voiceengine/WebRtcAudioRecord.java

@@ -52,14 +52,14 @@ public class WebRtcAudioRecord {
 
   private final long nativeAudioRecord;
 
-  private @Nullable WebRtcAudioEffects effects = null;
+  private @Nullable WebRtcAudioEffects effects;
 
   private ByteBuffer byteBuffer;
 
-  private @Nullable AudioRecord audioRecord = null;
+  private @Nullable AudioRecord audioRecord;
-  private @Nullable AudioRecordThread audioThread = null;
+  private @Nullable AudioRecordThread audioThread;
 
-  private static volatile boolean microphoneMute = false;
+  private static volatile boolean microphoneMute;
   private byte[] emptyBytes;
 
   // Audio recording error handler functions.
@@ -74,7 +74,7 @@ public class WebRtcAudioRecord {
     void onWebRtcAudioRecordError(String errorMessage);
   }
 
-  private static @Nullable WebRtcAudioRecordErrorCallback errorCallback = null;
+  private static @Nullable WebRtcAudioRecordErrorCallback errorCallback;
 
   public static void setErrorCallback(WebRtcAudioRecordErrorCallback errorCallback) {
     Logging.d(TAG, "Set error callback");
@@ -124,7 +124,7 @@ public class WebRtcAudioRecord {
     void onWebRtcAudioRecordSamplesReady(AudioSamples samples);
   }
 
-  private static @Nullable WebRtcAudioRecordSamplesReadyCallback audioSamplesReadyCallback = null;
+  private static @Nullable WebRtcAudioRecordSamplesReadyCallback audioSamplesReadyCallback;
 
   public static void setOnAudioSamplesReady(WebRtcAudioRecordSamplesReadyCallback callback) {
     audioSamplesReadyCallback = callback;

modules/audio_device/android/java/src/org/webrtc/voiceengine/WebRtcAudioTrack.java

@@ -80,12 +80,12 @@ public class WebRtcAudioTrack {
 
   private ByteBuffer byteBuffer;
 
-  private @Nullable AudioTrack audioTrack = null;
+  private @Nullable AudioTrack audioTrack;
-  private @Nullable AudioTrackThread audioThread = null;
+  private @Nullable AudioTrackThread audioThread;
 
   // Samples to be played are replaced by zeros if |speakerMute| is set to true.
   // Can be used to ensure that the speaker is fully muted.
-  private static volatile boolean speakerMute = false;
+  private static volatile boolean speakerMute;
   private byte[] emptyBytes;
 
   // Audio playout/track error handler functions.
@@ -108,8 +108,8 @@ public class WebRtcAudioTrack {
     void onWebRtcAudioTrackError(String errorMessage);
   }
 
-  private static @Nullable WebRtcAudioTrackErrorCallback errorCallbackOld = null;
+  private static @Nullable WebRtcAudioTrackErrorCallback errorCallbackOld;
-  private static @Nullable ErrorCallback errorCallback = null;
+  private static @Nullable ErrorCallback errorCallback;
 
   @Deprecated
   public static void setErrorCallback(WebRtcAudioTrackErrorCallback errorCallback) {

modules/audio_device/android/java/src/org/webrtc/voiceengine/WebRtcAudioUtils.java

@@ -64,12 +64,12 @@ public final class WebRtcAudioUtils {
   private static final int DEFAULT_SAMPLE_RATE_HZ = 16000;
   private static int defaultSampleRateHz = DEFAULT_SAMPLE_RATE_HZ;
   // Set to true if setDefaultSampleRateHz() has been called.
-  private static boolean isDefaultSampleRateOverridden = false;
+  private static boolean isDefaultSampleRateOverridden;
 
   // By default, utilize hardware based audio effects for AEC and NS when
   // available.
-  private static boolean useWebRtcBasedAcousticEchoCanceler = false;
+  private static boolean useWebRtcBasedAcousticEchoCanceler;
-  private static boolean useWebRtcBasedNoiseSuppressor = false;
+  private static boolean useWebRtcBasedNoiseSuppressor;
 
   // Call these methods if any hardware based effect shall be replaced by a
   // software based version provided by the WebRTC stack instead.

sdk/android/api/org/webrtc/DataChannel.java

@@ -22,7 +22,7 @@ public class DataChannel {
     // Optional unsigned short in WebIDL, -1 means unspecified.
     public int maxRetransmits = -1;
     public String protocol = "";
-    public boolean negotiated = false;
+    public boolean negotiated;
     // Optional unsigned short in WebIDL, -1 means unspecified.
     public int id = -1;
 

sdk/android/api/org/webrtc/MediaCodecVideoDecoder.java

@@ -21,9 +21,9 @@ import android.os.SystemClock;
 import android.view.Surface;
 import java.nio.ByteBuffer;
 import java.util.ArrayDeque;
-import java.util.HashMap;
 import java.util.ArrayList;
 import java.util.Arrays;
+import java.util.HashMap;
 import java.util.HashSet;
 import java.util.List;
 import java.util.Queue;
@@ -156,9 +156,9 @@ public class MediaCodecVideoDecoder {
   private static final int MAX_QUEUED_OUTPUTBUFFERS = 3;
   // Active running decoder instance. Set in initDecode() (called from native code)
   // and reset to null in release() call.
-  @Nullable private static MediaCodecVideoDecoder runningInstance = null;
+  @Nullable private static MediaCodecVideoDecoder runningInstance;
-  @Nullable private static MediaCodecVideoDecoderErrorCallback errorCallback = null;
+  @Nullable private static MediaCodecVideoDecoderErrorCallback errorCallback;
-  private static int codecErrors = 0;
+  private static int codecErrors;
   // List of disabled codec types - can be set from application.
   private static Set<String> hwDecoderDisabledTypes = new HashSet<String>();
   @Nullable private static EglBase eglBase;
@@ -228,7 +228,7 @@ public class MediaCodecVideoDecoder {
   // The below variables are only used when decoding to a Surface.
   @Nullable private TextureListener textureListener;
   private int droppedFrames;
-  @Nullable private Surface surface = null;
+  @Nullable private Surface surface;
   private final Queue<DecodedOutputBuffer> dequeuedSurfaceOutputBuffers =
       new ArrayDeque<DecodedOutputBuffer>();
 

sdk/android/api/org/webrtc/MediaCodecVideoEncoder.java

@@ -23,8 +23,8 @@ import android.os.Bundle;
 import android.view.Surface;
 import java.nio.ByteBuffer;
 import java.util.ArrayList;
-import java.util.HashMap;
 import java.util.Arrays;
+import java.util.HashMap;
 import java.util.HashSet;
 import java.util.List;
 import java.util.Set;
@@ -164,9 +164,9 @@ public class MediaCodecVideoEncoder {
 
   // Active running encoder instance. Set in initEncode() (called from native code)
   // and reset to null in release() call.
-  @Nullable private static MediaCodecVideoEncoder runningInstance = null;
+  @Nullable private static MediaCodecVideoEncoder runningInstance;
-  @Nullable private static MediaCodecVideoEncoderErrorCallback errorCallback = null;
+  @Nullable private static MediaCodecVideoEncoderErrorCallback errorCallback;
-  private static int codecErrors = 0;
+  private static int codecErrors;
   // List of disabled codec types - can be set from application.
   private static Set<String> hwEncoderDisabledTypes = new HashSet<String>();
   @Nullable private static EglBase staticEglBase;
@@ -348,7 +348,7 @@ public class MediaCodecVideoEncoder {
   private long lastKeyFrameMs;
 
   // SPS and PPS NALs (Config frame) for H.264.
-  @Nullable private ByteBuffer configData = null;
+  @Nullable private ByteBuffer configData;
 
   // MediaCodec error handler - invoked when critical error happens which may prevent
   // further use of media codec API. Now it means that one of media codec instances

sdk/android/api/org/webrtc/NetworkMonitorAutoDetect.java

@@ -526,7 +526,7 @@ public class NetworkMonitorAutoDetect extends BroadcastReceiver {
     private final Observer observer;
     // Network information about a WifiP2p (aka WiFi-Direct) network, or null if no such network is
     // connected.
-    @Nullable private NetworkInformation wifiP2pNetworkInfo = null;
+    @Nullable private NetworkInformation wifiP2pNetworkInfo;
 
     WifiDirectManagerDelegate(Observer observer, Context context) {
       this.context = context;

sdk/android/api/org/webrtc/PeerConnectionFactory.java

@@ -29,7 +29,7 @@ public class PeerConnectionFactory {
   private static final String VIDEO_CAPTURER_THREAD_NAME = "VideoCapturerThread";
 
   private final long nativeFactory;
-  private static volatile boolean internalTracerInitialized = false;
+  private static volatile boolean internalTracerInitialized;
   @Nullable private static Thread networkThread;
   @Nullable private static Thread workerThread;
   @Nullable private static Thread signalingThread;
@@ -63,11 +63,11 @@ public class PeerConnectionFactory {
     public static class Builder {
       private final Context applicationContext;
       private String fieldTrials = "";
-      private boolean enableInternalTracer = false;
+      private boolean enableInternalTracer;
       private NativeLibraryLoader nativeLibraryLoader = new NativeLibrary.DefaultLoader();
       private String nativeLibraryName = "jingle_peerconnection_so";
-      @Nullable private Loggable loggable = null;
+      @Nullable private Loggable loggable;
-      @Nullable private Severity loggableSeverity = null;
+      @Nullable private Severity loggableSeverity;
 
       Builder(Context applicationContext) {
         this.applicationContext = applicationContext;

sdk/android/api/org/webrtc/ScreenCapturerAndroid.java

@@ -47,9 +47,9 @@ public class ScreenCapturerAndroid implements VideoCapturer, VideoSink {
   @Nullable private VirtualDisplay virtualDisplay;
   @Nullable private SurfaceTextureHelper surfaceTextureHelper;
   @Nullable private CapturerObserver capturerObserver;
-  private long numCapturedFrames = 0;
+  private long numCapturedFrames;
   @Nullable private MediaProjection mediaProjection;
-  private boolean isDisposed = false;
+  private boolean isDisposed;
   @Nullable private MediaProjectionManager mediaProjectionManager;
 
   /**

sdk/android/api/org/webrtc/SurfaceEglRenderer.java

@@ -28,7 +28,7 @@ public class SurfaceEglRenderer extends EglRenderer implements SurfaceHolder.Cal
   private RendererCommon.RendererEvents rendererEvents;
 
   private final Object layoutLock = new Object();
-  private boolean isRenderingPaused = false;
+  private boolean isRenderingPaused;
   private boolean isFirstFrameRendered;
   private int rotatedFrameWidth;
   private int rotatedFrameHeight;

sdk/android/api/org/webrtc/SurfaceTextureHelper.java

@@ -71,9 +71,9 @@ public class SurfaceTextureHelper {
   // These variables are only accessed from the |handler| thread.
   @Nullable private VideoSink listener;
   // The possible states of this class.
-  private boolean hasPendingTexture = false;
+  private boolean hasPendingTexture;
-  private volatile boolean isTextureInUse = false;
+  private volatile boolean isTextureInUse;
-  private boolean isQuitting = false;
+  private boolean isQuitting;
   private int frameRotation;
   private int textureWidth;
   private int textureHeight;

sdk/android/instrumentationtests/src/org/webrtc/CameraVideoCapturerTestFixtures.java

@@ -39,9 +39,9 @@ class CameraVideoCapturerTestFixtures {
 
   static private class RendererCallbacks implements VideoSink {
     private final Object frameLock = new Object();
-    private int framesRendered = 0;
+    private int framesRendered;
-    private int width = 0;
+    private int width;
-    private int height = 0;
+    private int height;
 
     @Override
     public void onFrame(VideoFrame frame) {
@@ -102,7 +102,7 @@ class CameraVideoCapturerTestFixtures {
   }
 
   static private class FakeCapturerObserver implements CapturerObserver {
-    private int framesCaptured = 0;
+    private int framesCaptured;
     private @Nullable VideoFrame videoFrame;
     final private Object frameLock = new Object();
     final private Object capturerStartLock = new Object();

sdk/android/instrumentationtests/src/org/webrtc/HardwareVideoEncoderTest.java

@@ -272,7 +272,7 @@ public class HardwareVideoEncoderTest {
 
   // # Test fields
   private final Object referencedFramesLock = new Object();
-  private int referencedFrames = 0;
+  private int referencedFrames;
 
   private Runnable releaseFrameCallback = new Runnable() {
     @Override

sdk/android/instrumentationtests/src/org/webrtc/NetworkMonitorTest.java

@@ -58,7 +58,7 @@ public class NetworkMonitorTest {
    * Listens for alerts fired by the NetworkMonitor when network status changes.
    */
   private static class NetworkMonitorTestObserver implements NetworkMonitor.NetworkObserver {
-    private boolean receivedNotification = false;
+    private boolean receivedNotification;
 
     @Override
     public void onConnectionTypeChanged(ConnectionType connectionType) {
@@ -159,7 +159,7 @@ public class NetworkMonitorTest {
   }
 
   private static final Object lock = new Object();
-  private static @Nullable Handler uiThreadHandler = null;
+  private static @Nullable Handler uiThreadHandler;
 
   private NetworkMonitorAutoDetect receiver;
   private MockConnectivityManagerDelegate connectivityDelegate;

sdk/android/instrumentationtests/src/org/webrtc/PeerConnectionTest.java

@@ -50,7 +50,7 @@ import org.webrtc.PeerConnection.SignalingState;
 @RunWith(BaseJUnit4ClassRunner.class)
 public class PeerConnectionTest {
   private static final int TIMEOUT_SECONDS = 20;
-  private @Nullable TreeSet<String> threadsBeforeTest = null;
+  private @Nullable TreeSet<String> threadsBeforeTest;
 
   @Before
   public void setUp() {
@@ -64,13 +64,13 @@ public class PeerConnectionTest {
       implements PeerConnection.Observer, VideoSink, DataChannel.Observer, StatsObserver,
                  RTCStatsCollectorCallback, RtpReceiver.Observer {
     private final String name;
-    private int expectedIceCandidates = 0;
+    private int expectedIceCandidates;
-    private int expectedErrors = 0;
+    private int expectedErrors;
-    private int expectedRenegotiations = 0;
+    private int expectedRenegotiations;
-    private int expectedWidth = 0;
+    private int expectedWidth;
-    private int expectedHeight = 0;
+    private int expectedHeight;
-    private int expectedFramesDelivered = 0;
+    private int expectedFramesDelivered;
-    private int expectedTracksAdded = 0;
+    private int expectedTracksAdded;
     private Queue<SignalingState> expectedSignalingChanges = new ArrayDeque<>();
     private Queue<IceConnectionState> expectedIceConnectionChanges = new ArrayDeque<>();
     private Queue<IceGatheringState> expectedIceGatheringChanges = new ArrayDeque<>();
@@ -82,12 +82,12 @@ public class PeerConnectionTest {
     private Queue<DataChannel.Buffer> expectedBuffers = new ArrayDeque<>();
     private Queue<DataChannel.State> expectedStateChanges = new ArrayDeque<>();
     private Queue<String> expectedRemoteDataChannelLabels = new ArrayDeque<>();
-    private int expectedOldStatsCallbacks = 0;
+    private int expectedOldStatsCallbacks;
-    private int expectedNewStatsCallbacks = 0;
+    private int expectedNewStatsCallbacks;
     private List<StatsReport[]> gotStatsReports = new ArrayList<>();
     private final HashSet<MediaStream> gotRemoteStreams = new HashSet<>();
-    private int expectedFirstAudioPacket = 0;
+    private int expectedFirstAudioPacket;
-    private int expectedFirstVideoPacket = 0;
+    private int expectedFirstVideoPacket;
 
     public ObserverExpectations(String name) {
       this.name = name;
@@ -532,9 +532,9 @@ public class PeerConnectionTest {
   }
 
   private static class SdpObserverLatch implements SdpObserver {
-    private boolean success = false;
+    private boolean success;
-    private @Nullable SessionDescription sdp = null;
+    private @Nullable SessionDescription sdp;
-    private @Nullable String error = null;
+    private @Nullable String error;
     private CountDownLatch latch = new CountDownLatch(1);
 
     public SdpObserverLatch() {}
@@ -1444,7 +1444,7 @@ public class PeerConnectionTest {
     final VideoTrack videoTrack = factory.createVideoTrack("video", videoSource);
 
     class FrameCounter implements VideoSink {
-      private int count = 0;
+      private int count;
 
       public int getCount() {
         return count;

sdk/android/src/java/org/webrtc/AndroidVideoDecoder.java

@@ -85,8 +85,8 @@ class AndroidVideoDecoder implements VideoDecoder, VideoSink {
   // caller and must be used to call initDecode, decode, and release.
   private ThreadChecker decoderThreadChecker;
 
-  private volatile boolean running = false;
+  private volatile boolean running;
-  @Nullable private volatile Exception shutdownException = null;
+  @Nullable private volatile Exception shutdownException;
 
   // Dimensions (width, height, stride, and sliceHeight) may be accessed by either the decode thread
   // or the output thread.  Accesses should be protected with this lock.
@@ -107,7 +107,7 @@ class AndroidVideoDecoder implements VideoDecoder, VideoSink {
   private final @Nullable EglBase.Context sharedContext;
   // Valid and immutable while the decoder is running.
   @Nullable private SurfaceTextureHelper surfaceTextureHelper;
-  @Nullable private Surface surface = null;
+  @Nullable private Surface surface;
 
   private static class DecodedTextureMetadata {
     final long presentationTimestampUs;
@@ -128,7 +128,7 @@ class AndroidVideoDecoder implements VideoDecoder, VideoSink {
   @Nullable private Callback callback;
 
   // Valid and immutable while the decoder is running.
-  @Nullable private MediaCodecWrapper codec = null;
+  @Nullable private MediaCodecWrapper codec;
 
   AndroidVideoDecoder(MediaCodecWrapperFactory mediaCodecWrapperFactory, String codecName,
       VideoCodecType codecType, int colorFormat, @Nullable EglBase.Context sharedContext) {

sdk/android/src/java/org/webrtc/BaseBitrateAdjuster.java

@@ -12,8 +12,8 @@ package org.webrtc;
 
 /** BitrateAdjuster that tracks bitrate and framerate but does not adjust them. */
 class BaseBitrateAdjuster implements BitrateAdjuster {
-  protected int targetBitrateBps = 0;
+  protected int targetBitrateBps;
-  protected int targetFps = 0;
+  protected int targetFps;
 
   @Override
   public void setTargets(int targetBitrateBps, int targetFps) {

sdk/android/src/java/org/webrtc/Camera1Session.java

@@ -49,7 +49,7 @@ class Camera1Session implements CameraSession {
   private final long constructionTimeNs; // Construction time of this class.
 
   private SessionState state;
-  private boolean firstFrameReported = false;
+  private boolean firstFrameReported;
 
   // TODO(titovartem) make correct fix during webrtc:9175
   @SuppressWarnings("ByteBufferBackingArray")

sdk/android/src/java/org/webrtc/Camera2Session.java

@@ -71,7 +71,7 @@ class Camera2Session implements CameraSession {
 
   // State
   private SessionState state = SessionState.RUNNING;
-  private boolean firstFrameReported = false;
+  private boolean firstFrameReported;
 
   // Used only for stats. Only used on the camera thread.
   private final long constructionTimeNs; // Construction time of this class.

sdk/android/src/java/org/webrtc/DynamicBitrateAdjuster.java

@@ -26,9 +26,9 @@ class DynamicBitrateAdjuster extends BaseBitrateAdjuster {
   private static final double BITS_PER_BYTE = 8.0;
 
   // How far the codec has deviated above (or below) the target bitrate (tracked in bytes).
-  private double deviationBytes = 0;
+  private double deviationBytes;
-  private double timeSinceLastAdjustmentMs = 0;
+  private double timeSinceLastAdjustmentMs;
-  private int bitrateAdjustmentScaleExp = 0;
+  private int bitrateAdjustmentScaleExp;
 
   @Override
   public void setTargets(int targetBitrateBps, int targetFps) {

sdk/android/src/java/org/webrtc/HardwareVideoEncoder.java

@@ -104,15 +104,15 @@ class HardwareVideoEncoder implements VideoEncoder {
 
   // --- Only accessed on the output thread.
   // Contents of the last observed config frame output by the MediaCodec. Used by H.264.
-  @Nullable private ByteBuffer configBuffer = null;
+  @Nullable private ByteBuffer configBuffer;
   private int adjustedBitrate;
 
   // Whether the encoder is running.  Volatile so that the output thread can watch this value and
   // exit when the encoder stops.
-  private volatile boolean running = false;
+  private volatile boolean running;
   // Any exception thrown during shutdown.  The output thread releases the MediaCodec and uses this
   // value to send exceptions thrown during release back to the encoder thread.
-  @Nullable private volatile Exception shutdownException = null;
+  @Nullable private volatile Exception shutdownException;
 
   /**
    * Creates a new HardwareVideoEncoder with the given codecName, codecType, colorFormat, key frame

sdk/android/src/java/org/webrtc/NativeLibrary.java

@@ -28,7 +28,7 @@ class NativeLibrary {
   }
 
   private static Object lock = new Object();
-  private static boolean libraryLoaded = false;
+  private static boolean libraryLoaded;
 
   /**
    * Loads the native library. Clients should call PeerConnectionFactory.initialize. It will call

sdk/android/src/java/org/webrtc/audio/WebRtcAudioEffects.java

@@ -41,18 +41,18 @@ class WebRtcAudioEffects {
   // Contains the available effect descriptors returned from the
   // AudioEffect.getEffects() call. This result is cached to avoid doing the
   // slow OS call multiple times.
-  private static @Nullable Descriptor[] cachedEffects = null;
+  private static @Nullable Descriptor[] cachedEffects;
 
   // Contains the audio effect objects. Created in enable() and destroyed
   // in release().
-  private @Nullable AcousticEchoCanceler aec = null;
+  private @Nullable AcousticEchoCanceler aec;
-  private @Nullable NoiseSuppressor ns = null;
+  private @Nullable NoiseSuppressor ns;
 
   // Affects the final state given to the setEnabled() method on each effect.
   // The default state is set to "disabled" but each effect can also be enabled
   // by calling setAEC() and setNS().
-  private boolean shouldEnableAec = false;
+  private boolean shouldEnableAec;
-  private boolean shouldEnableNs = false;
+  private boolean shouldEnableNs;
 
   // Returns true if all conditions for supporting HW Acoustic Echo Cancellation (AEC) are
   // fulfilled.

sdk/android/src/java/org/webrtc/audio/WebRtcAudioRecord.java

@@ -63,10 +63,10 @@ class WebRtcAudioRecord {
 
   private @Nullable ByteBuffer byteBuffer;
 
-  private @Nullable AudioRecord audioRecord = null;
+  private @Nullable AudioRecord audioRecord;
-  private @Nullable AudioRecordThread audioThread = null;
+  private @Nullable AudioRecordThread audioThread;
 
-  private volatile boolean microphoneMute = false;
+  private volatile boolean microphoneMute;
   private byte[] emptyBytes;
 
   private final @Nullable AudioRecordErrorCallback errorCallback;

sdk/android/src/java/org/webrtc/audio/WebRtcAudioTrack.java

@@ -21,11 +21,11 @@ import android.os.Process;
 import java.lang.Thread;
 import java.nio.ByteBuffer;
 import javax.annotation.Nullable;
+import org.webrtc.CalledByNative;
 import org.webrtc.Logging;
 import org.webrtc.ThreadUtils;
 import org.webrtc.audio.JavaAudioDeviceModule.AudioTrackErrorCallback;
 import org.webrtc.audio.JavaAudioDeviceModule.AudioTrackStartErrorCode;
-import org.webrtc.CalledByNative;
 
 class WebRtcAudioTrack {
   private static final String TAG = "WebRtcAudioTrackExternal";
@@ -69,13 +69,13 @@ class WebRtcAudioTrack {
 
   private ByteBuffer byteBuffer;
 
-  private @Nullable AudioTrack audioTrack = null;
+  private @Nullable AudioTrack audioTrack;
-  private @Nullable AudioTrackThread audioThread = null;
+  private @Nullable AudioTrackThread audioThread;
   private final VolumeLogger volumeLogger;
 
   // Samples to be played are replaced by zeros if |speakerMute| is set to true.
   // Can be used to ensure that the speaker is fully muted.
-  private volatile boolean speakerMute = false;
+  private volatile boolean speakerMute;
   private byte[] emptyBytes;
 
   private final @Nullable AudioTrackErrorCallback errorCallback;