diff --git a/demos/main/src/main/java/com/google/android/exoplayer2/demo/DemoApplication.java b/demos/main/src/main/java/com/google/android/exoplayer2/demo/DemoApplication.java
index 5d019e4c53..bc2ca738bc 100644
--- a/demos/main/src/main/java/com/google/android/exoplayer2/demo/DemoApplication.java
+++ b/demos/main/src/main/java/com/google/android/exoplayer2/demo/DemoApplication.java
@@ -48,7 +48,7 @@ public class DemoApplication extends Application {
   }
 
   public boolean useExtensionRenderers() {
-    return BuildConfig.FLAVOR.equals("withExtensions");
+    return "withExtensions".equals(BuildConfig.FLAVOR);
   }
 
 }
diff --git a/library/core/src/main/java/com/google/android/exoplayer2/mediacodec/MediaCodecUtil.java b/library/core/src/main/java/com/google/android/exoplayer2/mediacodec/MediaCodecUtil.java
index 7ae8eb3cd4..47ca5cf1cb 100644
--- a/library/core/src/main/java/com/google/android/exoplayer2/mediacodec/MediaCodecUtil.java
+++ b/library/core/src/main/java/com/google/android/exoplayer2/mediacodec/MediaCodecUtil.java
@@ -354,15 +354,15 @@ public final class MediaCodecUtil {
     // Work around https://github.com/google/ExoPlayer/issues/3249.
     if (Util.SDK_INT < 24
         && ("OMX.SEC.aac.dec".equals(name) || "OMX.Exynos.AAC.Decoder".equals(name))
-        && Util.MANUFACTURER.equals("samsung")
+        && "samsung".equals(Util.MANUFACTURER)
         && (Util.DEVICE.startsWith("zeroflte") // Galaxy S6
             || Util.DEVICE.startsWith("zerolte") // Galaxy S6 Edge
             || Util.DEVICE.startsWith("zenlte") // Galaxy S6 Edge+
-            || Util.DEVICE.equals("SC-05G") // Galaxy S6
-            || Util.DEVICE.equals("marinelteatt") // Galaxy S6 Active
-            || Util.DEVICE.equals("404SC") // Galaxy S6 Edge
-            || Util.DEVICE.equals("SC-04G")
-            || Util.DEVICE.equals("SCV31"))) {
+            || "SC-05G".equals(Util.DEVICE) // Galaxy S6
+            || "marinelteatt".equals(Util.DEVICE) // Galaxy S6 Active
+            || "404SC".equals(Util.DEVICE) // Galaxy S6 Edge
+            || "SC-04G".equals(Util.DEVICE)
+            || "SCV31".equals(Util.DEVICE))) {
       return false;
     }
 
@@ -421,7 +421,7 @@ public final class MediaCodecUtil {
    */
   private static boolean codecNeedsDisableAdaptationWorkaround(String name) {
     return Util.SDK_INT <= 22
-        && (Util.MODEL.equals("ODROID-XU3") || Util.MODEL.equals("Nexus 10"))
+        && ("ODROID-XU3".equals(Util.MODEL) || "Nexus 10".equals(Util.MODEL))
         && ("OMX.Exynos.AVC.Decoder".equals(name) || "OMX.Exynos.AVC.Decoder.secure".equals(name));
   }
 
diff --git a/library/core/src/main/java/com/google/android/exoplayer2/metadata/id3/Id3Decoder.java b/library/core/src/main/java/com/google/android/exoplayer2/metadata/id3/Id3Decoder.java
index 6b2e5c3675..5ffb6ccb7e 100644
--- a/library/core/src/main/java/com/google/android/exoplayer2/metadata/id3/Id3Decoder.java
+++ b/library/core/src/main/java/com/google/android/exoplayer2/metadata/id3/Id3Decoder.java
@@ -529,7 +529,7 @@ public final class Id3Decoder implements MetadataDecoder {
     if (majorVersion == 2) {
       mimeTypeEndIndex = 2;
       mimeType = "image/" + Util.toLowerInvariant(new String(data, 0, 3, "ISO-8859-1"));
-      if (mimeType.equals("image/jpg")) {
+      if ("image/jpg".equals(mimeType)) {
         mimeType = "image/jpeg";
       }
     } else {
diff --git a/library/core/src/main/java/com/google/android/exoplayer2/upstream/DefaultHttpDataSource.java b/library/core/src/main/java/com/google/android/exoplayer2/upstream/DefaultHttpDataSource.java
index 599cdddeb9..e8b7f00a56 100644
--- a/library/core/src/main/java/com/google/android/exoplayer2/upstream/DefaultHttpDataSource.java
+++ b/library/core/src/main/java/com/google/android/exoplayer2/upstream/DefaultHttpDataSource.java
@@ -613,9 +613,9 @@ public class DefaultHttpDataSource implements HttpDataSource {
         return;
       }
       String className = inputStream.getClass().getName();
-      if (className.equals("com.android.okhttp.internal.http.HttpTransport$ChunkedInputStream")
-          || className.equals(
-          "com.android.okhttp.internal.http.HttpTransport$FixedLengthInputStream")) {
+      if ("com.android.okhttp.internal.http.HttpTransport$ChunkedInputStream".equals(className)
+          || "com.android.okhttp.internal.http.HttpTransport$FixedLengthInputStream".equals(
+          className)) {
         Class<?> superclass = inputStream.getClass().getSuperclass();
         Method unexpectedEndOfInput = superclass.getDeclaredMethod("unexpectedEndOfInput");
         unexpectedEndOfInput.setAccessible(true);
diff --git a/library/core/src/main/java/com/google/android/exoplayer2/util/Util.java b/library/core/src/main/java/com/google/android/exoplayer2/util/Util.java
index ceefe758bb..a0c5b4a624 100644
--- a/library/core/src/main/java/com/google/android/exoplayer2/util/Util.java
+++ b/library/core/src/main/java/com/google/android/exoplayer2/util/Util.java
@@ -160,7 +160,7 @@ public final class Util {
    */
   public static boolean isLocalFileUri(Uri uri) {
     String scheme = uri.getScheme();
-    return TextUtils.isEmpty(scheme) || scheme.equals("file");
+    return TextUtils.isEmpty(scheme) || "file".equals(scheme);
   }
 
   /**
@@ -629,7 +629,7 @@ public final class Util {
     } else {
       timezoneShift = ((Integer.parseInt(matcher.group(12)) * 60
           + Integer.parseInt(matcher.group(13))));
-      if (matcher.group(11).equals("-")) {
+      if ("-".equals(matcher.group(11))) {
         timezoneShift *= -1;
       }
     }
diff --git a/library/dash/src/main/java/com/google/android/exoplayer2/source/dash/manifest/DashManifestParser.java b/library/dash/src/main/java/com/google/android/exoplayer2/source/dash/manifest/DashManifestParser.java
index bda2a1fb85..ab0a06745f 100644
--- a/library/dash/src/main/java/com/google/android/exoplayer2/source/dash/manifest/DashManifestParser.java
+++ b/library/dash/src/main/java/com/google/android/exoplayer2/source/dash/manifest/DashManifestParser.java
@@ -112,7 +112,7 @@ public class DashManifestParser extends DefaultHandler
     long durationMs = parseDuration(xpp, "mediaPresentationDuration", C.TIME_UNSET);
     long minBufferTimeMs = parseDuration(xpp, "minBufferTime", C.TIME_UNSET);
     String typeString = xpp.getAttributeValue(null, "type");
-    boolean dynamic = typeString != null && typeString.equals("dynamic");
+    boolean dynamic = typeString != null && "dynamic".equals(typeString);
     long minUpdateTimeMs = dynamic ? parseDuration(xpp, "minimumUpdatePeriod", C.TIME_UNSET)
         : C.TIME_UNSET;
     long timeShiftBufferDepthMs = dynamic