diff --git a/app/src/main/java/org/schabi/newpipe/DownloaderImpl.java b/app/src/main/java/org/schabi/newpipe/DownloaderImpl.java
index c1c3eb0cd..69bfdfc2a 100644
--- a/app/src/main/java/org/schabi/newpipe/DownloaderImpl.java
+++ b/app/src/main/java/org/schabi/newpipe/DownloaderImpl.java
@@ -114,8 +114,8 @@ public final class DownloaderImpl extends Downloader {
             // Necessary because some servers (e.g. Framatube.org)
             // don't support the old cipher suites.
             // https://github.com/square/okhttp/issues/4053#issuecomment-402579554
-            final List<CipherSuite> cipherSuites = new ArrayList<>();
-            cipherSuites.addAll(ConnectionSpec.MODERN_TLS.cipherSuites());
+            final List<CipherSuite> cipherSuites =
+                    new ArrayList<>(ConnectionSpec.MODERN_TLS.cipherSuites());
             cipherSuites.add(CipherSuite.TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA);
             cipherSuites.add(CipherSuite.TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA);
             final ConnectionSpec legacyTLS = new ConnectionSpec.Builder(ConnectionSpec.MODERN_TLS)
diff --git a/app/src/main/java/org/schabi/newpipe/RouterActivity.java b/app/src/main/java/org/schabi/newpipe/RouterActivity.java
index 482e3d32f..27fa94bef 100644
--- a/app/src/main/java/org/schabi/newpipe/RouterActivity.java
+++ b/app/src/main/java/org/schabi/newpipe/RouterActivity.java
@@ -568,7 +568,7 @@ public class RouterActivity extends AppCompatActivity {
                 }
             }
         }
-        return result.toArray(new String[result.size()]);
+        return result.toArray(new String[0]);
     }
 
     private static class AdapterChoiceItem {
diff --git a/app/src/main/java/org/schabi/newpipe/fragments/detail/VideoDetailFragment.java b/app/src/main/java/org/schabi/newpipe/fragments/detail/VideoDetailFragment.java
index 863c4eb7e..2885c9f7b 100644
--- a/app/src/main/java/org/schabi/newpipe/fragments/detail/VideoDetailFragment.java
+++ b/app/src/main/java/org/schabi/newpipe/fragments/detail/VideoDetailFragment.java
@@ -672,7 +672,8 @@ public class VideoDetailFragment
                 }
                 break;
             case R.id.detail_title_root_layout:
-                ShareUtils.copyToClipboard(requireContext(), videoTitleTextView.getText().toString());
+                ShareUtils.copyToClipboard(requireContext(),
+                        videoTitleTextView.getText().toString());
                 break;
         }
 
diff --git a/app/src/main/java/org/schabi/newpipe/fragments/list/videos/RelatedVideosFragment.java b/app/src/main/java/org/schabi/newpipe/fragments/list/videos/RelatedVideosFragment.java
index 9d1f5acbd..da7e8df8b 100644
--- a/app/src/main/java/org/schabi/newpipe/fragments/list/videos/RelatedVideosFragment.java
+++ b/app/src/main/java/org/schabi/newpipe/fragments/list/videos/RelatedVideosFragment.java
@@ -166,12 +166,10 @@ public class RelatedVideosFragment extends BaseListInfoFragment<RelatedStreamInf
 
     @Override
     public void setTitle(final String title) {
-        return;
     }
 
     @Override
     public void onCreateOptionsMenu(final Menu menu, final MenuInflater inflater) {
-        return;
     }
 
     private void setInitialData(final StreamInfo info) {
diff --git a/app/src/main/java/org/schabi/newpipe/local/subscription/dialog/FeedGroupDialog.kt b/app/src/main/java/org/schabi/newpipe/local/subscription/dialog/FeedGroupDialog.kt
index 80036cd4a..5e9b6b6a4 100644
--- a/app/src/main/java/org/schabi/newpipe/local/subscription/dialog/FeedGroupDialog.kt
+++ b/app/src/main/java/org/schabi/newpipe/local/subscription/dialog/FeedGroupDialog.kt
@@ -252,7 +252,7 @@ class FeedGroupDialog : DialogFragment(), BackPressable {
             }
         })
 
-        subscriptionGroupAdapter?.setOnItemClickListener(subscriptionPickerItemListener)
+        subscriptionGroupAdapter.setOnItemClickListener(subscriptionPickerItemListener)
     }
 
     private fun handlePositiveButton() = when {
diff --git a/app/src/main/java/org/schabi/newpipe/player/resolver/VideoPlaybackResolver.java b/app/src/main/java/org/schabi/newpipe/player/resolver/VideoPlaybackResolver.java
index 814fda4ba..a2b3a1d3d 100644
--- a/app/src/main/java/org/schabi/newpipe/player/resolver/VideoPlaybackResolver.java
+++ b/app/src/main/java/org/schabi/newpipe/player/resolver/VideoPlaybackResolver.java
@@ -115,7 +115,7 @@ public class VideoPlaybackResolver implements PlaybackResolver {
             return mediaSources.get(0);
         } else {
             return new MergingMediaSource(mediaSources.toArray(
-                    new MediaSource[mediaSources.size()]));
+                    new MediaSource[0]));
         }
     }
 
diff --git a/app/src/main/java/org/schabi/newpipe/settings/VideoAudioSettingsFragment.java b/app/src/main/java/org/schabi/newpipe/settings/VideoAudioSettingsFragment.java
index ce6d6dad5..5eca99822 100644
--- a/app/src/main/java/org/schabi/newpipe/settings/VideoAudioSettingsFragment.java
+++ b/app/src/main/java/org/schabi/newpipe/settings/VideoAudioSettingsFragment.java
@@ -87,7 +87,7 @@ public class VideoAudioSettingsFragment extends BasePreferenceFragment {
             }
         }
 
-        final ListPreference durations = (ListPreference) findPreference(
+        final ListPreference durations = findPreference(
                 getString(R.string.seek_duration_key));
         durations.setEntryValues(displayedDurationValues.toArray(new CharSequence[0]));
         durations.setEntries(displayedDescriptionValues.toArray(new CharSequence[0]));
diff --git a/app/src/main/java/org/schabi/newpipe/streams/DataReader.java b/app/src/main/java/org/schabi/newpipe/streams/DataReader.java
index b9d1026f0..dc6e29d7d 100644
--- a/app/src/main/java/org/schabi/newpipe/streams/DataReader.java
+++ b/app/src/main/java/org/schabi/newpipe/streams/DataReader.java
@@ -236,7 +236,7 @@ public class DataReader {
 
         if (read != amount) {
             throw new EOFException("Truncated stream, missing "
-                    + String.valueOf(amount - read) + " bytes");
+                    + (amount - read) + " bytes");
         }
 
         for (int i = 0; i < amount; i++) {
diff --git a/app/src/main/java/org/schabi/newpipe/streams/Mp4DashReader.java b/app/src/main/java/org/schabi/newpipe/streams/Mp4DashReader.java
index 60390946b..e1eb0e9e5 100644
--- a/app/src/main/java/org/schabi/newpipe/streams/Mp4DashReader.java
+++ b/app/src/main/java/org/schabi/newpipe/streams/Mp4DashReader.java
@@ -5,8 +5,8 @@ import org.schabi.newpipe.streams.io.SharpStream;
 import java.io.EOFException;
 import java.io.IOException;
 import java.io.InputStream;
-import java.io.UnsupportedEncodingException;
 import java.nio.ByteBuffer;
+import java.nio.charset.StandardCharsets;
 import java.util.ArrayList;
 import java.util.NoSuchElementException;
 
@@ -259,11 +259,7 @@ public class Mp4DashReader {
     }
 
     private String boxName(final int type) {
-        try {
-            return new String(ByteBuffer.allocate(4).putInt(type).array(), "UTF-8");
-        } catch (final UnsupportedEncodingException e) {
-            return "0x" + Integer.toHexString(type);
-        }
+        return new String(ByteBuffer.allocate(4).putInt(type).array(), StandardCharsets.UTF_8);
     }
 
     private Box readBox() throws IOException {
diff --git a/app/src/main/java/org/schabi/newpipe/streams/WebMReader.java b/app/src/main/java/org/schabi/newpipe/streams/WebMReader.java
index 6e2ba8360..193f89996 100644
--- a/app/src/main/java/org/schabi/newpipe/streams/WebMReader.java
+++ b/app/src/main/java/org/schabi/newpipe/streams/WebMReader.java
@@ -293,7 +293,7 @@ public class WebMReader {
         if (metadataExpected && (obj.info == null || obj.tracks == null)) {
             throw new RuntimeException(
                     "Cluster element found without Info and/or Tracks element at position "
-                            + String.valueOf(ref.offset));
+                            + ref.offset);
         }
 
         return obj;
@@ -389,7 +389,7 @@ public class WebMReader {
 
         final Element elem = untilElement(ref, ID_TIMECODE);
         if (elem == null) {
-            throw new NoSuchElementException("Cluster at " + String.valueOf(ref.offset)
+            throw new NoSuchElementException("Cluster at " + ref.offset
                     + " without Timecode element");
         }
         obj.timecode = readNumber(elem);
@@ -520,7 +520,7 @@ public class WebMReader {
 
                 currentSimpleBlock = readSimpleBlock(elem);
                 if (currentSimpleBlock.trackNumber == tracks[selectedTrack].trackNumber) {
-                    currentSimpleBlock.data = stream.getView((int) currentSimpleBlock.dataSize);
+                    currentSimpleBlock.data = stream.getView(currentSimpleBlock.dataSize);
 
                     // calculate the timestamp in nanoseconds
                     currentSimpleBlock.absoluteTimeCodeNs = currentSimpleBlock.relativeTimeCode
diff --git a/app/src/main/java/org/schabi/newpipe/util/AnimationUtils.java b/app/src/main/java/org/schabi/newpipe/util/AnimationUtils.java
index 4f9053c05..152521018 100644
--- a/app/src/main/java/org/schabi/newpipe/util/AnimationUtils.java
+++ b/app/src/main/java/org/schabi/newpipe/util/AnimationUtils.java
@@ -422,7 +422,7 @@ public final class AnimationUtils {
                                                   final long duration, final long delay,
                                                   final Runnable execOnEnd) {
         if (enterOrExit) {
-            view.setTranslationY(-view.getHeight() / 2);
+            view.setTranslationY(-view.getHeight() / 2.0f);
             view.setAlpha(0f);
             view.animate()
                     .setInterpolator(new FastOutSlowInInterpolator()).alpha(1f).translationY(0)
@@ -437,7 +437,7 @@ public final class AnimationUtils {
             }).start();
         } else {
             view.animate().setInterpolator(new FastOutSlowInInterpolator())
-                    .alpha(0f).translationY(-view.getHeight() / 2)
+                    .alpha(0f).translationY(-view.getHeight() / 2.0f)
                     .setDuration(duration).setStartDelay(delay)
                     .setListener(new AnimatorListenerAdapter() {
                 @Override
diff --git a/app/src/main/java/org/schabi/newpipe/util/RelatedStreamInfo.java b/app/src/main/java/org/schabi/newpipe/util/RelatedStreamInfo.java
index 2526956c5..81e203b1f 100644
--- a/app/src/main/java/org/schabi/newpipe/util/RelatedStreamInfo.java
+++ b/app/src/main/java/org/schabi/newpipe/util/RelatedStreamInfo.java
@@ -20,8 +20,7 @@ public class RelatedStreamInfo extends ListInfo<InfoItem> {
                 info.getOriginalUrl(), info.getUrl(), info.getId(), Collections.emptyList(), null);
         final RelatedStreamInfo relatedStreamInfo = new RelatedStreamInfo(
                 info.getServiceId(), handler, info.getName());
-        final List<InfoItem> streams = new ArrayList<>();
-        streams.addAll(info.getRelatedStreams());
+        final List<InfoItem> streams = new ArrayList<>(info.getRelatedStreams());
         relatedStreamInfo.setRelatedItems(streams);
         return relatedStreamInfo;
     }
diff --git a/app/src/main/java/org/schabi/newpipe/util/TLSSocketFactoryCompat.java b/app/src/main/java/org/schabi/newpipe/util/TLSSocketFactoryCompat.java
index a83e844ea..89dc08f38 100644
--- a/app/src/main/java/org/schabi/newpipe/util/TLSSocketFactoryCompat.java
+++ b/app/src/main/java/org/schabi/newpipe/util/TLSSocketFactoryCompat.java
@@ -106,7 +106,7 @@ public class TLSSocketFactoryCompat extends SSLSocketFactory {
     }
 
     private Socket enableTLSOnSocket(final Socket socket) {
-        if (socket != null && (socket instanceof SSLSocket)) {
+        if (socket instanceof SSLSocket) {
             ((SSLSocket) socket).setEnabledProtocols(new String[]{"TLSv1.1", "TLSv1.2"});
         }
         return socket;
diff --git a/app/src/main/java/us/shandian/giga/get/DownloadMission.java b/app/src/main/java/us/shandian/giga/get/DownloadMission.java
index 3f651d2ee..d7c586083 100644
--- a/app/src/main/java/us/shandian/giga/get/DownloadMission.java
+++ b/app/src/main/java/us/shandian/giga/get/DownloadMission.java
@@ -633,7 +633,7 @@ public class DownloadMission extends Mission {
         calculated = offsets[current < offsets.length ? current : (offsets.length - 1)] + length;
         calculated -= offsets[0];// don't count reserved space
 
-        return calculated > nearLength ? calculated : nearLength;
+        return Math.max(calculated, nearLength);
     }
 
     /**
diff --git a/app/src/main/java/us/shandian/giga/io/FileStream.java b/app/src/main/java/us/shandian/giga/io/FileStream.java
index 2cc4d5db8..bbc56b20c 100644
--- a/app/src/main/java/us/shandian/giga/io/FileStream.java
+++ b/app/src/main/java/us/shandian/giga/io/FileStream.java
@@ -30,12 +30,12 @@ public class FileStream extends SharpStream {
     }
 
     @Override
-    public int read(byte b[]) throws IOException {
+    public int read(byte[] b) throws IOException {
         return source.read(b);
     }
 
     @Override
-    public int read(byte b[], int off, int len) throws IOException {
+    public int read(byte[] b, int off, int len) throws IOException {
         return source.read(b, off, len);
     }
 
diff --git a/app/src/main/java/us/shandian/giga/postprocessing/Postprocessing.java b/app/src/main/java/us/shandian/giga/postprocessing/Postprocessing.java
index 680f484e6..50dbd1c3d 100644
--- a/app/src/main/java/us/shandian/giga/postprocessing/Postprocessing.java
+++ b/app/src/main/java/us/shandian/giga/postprocessing/Postprocessing.java
@@ -115,7 +115,7 @@ public abstract class Postprocessing implements Serializable {
         mission.done = 0;
 
         long length = mission.storage.length() - mission.offsets[0];
-        mission.length = length > mission.nearLength ? length : mission.nearLength;
+        mission.length = Math.max(length, mission.nearLength);
 
         final ProgressReport readProgress = (long position) -> {
             position -= mission.offsets[0];
diff --git a/app/src/main/java/us/shandian/giga/ui/adapter/MissionAdapter.java b/app/src/main/java/us/shandian/giga/ui/adapter/MissionAdapter.java
index d490bcb0f..c9518e477 100644
--- a/app/src/main/java/us/shandian/giga/ui/adapter/MissionAdapter.java
+++ b/app/src/main/java/us/shandian/giga/ui/adapter/MissionAdapter.java
@@ -49,6 +49,7 @@ import java.io.File;
 import java.lang.ref.WeakReference;
 import java.net.URI;
 import java.util.ArrayList;
+import java.util.Arrays;
 import java.util.Iterator;
 
 import us.shandian.giga.get.DownloadMission;
@@ -302,9 +303,7 @@ public class MissionAdapter extends Adapter<ViewHolder> implements Handler.Callb
             float averageSpeed = speed;
 
             if (h.lastSpeedIdx < 0) {
-                for (int i = 0; i < h.lastSpeed.length; i++) {
-                    h.lastSpeed[i] = speed;
-                }
+                Arrays.fill(h.lastSpeed, speed);
                 h.lastSpeedIdx = 0;
             } else {
                 for (int i = 0; i < h.lastSpeed.length; i++) {