diff --git a/app/src/main/java/net/gsantner/markor/format/TextConverterBase.java b/app/src/main/java/net/gsantner/markor/format/TextConverterBase.java
index 946ce4fa20..e8ba5af29a 100644
--- a/app/src/main/java/net/gsantner/markor/format/TextConverterBase.java
+++ b/app/src/main/java/net/gsantner/markor/format/TextConverterBase.java
@@ -124,8 +124,8 @@ public String convertMarkupShowInWebView(Document document, String content, Acti
     /**
      * Convert markup text to target format
      *
-     * @param markup     Markup text
-     * @param context    Android Context
+     * @param markup    Markup text
+     * @param context   Android Context
      * @param lightMode
      * @param lineNum
      * @return html as String
diff --git a/app/src/main/java/net/gsantner/markor/format/wikitext/WikitextTextConverter.java b/app/src/main/java/net/gsantner/markor/format/wikitext/WikitextTextConverter.java
index c0598dec0b..ddee87aca2 100644
--- a/app/src/main/java/net/gsantner/markor/format/wikitext/WikitextTextConverter.java
+++ b/app/src/main/java/net/gsantner/markor/format/wikitext/WikitextTextConverter.java
@@ -35,11 +35,11 @@ public class WikitextTextConverter extends TextConverterBase {
     /**
      * First, convert Wikitext to regular Markor markdown. Then, calls the regular converter.
      *
-     * @param markup     Markup text
-     * @param context    Android Context
-     * @param lightMode  True if the light theme is to apply.
+     * @param markup    Markup text
+     * @param context   Android Context
+     * @param lightMode True if the light theme is to apply.
      * @param lineNum
-     * @param file       The file to convert.
+     * @param file      The file to convert.
      * @return HTML text
      */
     @Override
diff --git a/app/src/main/java/net/gsantner/markor/frontend/textview/TextViewUtils.java b/app/src/main/java/net/gsantner/markor/frontend/textview/TextViewUtils.java
index 0f0724eda0..889d2debf8 100644
--- a/app/src/main/java/net/gsantner/markor/frontend/textview/TextViewUtils.java
+++ b/app/src/main/java/net/gsantner/markor/frontend/textview/TextViewUtils.java
@@ -9,7 +9,6 @@
 #########################################################*/
 package net.gsantner.markor.frontend.textview;
 
-import android.animation.ObjectAnimator;
 import android.content.res.Resources;
 import android.graphics.Rect;
 import android.os.Build;
@@ -216,7 +215,7 @@ public static int[] countChars(final CharSequence s, final char... chars) {
     public static int[] countChars(final CharSequence s, int start, int end, final char... chars) {
         // Faster specialization for the common single case
         if (chars.length == 1) {
-            return new int[] {countChar(s, start, end, chars[0])};
+            return new int[]{countChar(s, start, end, chars[0])};
         }
 
         final int[] counts = new int[chars.length];
diff --git a/app/src/main/java/net/gsantner/opoc/frontend/filebrowser/GsFileBrowserFragment.java b/app/src/main/java/net/gsantner/opoc/frontend/filebrowser/GsFileBrowserFragment.java
index 33e6d029f3..1f67b39615 100644
--- a/app/src/main/java/net/gsantner/opoc/frontend/filebrowser/GsFileBrowserFragment.java
+++ b/app/src/main/java/net/gsantner/opoc/frontend/filebrowser/GsFileBrowserFragment.java
@@ -21,9 +21,7 @@
 import android.app.Activity;
 import android.content.Context;
 import android.graphics.Color;
-import android.os.Build;
 import android.os.Bundle;
-import android.text.TextUtils;
 import android.util.Pair;
 import android.view.Menu;
 import android.view.MenuInflater;
@@ -31,7 +29,6 @@
 import android.view.View;
 import android.widget.TextView;
 import android.widget.Toast;
-import android.widget.Toolbar;
 
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
@@ -47,7 +44,6 @@
 import net.gsantner.markor.frontend.MarkorDialogFactory;
 import net.gsantner.markor.frontend.filebrowser.MarkorFileBrowserFactory;
 import net.gsantner.markor.frontend.filesearch.FileSearchEngine;
-import net.gsantner.markor.frontend.textview.TextViewUtils;
 import net.gsantner.markor.model.AppSettings;
 import net.gsantner.markor.util.MarkorContextUtils;
 import net.gsantner.opoc.frontend.base.GsFragmentBase;
diff --git a/app/src/main/java/net/gsantner/opoc/frontend/filebrowser/GsFileBrowserListAdapter.java b/app/src/main/java/net/gsantner/opoc/frontend/filebrowser/GsFileBrowserListAdapter.java
index c4d2dd3e35..fda4c30e88 100644
--- a/app/src/main/java/net/gsantner/opoc/frontend/filebrowser/GsFileBrowserListAdapter.java
+++ b/app/src/main/java/net/gsantner/opoc/frontend/filebrowser/GsFileBrowserListAdapter.java
@@ -487,8 +487,9 @@ public File createDirectoryHere(final CharSequence name) {
 
     /**
      * Show a file in the current folder and blink it
-     * @param file       File to blink
-     * @param recycler   RecyclerView which holds the file items
+     *
+     * @param file     File to blink
+     * @param recycler RecyclerView which holds the file items
      */
     public void showAndBlink(final File file, final RecyclerView recycler) {
         final int pos = getFilePosition(file);
diff --git a/app/src/main/java/net/gsantner/opoc/frontend/textview/TextViewUndoRedo.java b/app/src/main/java/net/gsantner/opoc/frontend/textview/TextViewUndoRedo.java
index 1c6bab0ecb..f2c9cfc862 100644
--- a/app/src/main/java/net/gsantner/opoc/frontend/textview/TextViewUndoRedo.java
+++ b/app/src/main/java/net/gsantner/opoc/frontend/textview/TextViewUndoRedo.java
@@ -533,8 +533,9 @@ public void afterTextChanged(final Editable s) {
         }
 
         final int CHAR = 0, SPACE = 1, NL = 2;
+
         private int typeOf(final char c) {
-            switch(c) {
+            switch (c) {
                 case '\n':
                     return NL;
                 case ' ':