diff --git a/forge-core/src/main/java/forge/deck/CardPool.java b/forge-core/src/main/java/forge/deck/CardPool.java
index 5f1d8518634..b484f31ab98 100644
--- a/forge-core/src/main/java/forge/deck/CardPool.java
+++ b/forge-core/src/main/java/forge/deck/CardPool.java
@@ -27,6 +27,7 @@ import forge.util.ItemPoolSorter;
 import forge.util.MyRandom;
 import org.apache.commons.lang3.StringUtils;
 
+import java.util.Collections;
 import java.util.Iterator;
 import java.util.List;
 import java.util.Map.Entry;
@@ -197,7 +198,7 @@ public class CardPool extends ItemPool<PaperCard> {
 
     public String toCardList(String separator) {
         List<Entry<PaperCard, Integer>> main2sort = Lists.newArrayList(this);
-        main2sort.sort(ItemPoolSorter.BY_NAME_THEN_SET);
+        Collections.sort(main2sort, ItemPoolSorter.BY_NAME_THEN_SET);
         final CardDb commonDb = StaticData.instance().getCommonCards();
         StringBuilder sb = new StringBuilder();
 
diff --git a/forge-core/src/main/java/forge/deck/Deck.java b/forge-core/src/main/java/forge/deck/Deck.java
index 9e8921d78b6..f997a6582a5 100644
--- a/forge-core/src/main/java/forge/deck/Deck.java
+++ b/forge-core/src/main/java/forge/deck/Deck.java
@@ -123,7 +123,7 @@ public class Deck extends DeckBase implements Iterable<Entry<DeckSection, CardPo
             result.add(c.getKey());
         }
         if (result.size() > 1) { //sort by type so signature spell comes after oathbreaker
-            result.sort(new Comparator<PaperCard>() {
+            Collections.sort(result, new Comparator<PaperCard>() {
                 @Override
                 public int compare(final PaperCard c1, final PaperCard c2) {
                     return Boolean.compare(c1.getRules().canBeSignatureSpell(), c2.getRules().canBeSignatureSpell());
diff --git a/forge-core/src/main/java/forge/deck/DeckGroup.java b/forge-core/src/main/java/forge/deck/DeckGroup.java
index 53f22b74d2d..20ef5adc404 100644
--- a/forge-core/src/main/java/forge/deck/DeckGroup.java
+++ b/forge-core/src/main/java/forge/deck/DeckGroup.java
@@ -79,7 +79,7 @@ public class DeckGroup extends DeckBase {
         if (aiDecks.size() < 2) {
             return;
         }
-        aiDecks.sort(comparator);
+        Collections.sort(aiDecks, comparator);
     }
     
     @Override
diff --git a/forge-core/src/main/java/forge/util/collect/FCollection.java b/forge-core/src/main/java/forge/util/collect/FCollection.java
index 4599035c795..709c325e16c 100644
--- a/forge-core/src/main/java/forge/util/collect/FCollection.java
+++ b/forge-core/src/main/java/forge/util/collect/FCollection.java
@@ -506,7 +506,7 @@ public class FCollection<T> implements List<T>, /*Set<T>,*/ FCollectionView<T>,
      * {@inheritDoc}
      */
     public void sort(final Comparator<? super T> comparator) {
-        list.sort(comparator);
+        Collections.sort(list, comparator);
     }
 
     /**
diff --git a/forge-core/src/main/java/forge/util/maps/MapToAmountUtil.java b/forge-core/src/main/java/forge/util/maps/MapToAmountUtil.java
index a0434aeab79..9a60d5d92d3 100644
--- a/forge-core/src/main/java/forge/util/maps/MapToAmountUtil.java
+++ b/forge-core/src/main/java/forge/util/maps/MapToAmountUtil.java
@@ -132,7 +132,7 @@ public final class MapToAmountUtil {
         for (final Entry<T, Integer> entry : map.entrySet()) {
             entries.add(Pair.of(entry.getKey(), entry.getValue()));
         }
-        entries.sort(new Comparator<Entry<T, Integer>>() {
+        Collections.sort(entries, new Comparator<Entry<T, Integer>>() {
             @Override
             public int compare(final Entry<T, Integer> o1, final Entry<T, Integer> o2) {
                 return o1.getValue().compareTo(o2.getValue());
diff --git a/forge-gui-desktop/src/main/java/forge/itemmanager/views/ItemListView.java b/forge-gui-desktop/src/main/java/forge/itemmanager/views/ItemListView.java
index 23dc2860af2..5f13ef658e1 100644
--- a/forge-gui-desktop/src/main/java/forge/itemmanager/views/ItemListView.java
+++ b/forge-gui-desktop/src/main/java/forge/itemmanager/views/ItemListView.java
@@ -35,6 +35,7 @@ import java.awt.event.KeyEvent;
 import java.awt.event.MouseEvent;
 import java.awt.event.MouseMotionAdapter;
 import java.util.ArrayList;
+import java.util.Collections;
 import java.util.Comparator;
 import java.util.Enumeration;
 import java.util.LinkedList;
@@ -164,9 +165,8 @@ public final class ItemListView<T extends InventoryItem> extends ItemView<T> {
                 columns.add(colOverrides.get(colConfig.getDef()));
             }
         }
-        columns.sort(new Comparator<ItemTableColumn>() {
-            @Override
-            public int compare(final ItemTableColumn arg0, final ItemTableColumn arg1) {
+        Collections.sort(columns, new Comparator<ItemTableColumn>() {
+            @Override public int compare(final ItemTableColumn arg0, final ItemTableColumn arg1) {
                 return Integer.compare(arg0.getIndex(), arg1.getIndex());
             }
         });
diff --git a/forge-gui-desktop/src/main/java/forge/screens/home/gauntlet/ContestGauntletLister.java b/forge-gui-desktop/src/main/java/forge/screens/home/gauntlet/ContestGauntletLister.java
index 2dc906c0e61..00a25b1da95 100644
--- a/forge-gui-desktop/src/main/java/forge/screens/home/gauntlet/ContestGauntletLister.java
+++ b/forge-gui-desktop/src/main/java/forge/screens/home/gauntlet/ContestGauntletLister.java
@@ -4,6 +4,7 @@ import java.awt.Color;
 import java.awt.event.MouseAdapter;
 import java.awt.event.MouseEvent;
 import java.util.ArrayList;
+import java.util.Collections;
 import java.util.Comparator;
 import java.util.List;
 
@@ -46,7 +47,7 @@ public class ContestGauntletLister extends JPanel {
         final List<RowPanel> tempRows = new ArrayList<>();
         final List<GauntletData> sorted = new ArrayList<>();
         sorted.addAll(gd0);
-        sorted.sort(new Comparator<GauntletData>() {
+        Collections.sort(sorted, new Comparator<GauntletData>() {
             @Override
             public int compare(final GauntletData x, final GauntletData y) {
                 return x.getName().compareTo(y.getName());
diff --git a/forge-gui-desktop/src/main/java/forge/screens/home/gauntlet/QuickGauntletLister.java b/forge-gui-desktop/src/main/java/forge/screens/home/gauntlet/QuickGauntletLister.java
index 99e47412fb5..6028c92228e 100644
--- a/forge-gui-desktop/src/main/java/forge/screens/home/gauntlet/QuickGauntletLister.java
+++ b/forge-gui-desktop/src/main/java/forge/screens/home/gauntlet/QuickGauntletLister.java
@@ -4,6 +4,7 @@ import java.awt.Color;
 import java.awt.event.MouseEvent;
 import java.io.File;
 import java.util.ArrayList;
+import java.util.Collections;
 import java.util.Comparator;
 import java.util.List;
 
@@ -65,7 +66,7 @@ public class QuickGauntletLister extends JPanel {
         final List<RowPanel> tempRows = new ArrayList<>();
         final List<GauntletData> sorted = new ArrayList<>();
         sorted.addAll(gauntlets);
-        sorted.sort(new Comparator<GauntletData>() {
+        Collections.sort(sorted, new Comparator<GauntletData>() {
             @Override
             public int compare(final GauntletData x, final GauntletData y) {
                 return x.getName().toLowerCase().compareTo(y.getName().toLowerCase());
diff --git a/forge-gui-desktop/src/main/java/forge/screens/home/quest/QuestFileLister.java b/forge-gui-desktop/src/main/java/forge/screens/home/quest/QuestFileLister.java
index 7a650ed9ee4..31d502a48e7 100644
--- a/forge-gui-desktop/src/main/java/forge/screens/home/quest/QuestFileLister.java
+++ b/forge-gui-desktop/src/main/java/forge/screens/home/quest/QuestFileLister.java
@@ -67,7 +67,7 @@ public class QuestFileLister extends JPanel {
         List<RowPanel> tempRows = new ArrayList<>();
         List<QuestData> sorted = new ArrayList<>();
         sorted.addAll(qd0);
-        sorted.sort(new Comparator<QuestData>() {
+        Collections.sort(sorted, new Comparator<QuestData>() {
             @Override
             public int compare(final QuestData x, final QuestData y) {
                 return x.getName().toLowerCase().compareTo(y.getName().toLowerCase());
diff --git a/forge-gui-desktop/src/main/java/forge/view/arcane/FloatingZone.java b/forge-gui-desktop/src/main/java/forge/view/arcane/FloatingZone.java
index 74e6e2e5a5d..4dba33b85f2 100644
--- a/forge-gui-desktop/src/main/java/forge/view/arcane/FloatingZone.java
+++ b/forge-gui-desktop/src/main/java/forge/view/arcane/FloatingZone.java
@@ -19,6 +19,7 @@ package forge.view.arcane;
 
 import java.util.HashMap;
 import java.util.Map;
+import java.util.Collections;
 import java.util.Comparator;
 
 import java.awt.event.MouseEvent;
@@ -126,7 +127,7 @@ public class FloatingZone extends FloatingCardArea {
         if ( zoneCards != null ) {
             cardList = new FCollection<>(zoneCards);
             if ( sortedByName ) {
-                cardList.sort(comp);
+                Collections.sort(cardList, comp);
             }
             return cardList;
         } else {
diff --git a/forge-gui-mobile/src/forge/itemmanager/ItemManager.java b/forge-gui-mobile/src/forge/itemmanager/ItemManager.java
index d2b9a769b79..96c381e1d5b 100644
--- a/forge-gui-mobile/src/forge/itemmanager/ItemManager.java
+++ b/forge-gui-mobile/src/forge/itemmanager/ItemManager.java
@@ -229,7 +229,7 @@ public abstract class ItemManager<T extends InventoryItem> extends FContainer im
                 cols.add(colOverrides.get(colConfig.getDef()));
             }
         }
-        cols.sort(new Comparator<ItemColumn>() {
+        Collections.sort(cols, new Comparator<ItemColumn>() {
             @Override
             public int compare(ItemColumn arg0, ItemColumn arg1) {
                 return Integer.compare(arg0.getConfig().getIndex(), arg1.getConfig().getIndex());
diff --git a/forge-gui-mobile/src/forge/screens/gauntlet/LoadGauntletScreen.java b/forge-gui-mobile/src/forge/screens/gauntlet/LoadGauntletScreen.java
index a8a3cc58e6a..51920794a30 100644
--- a/forge-gui-mobile/src/forge/screens/gauntlet/LoadGauntletScreen.java
+++ b/forge-gui-mobile/src/forge/screens/gauntlet/LoadGauntletScreen.java
@@ -3,6 +3,7 @@ package forge.screens.gauntlet;
 import java.io.File;
 import java.text.NumberFormat;
 import java.util.ArrayList;
+import java.util.Collections;
 import java.util.Comparator;
 import java.util.List;
 import com.badlogic.gdx.utils.Align;
@@ -296,7 +297,7 @@ public class LoadGauntletScreen extends LaunchScreen {
         public void refresh() {
             List<GauntletData> sorted = new ArrayList<>();
             sorted.addAll(gauntlets);
-            sorted.sort(new Comparator<GauntletData>() {
+            Collections.sort(sorted, new Comparator<GauntletData>() {
                 @Override
                 public int compare(final GauntletData x, final GauntletData y) {
                     return x.getName().toLowerCase().compareTo(y.getName().toLowerCase());
diff --git a/forge-gui-mobile/src/forge/screens/planarconquest/LoadConquestScreen.java b/forge-gui-mobile/src/forge/screens/planarconquest/LoadConquestScreen.java
index e11ce520ca0..da8c3d817a2 100644
--- a/forge-gui-mobile/src/forge/screens/planarconquest/LoadConquestScreen.java
+++ b/forge-gui-mobile/src/forge/screens/planarconquest/LoadConquestScreen.java
@@ -2,6 +2,7 @@ package forge.screens.planarconquest;
 
 import java.io.File;
 import java.util.ArrayList;
+import java.util.Collections;
 import java.util.Comparator;
 import java.util.HashMap;
 import java.util.List;
@@ -335,7 +336,7 @@ public class LoadConquestScreen extends LaunchScreen {
         public void setConquests(List<ConquestData> qd0) {
             List<ConquestData> sorted = new ArrayList<>();
             sorted.addAll(qd0);
-            sorted.sort(new Comparator<ConquestData>() {
+            Collections.sort(sorted, new Comparator<ConquestData>() {
                 @Override
                 public int compare(final ConquestData x, final ConquestData y) {
                     return x.getName().toLowerCase().compareTo(y.getName().toLowerCase());
diff --git a/forge-gui-mobile/src/forge/screens/quest/LoadQuestScreen.java b/forge-gui-mobile/src/forge/screens/quest/LoadQuestScreen.java
index 23ccaaf97bf..77867072bb8 100644
--- a/forge-gui-mobile/src/forge/screens/quest/LoadQuestScreen.java
+++ b/forge-gui-mobile/src/forge/screens/quest/LoadQuestScreen.java
@@ -4,6 +4,7 @@ import java.io.File;
 import java.io.FilenameFilter;
 import java.io.IOException;
 import java.util.ArrayList;
+import java.util.Collections;
 import java.util.Comparator;
 import java.util.HashMap;
 import java.util.List;
@@ -336,7 +337,7 @@ public class LoadQuestScreen extends LaunchScreen {
         public void setQuests(List<QuestData> qd0) {
             List<QuestData> sorted = new ArrayList<>();
             sorted.addAll(qd0);
-            sorted.sort(new Comparator<QuestData>() {
+            Collections.sort(sorted, new Comparator<QuestData>() {
                 @Override
                 public int compare(final QuestData x, final QuestData y) {
                     return x.getName().toLowerCase().compareTo(y.getName().toLowerCase());
diff --git a/forge-gui-mobile/src/forge/toolbox/GuiChoose.java b/forge-gui-mobile/src/forge/toolbox/GuiChoose.java
index e8f19f00ad1..9ba376a0b53 100644
--- a/forge-gui-mobile/src/forge/toolbox/GuiChoose.java
+++ b/forge-gui-mobile/src/forge/toolbox/GuiChoose.java
@@ -334,7 +334,7 @@ public class GuiChoose {
     // If comparer is NULL, T has to be comparable. Otherwise you'll get an exception from inside the Arrays.sort() routine
     public static <T> void sortedGetChoices(final String message, final int min, final int max, final List<T> choices, Comparator<T> comparer, final Callback<List<T>> callback) {
         // You may create a copy of source list if callers expect the collection to be unchanged
-        choices.sort(comparer);
+        Collections.sort(choices, comparer);
         getChoices(message, min, max, choices, callback);
     }
 }
diff --git a/forge-gui/src/main/java/forge/itemmanager/AdvancedSearch.java b/forge-gui/src/main/java/forge/itemmanager/AdvancedSearch.java
index 129924ef861..e2b43bc5927 100644
--- a/forge-gui/src/main/java/forge/itemmanager/AdvancedSearch.java
+++ b/forge-gui/src/main/java/forge/itemmanager/AdvancedSearch.java
@@ -209,7 +209,7 @@ public class AdvancedSearch {
                 List<PaperCard> cards = FModel.getMagicDb().getCommonCards().getAllCards(input.getName());
                 if (cards.size() <= 1) { return true; }
 
-                cards.sort(FModel.getMagicDb().getEditions().CARD_EDITION_COMPARATOR);
+                Collections.sort(cards, FModel.getMagicDb().getEditions().CARD_EDITION_COMPARATOR);
                 return cards.get(0) == input;
             }
         }),
diff --git a/forge-gui/src/main/java/forge/itemmanager/ItemManagerModel.java b/forge-gui/src/main/java/forge/itemmanager/ItemManagerModel.java
index cb634c6f120..345647f207e 100644
--- a/forge-gui/src/main/java/forge/itemmanager/ItemManagerModel.java
+++ b/forge-gui/src/main/java/forge/itemmanager/ItemManagerModel.java
@@ -18,6 +18,7 @@
 package forge.itemmanager;
 
 import java.util.ArrayList;
+import java.util.Collections;
 import java.util.Comparator;
 import java.util.List;
 import java.util.Map.Entry;
@@ -124,7 +125,7 @@ public final class ItemManagerModel<T extends InventoryItem> {
     public void refreshSort() {
         if (getOrderedList().isEmpty()) { return; }
 
-        getOrderedList().sort(new MyComparator());
+        Collections.sort(getOrderedList(), new MyComparator());
     }
 
     //Manages sorting orders for multiple depths of sorting
diff --git a/forge-gui/src/main/java/forge/itemmanager/SItemManagerUtil.java b/forge-gui/src/main/java/forge/itemmanager/SItemManagerUtil.java
index eb960d86a2c..af66a90e732 100644
--- a/forge-gui/src/main/java/forge/itemmanager/SItemManagerUtil.java
+++ b/forge-gui/src/main/java/forge/itemmanager/SItemManagerUtil.java
@@ -12,6 +12,7 @@ import forge.util.ComparableOp;
 import forge.util.Localizer;
 
 import java.util.ArrayList;
+import java.util.Collections;
 import java.util.Comparator;
 import java.util.List;
 import java.util.Map.Entry;
@@ -146,7 +147,7 @@ public final class SItemManagerUtil {
         for (final Entry<InventoryItem, Integer> itemEntry : items) {
             sorted.add(itemEntry);
         }
-        sorted.sort(new Comparator<Entry<InventoryItem, Integer>>() {
+        Collections.sort(sorted, new Comparator<Entry<InventoryItem, Integer>>() {
             @Override
             public int compare(final Entry<InventoryItem, Integer> x, final Entry<InventoryItem, Integer> y) {
                 return x.getKey().toString().compareTo(y.getKey().toString());
diff --git a/forge-gui/src/main/java/forge/limited/BoosterDraft.java b/forge-gui/src/main/java/forge/limited/BoosterDraft.java
index f3f58037b5b..09d22dca69e 100644
--- a/forge-gui/src/main/java/forge/limited/BoosterDraft.java
+++ b/forge-gui/src/main/java/forge/limited/BoosterDraft.java
@@ -158,7 +158,7 @@ public class BoosterDraft implements IBoosterDraft {
                 if (myDrafts.isEmpty()) {
                     SOptionPane.showMessageDialog("No custom draft files found.");
                 } else {
-                    myDrafts.sort(new Comparator<CustomLimited>() {
+                    Collections.sort(myDrafts, new Comparator<CustomLimited>() {
                         @Override
                         public int compare(CustomLimited o1, CustomLimited o2) {
                             return o1.getName().compareTo(o2.getName());
diff --git a/forge-gui/src/main/java/forge/limited/CardRanker.java b/forge-gui/src/main/java/forge/limited/CardRanker.java
index 91f12774e2e..13d138f6b9e 100644
--- a/forge-gui/src/main/java/forge/limited/CardRanker.java
+++ b/forge-gui/src/main/java/forge/limited/CardRanker.java
@@ -170,7 +170,7 @@ public class CardRanker {
     }
 
     private static List<PaperCard> sortAndCreateList(List<Pair<Double, PaperCard>> cardScores) {
-        cardScores.sort(Collections.reverseOrder(new CardRankingComparator()));
+        Collections.sort(cardScores, Collections.reverseOrder(new CardRankingComparator()));
 
         List<PaperCard> rankedCards = new ArrayList<>(cardScores.size());
         for (Pair<Double, PaperCard> pair : cardScores) {
diff --git a/forge-gui/src/main/java/forge/match/HostedMatch.java b/forge-gui/src/main/java/forge/match/HostedMatch.java
index fa57ea0a654..5d82270821c 100644
--- a/forge-gui/src/main/java/forge/match/HostedMatch.java
+++ b/forge-gui/src/main/java/forge/match/HostedMatch.java
@@ -1,6 +1,7 @@
 package forge.match;
 
 import java.util.Collection;
+import java.util.Collections;
 import java.util.Comparator;
 import java.util.HashMap;
 import java.util.List;
@@ -108,9 +109,9 @@ public class HostedMatch {
         }
 
         final List<RegisteredPlayer> sortedPlayers = Lists.newArrayList(players);
-        sortedPlayers.sort(new Comparator<RegisteredPlayer>() {
-            @Override
-            public final int compare(final RegisteredPlayer p1, final RegisteredPlayer p2) {
+        Collections.sort(sortedPlayers, new Comparator<RegisteredPlayer>() {
+            @Override public final int compare(final RegisteredPlayer p1, final RegisteredPlayer p2) {
+
                 final int v1 = p1.getPlayer() instanceof LobbyPlayerHuman ? 0 : 1;
                 final int v2 = p2.getPlayer() instanceof LobbyPlayerHuman ? 0 : 1;
                 return Integer.compare(v1, v2);
diff --git a/forge-gui/src/main/java/forge/net/client/GameClientHandler.java b/forge-gui/src/main/java/forge/net/client/GameClientHandler.java
index 60eebcaabfc..30d977378a1 100644
--- a/forge-gui/src/main/java/forge/net/client/GameClientHandler.java
+++ b/forge-gui/src/main/java/forge/net/client/GameClientHandler.java
@@ -206,7 +206,7 @@ final class GameClientHandler extends GameProtocolHandler<IGuiGame> {
         }
 
         final List<RegisteredPlayer> sortedPlayers = Lists.newArrayList(players);
-        sortedPlayers.sort(new Comparator<RegisteredPlayer>() {
+        Collections.sort(sortedPlayers, new Comparator<RegisteredPlayer>() {
             @Override
             public final int compare(final RegisteredPlayer p1, final RegisteredPlayer p2) {
                 final int v1 = p1.getPlayer() instanceof LobbyPlayerHuman ? 0 : 1;
diff --git a/forge-gui/src/main/java/forge/player/PlayerControllerHuman.java b/forge-gui/src/main/java/forge/player/PlayerControllerHuman.java
index eb4dc80fa2f..238a2398837 100644
--- a/forge-gui/src/main/java/forge/player/PlayerControllerHuman.java
+++ b/forge-gui/src/main/java/forge/player/PlayerControllerHuman.java
@@ -1146,7 +1146,7 @@ public class PlayerControllerHuman extends PlayerController implements IGameCont
 
         // create sorted list from map from least to most frequent
         List<Entry<String, Integer>> sortedList = Lists.newArrayList(typesInDeck.entrySet());
-        sortedList.sort(new Comparator<Entry<String, Integer>>() {
+        Collections.sort(sortedList, new Comparator<Entry<String, Integer>>() {
             public int compare(Entry<String, Integer> o1, Entry<String, Integer> o2) {
                 return o1.getValue().compareTo(o2.getValue());
             }
diff --git a/forge-gui/src/main/java/forge/quest/BoosterUtils.java b/forge-gui/src/main/java/forge/quest/BoosterUtils.java
index 43fe9083c46..84d6cb768bd 100644
--- a/forge-gui/src/main/java/forge/quest/BoosterUtils.java
+++ b/forge-gui/src/main/java/forge/quest/BoosterUtils.java
@@ -551,19 +551,19 @@ public final class BoosterUtils {
 
     public static void sort(List<PaperCard> cards) {
         //sort cards alphabetically so colors appear together and rares appear on top
-        cards.sort(new Comparator<PaperCard>() {
+        Collections.sort(cards, new Comparator<PaperCard>() {
             @Override
             public int compare(PaperCard c1, PaperCard c2) {
                 return c1.getName().compareTo(c2.getName());
             }
         });
-        cards.sort(new Comparator<PaperCard>() {
+        Collections.sort(cards, new Comparator<PaperCard>() {
             @Override
             public int compare(PaperCard c1, PaperCard c2) {
                 return c1.getRules().getColor().compareTo(c2.getRules().getColor());
             }
         });
-        cards.sort(new Comparator<PaperCard>() {
+        Collections.sort(cards, new Comparator<PaperCard>() {
             @Override
             public int compare(PaperCard c1, PaperCard c2) {
                 return c2.getRarity().compareTo(c1.getRarity());
diff --git a/forge-gui/src/main/java/forge/quest/QuestEventDraft.java b/forge-gui/src/main/java/forge/quest/QuestEventDraft.java
index 4f58b2f0437..88ff16f4bf6 100644
--- a/forge-gui/src/main/java/forge/quest/QuestEventDraft.java
+++ b/forge-gui/src/main/java/forge/quest/QuestEventDraft.java
@@ -991,7 +991,7 @@ public class QuestEventDraft implements IQuestEvent {
         }
 
         final boolean oldSetsFirst = sets.get(0).getDate().before(FModel.getMagicDb().getEditions().get("SOM").getDate());
-        allowedSets.sort(new Comparator<CardEdition>() {
+        Collections.sort(allowedSets, new Comparator<CardEdition>() {
             @Override
             public int compare(final CardEdition edition1, final CardEdition edition2) {
                 if (edition1.getDate().before(edition2.getDate())) {
diff --git a/forge-gui/src/main/java/forge/quest/QuestUtilUnlockSets.java b/forge-gui/src/main/java/forge/quest/QuestUtilUnlockSets.java
index ffbad1ca8f3..cb2e852554f 100644
--- a/forge-gui/src/main/java/forge/quest/QuestUtilUnlockSets.java
+++ b/forge-gui/src/main/java/forge/quest/QuestUtilUnlockSets.java
@@ -168,7 +168,7 @@ public class QuestUtilUnlockSets {
         }
 
         // sort by distance, then by code desc
-        excludedWithDistances.sort(new Comparator<ImmutablePair<CardEdition, Long>>() {
+        Collections.sort(excludedWithDistances, new Comparator<ImmutablePair<CardEdition, Long>>() {
             @Override
             public int compare(ImmutablePair<CardEdition, Long> o1, ImmutablePair<CardEdition, Long> o2) {
                 long delta = o2.right - o1.right;
diff --git a/forge-gui/src/main/java/forge/tournament/system/AbstractTournament.java b/forge-gui/src/main/java/forge/tournament/system/AbstractTournament.java
index b70a9b526da..e658f3cac29 100644
--- a/forge-gui/src/main/java/forge/tournament/system/AbstractTournament.java
+++ b/forge-gui/src/main/java/forge/tournament/system/AbstractTournament.java
@@ -109,21 +109,21 @@ public abstract class AbstractTournament implements Serializable {
 
     public void sortAllPlayers(String sortType) {
         if (sortType.equals("score")) {
-            allPlayers.sort(new Comparator<TournamentPlayer>() {
+            Collections.sort(allPlayers, new Comparator<TournamentPlayer>() {
                 @Override
                 public int compare(TournamentPlayer o1, TournamentPlayer o2) {
                     return o2.getScore() - o1.getScore();
                 }
             });
         } else if (sortType.equals("index")) {
-            allPlayers.sort(new Comparator<TournamentPlayer>() {
+            Collections.sort(allPlayers, new Comparator<TournamentPlayer>() {
                 @Override
                 public int compare(TournamentPlayer o1, TournamentPlayer o2) {
                     return o2.getIndex() - o1.getIndex();
                 }
             });
         } else if (sortType.equals("swiss")) {
-            allPlayers.sort(new Comparator<TournamentPlayer>() {
+            Collections.sort(allPlayers, new Comparator<TournamentPlayer>() {
                 @Override
                 public int compare(TournamentPlayer o1, TournamentPlayer o2) {
                     return o2.getSwissScore() - o1.getSwissScore();
diff --git a/forge-gui/src/main/java/forge/tournament/system/TournamentSwiss.java b/forge-gui/src/main/java/forge/tournament/system/TournamentSwiss.java
index 1a7df43b495..31c9ae300ff 100644
--- a/forge-gui/src/main/java/forge/tournament/system/TournamentSwiss.java
+++ b/forge-gui/src/main/java/forge/tournament/system/TournamentSwiss.java
@@ -129,7 +129,7 @@ public class TournamentSwiss extends AbstractTournament {
             return pairSwissGroup(players);
         }
 
-        players.sort(new Comparator<TournamentPlayer>() {
+        Collections.sort(players, new Comparator<TournamentPlayer>() {
             @Override
             public int compare(TournamentPlayer o1, TournamentPlayer o2) {
                 return availableOpponents.get(o1).size() - availableOpponents.get(o2).size();