diff --git a/src/main/java/carpet/CarpetServer.java b/src/main/java/carpet/CarpetServer.java
index 390e78f0..1e55bc6c 100644
--- a/src/main/java/carpet/CarpetServer.java
+++ b/src/main/java/carpet/CarpetServer.java
@@ -35,7 +35,7 @@ public class CarpetServer // static for now - easier to handle all around the co
     private static CommandDispatcher<ServerCommandSource> currentCommandDispatcher;
     public static CarpetScriptServer scriptServer;
     public static SettingsManager settingsManager;
-    public static List<CarpetExtension> extensions = new ArrayList<>();
+    public static final List<CarpetExtension> extensions = new ArrayList<>();
 
     // Separate from onServerLoaded, because a server can be loaded multiple times in singleplayer
     public static void manageExtension(CarpetExtension extension)
diff --git a/src/main/java/carpet/CarpetSettings.java b/src/main/java/carpet/CarpetSettings.java
index 4c31fe5f..c6cb9f4d 100644
--- a/src/main/java/carpet/CarpetSettings.java
+++ b/src/main/java/carpet/CarpetSettings.java
@@ -29,6 +29,7 @@ import static carpet.settings.RuleCategory.SURVIVAL;
 import static carpet.settings.RuleCategory.TNT;
 import static carpet.settings.RuleCategory.DISPENSER;
 
+@SuppressWarnings("CanBeFinal")
 public class CarpetSettings
 {
     public static final String carpetVersion = "1.3.3+v200105";
diff --git a/src/main/java/carpet/fakes/MinecraftClientInferface.java b/src/main/java/carpet/fakes/MinecraftClientInferface.java
index a96303ee..6e200c7f 100644
--- a/src/main/java/carpet/fakes/MinecraftClientInferface.java
+++ b/src/main/java/carpet/fakes/MinecraftClientInferface.java
@@ -2,5 +2,5 @@ package carpet.fakes;
 
 public interface MinecraftClientInferface
 {
-    public float getPausedTickDelta();
+    float getPausedTickDelta();
 }
diff --git a/src/main/java/carpet/fakes/MobEntityInterface.java b/src/main/java/carpet/fakes/MobEntityInterface.java
index ddab20fc..290e5304 100644
--- a/src/main/java/carpet/fakes/MobEntityInterface.java
+++ b/src/main/java/carpet/fakes/MobEntityInterface.java
@@ -7,7 +7,7 @@ import java.util.Map;
 
 public interface MobEntityInterface
 {
-    public GoalSelector getAI(boolean target);
+    GoalSelector getAI(boolean target);
 
-    public Map<String, Goal> getTemporaryTasks();
+    Map<String, Goal> getTemporaryTasks();
 }
diff --git a/src/main/java/carpet/fakes/StructureFeatureInterface.java b/src/main/java/carpet/fakes/StructureFeatureInterface.java
index f1180709..410f5055 100644
--- a/src/main/java/carpet/fakes/StructureFeatureInterface.java
+++ b/src/main/java/carpet/fakes/StructureFeatureInterface.java
@@ -7,6 +7,6 @@ import net.minecraft.world.gen.chunk.ChunkGeneratorConfig;
 
 public interface StructureFeatureInterface
 {
-    public boolean plopAnywhere(IWorld world, BlockPos pos);
-    public boolean plopAnywhere(IWorld world, BlockPos pos, ChunkGenerator<? extends ChunkGeneratorConfig> generator);
+    boolean plopAnywhere(IWorld world, BlockPos pos);
+    boolean plopAnywhere(IWorld world, BlockPos pos, ChunkGenerator<? extends ChunkGeneratorConfig> generator);
 }
diff --git a/src/main/java/carpet/helpers/EntityPlayerActionPack.java b/src/main/java/carpet/helpers/EntityPlayerActionPack.java
index 9222d0b3..346de1f4 100644
--- a/src/main/java/carpet/helpers/EntityPlayerActionPack.java
+++ b/src/main/java/carpet/helpers/EntityPlayerActionPack.java
@@ -25,9 +25,9 @@ import java.util.TreeMap;
 
 public class EntityPlayerActionPack
 {
-    private ServerPlayerEntity player;
+    private final ServerPlayerEntity player;
 
-    private Map<ActionType, Action> actions = new TreeMap<>();
+    private final Map<ActionType, Action> actions = new TreeMap<>();
 
     private BlockPos currentBlock;
     private int blockHitDelay;
diff --git a/src/main/java/carpet/helpers/FeatureGenerator.java b/src/main/java/carpet/helpers/FeatureGenerator.java
index 8f542373..87c76e52 100644
--- a/src/main/java/carpet/helpers/FeatureGenerator.java
+++ b/src/main/java/carpet/helpers/FeatureGenerator.java
@@ -95,7 +95,7 @@ public class FeatureGenerator
         return null;
     }
 
-    private static Map<String, Thing> featureMap = new HashMap<String, Thing>() {{
+    private static final Map<String, Thing> featureMap = new HashMap<String, Thing>() {{
 
 
         put("oak", simplePlop(Feature.NORMAL_TREE));
diff --git a/src/main/java/carpet/helpers/OptimizedExplosion.java b/src/main/java/carpet/helpers/OptimizedExplosion.java
index 5e0184dd..66ae7a05 100644
--- a/src/main/java/carpet/helpers/OptimizedExplosion.java
+++ b/src/main/java/carpet/helpers/OptimizedExplosion.java
@@ -333,7 +333,7 @@ public class OptimizedExplosion
 
     private static void getAffectedPositionsOnPlaneX(Explosion e, int x, int yStart, int yEnd, int zStart, int zEnd)
     {
-        if (rayCalcDone == false)
+        if (!rayCalcDone)
         {
             final double xRel = (double) x / 15.0D * 2.0D - 1.0D;
 
@@ -356,7 +356,7 @@ public class OptimizedExplosion
 
     private static void getAffectedPositionsOnPlaneY(Explosion e, int y, int xStart, int xEnd, int zStart, int zEnd)
     {
-        if (rayCalcDone == false)
+        if (!rayCalcDone)
         {
             final double yRel = (double) y / 15.0D * 2.0D - 1.0D;
 
@@ -379,7 +379,7 @@ public class OptimizedExplosion
 
     private static void getAffectedPositionsOnPlaneZ(Explosion e, int z, int xStart, int xEnd, int yStart, int yEnd)
     {
-        if (rayCalcDone == false)
+        if (!rayCalcDone)
         {
             final double zRel = (double) z / 15.0D * 2.0D - 1.0D;
 
diff --git a/src/main/java/carpet/helpers/PortalHelper.java b/src/main/java/carpet/helpers/PortalHelper.java
index 2cba9115..baae0f66 100644
--- a/src/main/java/carpet/helpers/PortalHelper.java
+++ b/src/main/java/carpet/helpers/PortalHelper.java
@@ -8,12 +8,8 @@ public class PortalHelper
 {
     public static boolean player_holds_obsidian(PlayerEntity playerIn)
     {
-        if ( (!playerIn.getMainHandStack().isEmpty()
-            && playerIn.getMainHandStack().getItem() instanceof BlockItem &&
-            ((BlockItem)(playerIn.getMainHandStack().getItem())).getBlock() == Blocks.OBSIDIAN   ))
-        {
-            return true;
-        }
-        return false;
+        return (!playerIn.getMainHandStack().isEmpty()
+                && playerIn.getMainHandStack().getItem() instanceof BlockItem &&
+                ((BlockItem) (playerIn.getMainHandStack().getItem())).getBlock() == Blocks.OBSIDIAN);
     }
 }
diff --git a/src/main/java/carpet/helpers/RedstoneWireTurbo.java b/src/main/java/carpet/helpers/RedstoneWireTurbo.java
index f44da166..b7bb9754 100644
--- a/src/main/java/carpet/helpers/RedstoneWireTurbo.java
+++ b/src/main/java/carpet/helpers/RedstoneWireTurbo.java
@@ -193,7 +193,7 @@ public class RedstoneWireTurbo
     private static final int West = 3;
  
     // Names for debug print statements
-    private static final char dirname[] = {'N', 'E', 'S', 'W'};
+    private static final char[] dirname = {'N', 'E', 'S', 'W'};
  
     /* 
      * These lookup tables completely remap neighbor positions into a left-to-right
@@ -269,7 +269,7 @@ public class RedstoneWireTurbo
      * neighbors that will receive updates.
      */
     private static class UpdateNode {
-        public static enum Type {
+        public enum Type {
             UNKNOWN, REDSTONE, OTHER
         }
          
diff --git a/src/main/java/carpet/mixins/DesertPyramidFeatureMixin.java b/src/main/java/carpet/mixins/DesertPyramidFeatureMixin.java
index 1ea4ab23..98ea4d32 100644
--- a/src/main/java/carpet/mixins/DesertPyramidFeatureMixin.java
+++ b/src/main/java/carpet/mixins/DesertPyramidFeatureMixin.java
@@ -21,7 +21,7 @@ public abstract class DesertPyramidFeatureMixin extends AbstractTempleFeature<De
     
     static
     {
-        MONSTER_SPAWNS = Lists.newArrayList(new Biome.SpawnEntry[]{new Biome.SpawnEntry(EntityType.HUSK, 1, 1, 1)});
+        MONSTER_SPAWNS = Lists.newArrayList(new Biome.SpawnEntry(EntityType.HUSK, 1, 1, 1));
     }
     
     public DesertPyramidFeatureMixin(Function<Dynamic<?>, ? extends DefaultFeatureConfig> function_1)
diff --git a/src/main/java/carpet/mixins/Entity_scarpetEventsMixin.java b/src/main/java/carpet/mixins/Entity_scarpetEventsMixin.java
index c6306a9a..ca6a4576 100644
--- a/src/main/java/carpet/mixins/Entity_scarpetEventsMixin.java
+++ b/src/main/java/carpet/mixins/Entity_scarpetEventsMixin.java
@@ -14,7 +14,7 @@ public abstract class Entity_scarpetEventsMixin implements EntityInterface
 {
     @Shadow public boolean removed;
 
-    private EntityEventsGroup events = new EntityEventsGroup();
+    private final EntityEventsGroup events = new EntityEventsGroup();
 
     @Override
     public EntityEventsGroup getEventContainer()
diff --git a/src/main/java/carpet/mixins/PistonBlock_movableTEMixin.java b/src/main/java/carpet/mixins/PistonBlock_movableTEMixin.java
index 0b85b5ef..63e2bff0 100644
--- a/src/main/java/carpet/mixins/PistonBlock_movableTEMixin.java
+++ b/src/main/java/carpet/mixins/PistonBlock_movableTEMixin.java
@@ -77,14 +77,14 @@ public abstract class PistonBlock_movableTEMixin extends FacingBlock
     @Inject(method = "move", at = @At(value = "INVOKE", shift = At.Shift.BEFORE,
             target = "Ljava/util/List;size()I", ordinal = 4),locals = LocalCapture.CAPTURE_FAILHARD)
     private void onMove(World world_1, BlockPos blockPos_1, Direction direction_1, boolean boolean_1,
-            CallbackInfoReturnable<Boolean> cir, BlockPos blockPos_2, PistonHandler pistonHandler_1,
-            List<BlockPos> list_1, List<BlockState> list_2, List list_3, int int_2, BlockState blockStates_1[],
-            Direction direction_2, Set set_1)
+                        CallbackInfoReturnable<Boolean> cir, BlockPos blockPos_2, PistonHandler pistonHandler_1,
+                        List<BlockPos> list_1, List<BlockState> list_2, List list_3, int int_2, BlockState[] blockStates_1,
+                        Direction direction_2, Set set_1)
     {
         //Get the blockEntities and remove them from the world before any magic starts to happen
         if (CarpetSettings.movableBlockEntities)
         {
-            list1_BlockEntities.set(Lists.<BlockEntity>newArrayList());
+            list1_BlockEntities.set(Lists.newArrayList());
             for (int i = 0; i < list_1.size(); ++i)
             {
                 BlockPos blockpos = list_1.get(i);
@@ -106,9 +106,9 @@ public abstract class PistonBlock_movableTEMixin extends FacingBlock
                              "Lnet/minecraft/block/entity/BlockEntity;)V", ordinal = 0),
             locals = LocalCapture.CAPTURE_FAILHARD)
     private void setBlockEntityWithCarried(World world_1, BlockPos blockPos_1, Direction direction_1, boolean boolean_1,
-            CallbackInfoReturnable<Boolean> cir, BlockPos blockPos_2, PistonHandler pistonHandler_1, List list_1,
-            List list_2, List list_3, int int_2, BlockState blockStates_1[], Direction direction_2, Set set_1,
-            int int_3, BlockPos blockPos_4, BlockState blockState_1)
+                                           CallbackInfoReturnable<Boolean> cir, BlockPos blockPos_2, PistonHandler pistonHandler_1, List list_1,
+                                           List list_2, List list_3, int int_2, BlockState[] blockStates_1, Direction direction_2, Set set_1,
+                                           int int_3, BlockPos blockPos_4, BlockState blockState_1)
     {
         BlockEntity blockEntityPiston = PistonExtensionBlock.createBlockEntityPiston((BlockState) list_2.get(int_3),
                 direction_1, boolean_1, false);
diff --git a/src/main/java/carpet/mixins/PlayerManagerMixin.java b/src/main/java/carpet/mixins/PlayerManagerMixin.java
index d6f9a64d..46864b4c 100644
--- a/src/main/java/carpet/mixins/PlayerManagerMixin.java
+++ b/src/main/java/carpet/mixins/PlayerManagerMixin.java
@@ -72,7 +72,7 @@ public abstract class PlayerManagerMixin
                 serverPlayerEntity_3.kill();
                 continue;
             }
-            serverPlayerEntity_3.networkHandler.disconnect(new TranslatableText("multiplayer.disconnect.duplicate_login", new Object[0]));
+            serverPlayerEntity_3.networkHandler.disconnect(new TranslatableText("multiplayer.disconnect.duplicate_login"));
         }
     }
 
diff --git a/src/main/java/carpet/mixins/RedstoneWireBlockMixin.java b/src/main/java/carpet/mixins/RedstoneWireBlockMixin.java
index c2247f27..7fd650ea 100644
--- a/src/main/java/carpet/mixins/RedstoneWireBlockMixin.java
+++ b/src/main/java/carpet/mixins/RedstoneWireBlockMixin.java
@@ -36,10 +36,10 @@ public abstract class RedstoneWireBlockMixin implements RedstoneWireBlockInterfa
     private Set<BlockPos> affectedNeighbors;
 
     @Shadow
-    private int increasePower(int int_1, BlockState blockState_1) { return 0; };
+    private int increasePower(int int_1, BlockState blockState_1) { return 0; }
 
     @Shadow
-    private BlockState update(World world_1, BlockPos blockPos_1, BlockState blockState_1) { return null; };
+    private BlockState update(World world_1, BlockPos blockPos_1, BlockState blockState_1) { return null; }
 
     // =
 
diff --git a/src/main/java/carpet/mixins/ServerChunkManagerMixin.java b/src/main/java/carpet/mixins/ServerChunkManagerMixin.java
index ab20320f..2ef3a2ec 100644
--- a/src/main/java/carpet/mixins/ServerChunkManagerMixin.java
+++ b/src/main/java/carpet/mixins/ServerChunkManagerMixin.java
@@ -75,6 +75,7 @@ public abstract class ServerChunkManagerMixin
         }
     }
 
+    @SuppressWarnings("UnresolvedMixinReference")
     @Redirect(method = "method_20801", at = @At(
             value = "INVOKE",
             target = "Lnet/minecraft/world/SpawnHelper;spawnEntitiesInChunk(Lnet/minecraft/entity/EntityCategory;Lnet/minecraft/world/World;Lnet/minecraft/world/chunk/WorldChunk;Lnet/minecraft/util/math/BlockPos;)V"
@@ -88,6 +89,7 @@ public abstract class ServerChunkManagerMixin
         }
     }
 
+    @SuppressWarnings("UnresolvedMixinReference")
     @Redirect(method = "method_20801", at = @At(
             value = "INVOKE",
             target = "Lnet/minecraft/entity/EntityCategory;getSpawnCap()I"
diff --git a/src/main/java/carpet/mixins/ServerPlayerInteractionManager_cactusMixin.java b/src/main/java/carpet/mixins/ServerPlayerInteractionManager_cactusMixin.java
index 3a405cf2..5a99d629 100644
--- a/src/main/java/carpet/mixins/ServerPlayerInteractionManager_cactusMixin.java
+++ b/src/main/java/carpet/mixins/ServerPlayerInteractionManager_cactusMixin.java
@@ -21,7 +21,7 @@ public class ServerPlayerInteractionManager_cactusMixin
     ))
     private boolean activateWithOptionalCactus(BlockState blockState, World world_1, PlayerEntity playerEntity_1, Hand hand_1, BlockHitResult blockHitResult_1)
     {
-        Boolean flipped = BlockRotator.flipBlockWithCactus(blockState, world_1, playerEntity_1, hand_1, blockHitResult_1);
+        boolean flipped = BlockRotator.flipBlockWithCactus(blockState, world_1, playerEntity_1, hand_1, blockHitResult_1);
         if (flipped)
             return true;
 
diff --git a/src/main/java/carpet/mixins/ServerWorld_fakePlayersMixin.java b/src/main/java/carpet/mixins/ServerWorld_fakePlayersMixin.java
index 73b2bdab..1da9a056 100644
--- a/src/main/java/carpet/mixins/ServerWorld_fakePlayersMixin.java
+++ b/src/main/java/carpet/mixins/ServerWorld_fakePlayersMixin.java
@@ -14,7 +14,8 @@ import org.spongepowered.asm.mixin.injection.Redirect;
 @Mixin(ServerWorld.class)
 public abstract class ServerWorld_fakePlayersMixin
 {
-    @Shadow private boolean ticking;
+    @Shadow
+    boolean ticking;
 
     @Shadow /*@Nonnull*/ public abstract MinecraftServer getServer();
 
diff --git a/src/main/java/carpet/mixins/SummonCommandMixin.java b/src/main/java/carpet/mixins/SummonCommandMixin.java
index 8056e1ee..13a0d835 100644
--- a/src/main/java/carpet/mixins/SummonCommandMixin.java
+++ b/src/main/java/carpet/mixins/SummonCommandMixin.java
@@ -45,7 +45,7 @@ public class SummonCommandMixin
                 world.spawnEntity(skeletonHorseEntity_1);
             }
             world.addLightning(lightningEntity_1);
-            source.sendFeedback(new TranslatableText("commands.summon.success", new Object[]{lightningEntity_1.getDisplayName()}), true);
+            source.sendFeedback(new TranslatableText("commands.summon.success", lightningEntity_1.getDisplayName()), true);
             cir.setReturnValue(1);
             cir.cancel();
 
diff --git a/src/main/java/carpet/mixins/World_movableTEMixin.java b/src/main/java/carpet/mixins/World_movableTEMixin.java
index 8fa1bbff..8e14b16d 100644
--- a/src/main/java/carpet/mixins/World_movableTEMixin.java
+++ b/src/main/java/carpet/mixins/World_movableTEMixin.java
@@ -34,7 +34,7 @@ public abstract class World_movableTEMixin implements WorldInterface
     private Profiler profiler;
 
     @Shadow
-    protected abstract WorldChunk getWorldChunk(BlockPos blockPos_1);
+    public abstract WorldChunk getWorldChunk(BlockPos blockPos_1);
     
     @Shadow
     public abstract BlockState getBlockState(BlockPos blockPos_1);
diff --git a/src/main/java/carpet/patches/EntityPlayerMPFake.java b/src/main/java/carpet/patches/EntityPlayerMPFake.java
index 1ad6cf0d..0b8bcdad 100644
--- a/src/main/java/carpet/patches/EntityPlayerMPFake.java
+++ b/src/main/java/carpet/patches/EntityPlayerMPFake.java
@@ -19,6 +19,7 @@ import net.minecraft.world.dimension.DimensionType;
 import carpet.fakes.ServerPlayerEntityInterface;
 import carpet.utils.Messenger;
 
+@SuppressWarnings("EntityConstructor")
 public class EntityPlayerMPFake extends ServerPlayerEntity
 {
     public Runnable fixStartingPosition = () -> {};
@@ -93,6 +94,7 @@ public class EntityPlayerMPFake extends ServerPlayerEntity
         super(server, worldIn, profile, interactionManagerIn);
     }
 
+
     @Override
     public void kill()
     {
diff --git a/src/main/java/carpet/script/CarpetContext.java b/src/main/java/carpet/script/CarpetContext.java
index bb1cdc80..5add0cd6 100644
--- a/src/main/java/carpet/script/CarpetContext.java
+++ b/src/main/java/carpet/script/CarpetContext.java
@@ -6,7 +6,7 @@ import net.minecraft.util.math.BlockPos;
 public class CarpetContext extends Context
 {
     public ServerCommandSource s;
-    public BlockPos origin;
+    public final BlockPos origin;
     public CarpetContext(ScriptHost host, ServerCommandSource source, BlockPos origin)
     {
         super(host);
diff --git a/src/main/java/carpet/script/CarpetEventServer.java b/src/main/java/carpet/script/CarpetEventServer.java
index dd8cae7b..20d0db87 100644
--- a/src/main/java/carpet/script/CarpetEventServer.java
+++ b/src/main/java/carpet/script/CarpetEventServer.java
@@ -43,12 +43,12 @@ import java.util.stream.Collectors;
 
 public class CarpetEventServer
 {
-    public List<ScheduledCall> scheduledCalls = new LinkedList<>();
+    public final List<ScheduledCall> scheduledCalls = new LinkedList<>();
 
     public static class Callback
     {
-        public String host;
-        public FunctionValue function;
+        public final String host;
+        public final FunctionValue function;
 
         public Callback(String host, FunctionValue function)
         {
@@ -65,8 +65,8 @@ public class CarpetEventServer
 
     public static class ScheduledCall extends Callback
     {
-        public List<Value> args;
-        private CarpetContext ctx;
+        public final List<Value> args;
+        private final CarpetContext ctx;
         public long dueTime;
 
         public ScheduledCall(CarpetContext context, FunctionValue function, List<Value> args, long dueTime)
@@ -103,8 +103,8 @@ public class CarpetEventServer
     public static class CallbackList
     {
 
-        public List<Callback> callList;
-        public int reqArgs;
+        public final List<Callback> callList;
+        public final int reqArgs;
 
         public CallbackList(int reqArgs)
         {
@@ -454,7 +454,7 @@ public class CarpetEventServer
             {
                 return stat.getType().getRegistry().getId(stat.getValue());
             }
-            private Set<Identifier> skippedStats = new HashSet<Identifier>(){{
+            private final Set<Identifier> skippedStats = new HashSet<Identifier>(){{
                 add(Stats.TIME_SINCE_DEATH);
                 add(Stats.TIME_SINCE_REST);
                 add(Stats.PLAY_ONE_MINUTE);
@@ -476,14 +476,14 @@ public class CarpetEventServer
 
         // on projectile thrown (arrow from bows, crossbows, tridents, snoballs, e-pearls
 
-        public String name;
-        public static Map<String, Event> byName = new HashMap<String, Event>(){{
+        public final String name;
+        public static final Map<String, Event> byName = new HashMap<String, Event>(){{
             for (Event e: Event.values())
             {
                 put(e.name, e);
             }
         }};
-        public CallbackList handler;
+        public final CallbackList handler;
         Event(String name, CallbackList eventHandler)
         {
             this.name = name;
diff --git a/src/main/java/carpet/script/CarpetExpression.java b/src/main/java/carpet/script/CarpetExpression.java
index cb10102a..6e6054ba 100644
--- a/src/main/java/carpet/script/CarpetExpression.java
+++ b/src/main/java/carpet/script/CarpetExpression.java
@@ -133,9 +133,9 @@ import static java.lang.Math.sqrt;
 public class CarpetExpression
 {
 
-    private ServerCommandSource source;
-    private BlockPos origin;
-    private Expression expr;
+    private final ServerCommandSource source;
+    private final BlockPos origin;
+    private final Expression expr;
     Expression getExpr() {return expr;}
     private static long tickStart = 0L;
 
@@ -274,7 +274,7 @@ public class CarpetExpression
         return bs;
     }
 
-    private static Map<String, ParticleEffect> particleCache = new HashMap<>();
+    private static final Map<String, ParticleEffect> particleCache = new HashMap<>();
     private ParticleEffect getParticleData(String name)
     {
         ParticleEffect particle = particleCache.get(name);
@@ -2145,7 +2145,7 @@ public class CarpetExpression
                 args = Collections.singletonList(lv.get(3).evalValue(c));
             else if (lv.size()>4)
             {
-                args = new ArrayList<>(lv.subList(3, lv.size()).stream().map((vv) -> vv.evalValue(c)).collect(Collectors.toList()));
+                args = lv.subList(3, lv.size()).stream().map((vv) -> vv.evalValue(c)).collect(Collectors.toList());
             }
 
             ((EntityValue) v).setEvent((CarpetContext)c, what, function, args);
@@ -2377,12 +2377,12 @@ public class CarpetExpression
             CarpetContext cc = (CarpetContext)c;
             return (c_, t_) -> new LazyListValue()
             {
-                int minx = cx-sminx;
-                int miny = cy-sminy;
-                int minz = cz-sminz;
-                int maxx = cx+smaxx;
-                int maxy = cy+smaxy;
-                int maxz = cz+smaxz;
+                final int minx = cx-sminx;
+                final int miny = cy-sminy;
+                final int minz = cz-sminz;
+                final int maxx = cx+smaxx;
+                final int maxy = cy+smaxy;
+                final int maxz = cz+smaxz;
                 int x;
                 int y;
                 int z;
@@ -3188,7 +3188,7 @@ public class CarpetExpression
         this.expr.addLazyFunction("schedule", -1, (c, t, lv) -> {
             if (lv.size()<2)
                 throw new InternalExpressionException("'schedule' should have at least 2 arguments, delay and call name");
-            Long delay = NumericValue.asNumber(lv.get(0).evalValue(c)).getLong();
+            long delay = NumericValue.asNumber(lv.get(0).evalValue(c)).getLong();
 
             Value functionValue = lv.get(1).evalValue(c);
             if (!(functionValue instanceof FunctionValue))
diff --git a/src/main/java/carpet/script/CarpetScriptHost.java b/src/main/java/carpet/script/CarpetScriptHost.java
index 418681b3..012cba27 100644
--- a/src/main/java/carpet/script/CarpetScriptHost.java
+++ b/src/main/java/carpet/script/CarpetScriptHost.java
@@ -31,7 +31,7 @@ import static java.lang.Math.max;
 
 public class CarpetScriptHost extends ScriptHost
 {
-    private CarpetScriptServer scriptServer;
+    private final CarpetScriptServer scriptServer;
 
     private Tag globalState;
     private int saveTimeout;
diff --git a/src/main/java/carpet/script/CarpetScriptServer.java b/src/main/java/carpet/script/CarpetScriptServer.java
index 27b8f091..777d60de 100644
--- a/src/main/java/carpet/script/CarpetScriptServer.java
+++ b/src/main/java/carpet/script/CarpetScriptServer.java
@@ -33,14 +33,14 @@ import static net.minecraft.server.command.CommandManager.literal;
 public class CarpetScriptServer
 {
     //make static for now, but will change that later:
-    public CarpetScriptHost globalHost;
-    public Map<String, CarpetScriptHost> modules;
+    public final CarpetScriptHost globalHost;
+    public final Map<String, CarpetScriptHost> modules;
     public long tickStart;
     public boolean stopAll;
-    private Set<String> holyMoly;
-    public CarpetEventServer events;
+    private final Set<String> holyMoly;
+    public final CarpetEventServer events;
 
-    private static List<ModuleInterface> bundledModuleData = new ArrayList<ModuleInterface>(){{
+    private static final List<ModuleInterface> bundledModuleData = new ArrayList<ModuleInterface>(){{
         add(new BundledModule("camera"));
         add(new BundledModule("event_test"));
         add(new BundledModule("stats_test"));
diff --git a/src/main/java/carpet/script/Context.java b/src/main/java/carpet/script/Context.java
index 092a5697..31af496f 100644
--- a/src/main/java/carpet/script/Context.java
+++ b/src/main/java/carpet/script/Context.java
@@ -17,9 +17,9 @@ public class Context
     public static final int LOCALIZATION = 8;
     public static final int LVALUE = 9;
 
-    public Map<String, LazyValue> variables = new HashMap<>();
+    public final Map<String, LazyValue> variables = new HashMap<>();
 
-    public ScriptHost host;
+    public final ScriptHost host;
 
     Context(ScriptHost host)
     {
diff --git a/src/main/java/carpet/script/EntityEventsGroup.java b/src/main/java/carpet/script/EntityEventsGroup.java
index da753e48..6ea9d746 100644
--- a/src/main/java/carpet/script/EntityEventsGroup.java
+++ b/src/main/java/carpet/script/EntityEventsGroup.java
@@ -21,7 +21,7 @@ import java.util.stream.Collectors;
 
 public class EntityEventsGroup
 {
-    private Map<EntityEventType, Map<String, CarpetEventServer.ScheduledCall>> actions;
+    private final Map<EntityEventType, Map<String, CarpetEventServer.ScheduledCall>> actions;
     public EntityEventsGroup()
     {
         actions = new EnumMap<>(EntityEventType.class);
@@ -96,10 +96,10 @@ public class EntityEventsGroup
             }
         };
 
-        public static Map<String, EntityEventType> byName = Arrays.stream(EntityEventType.values()).collect(Collectors.toMap(ev -> ev.id, ev -> ev));
+        public static final Map<String, EntityEventType> byName = Arrays.stream(EntityEventType.values()).collect(Collectors.toMap(ev -> ev.id, ev -> ev));
 
-        public int argcount;
-        public String id;
+        public final int argcount;
+        public final String id;
         EntityEventType(String identifier, int args)
         {
             id = identifier;
@@ -121,6 +121,6 @@ public class EntityEventsGroup
         protected List<Value> makeArgs(Entity entity, Object ... args)
         {
             return Collections.singletonList(new EntityValue(entity));
-        };
+        }
     }
 }
diff --git a/src/main/java/carpet/script/Expression.java b/src/main/java/carpet/script/Expression.java
index 342834c8..ebd1d49c 100644
--- a/src/main/java/carpet/script/Expression.java
+++ b/src/main/java/carpet/script/Expression.java
@@ -357,7 +357,7 @@ public class Expression implements Cloneable
             "2.71828182845904523536028747135266249775724709369995957496696762772407663");
 
     // %[argument_index$][flags][width][.precision][t]conversion
-    private static Pattern formatPattern = Pattern.compile("%(\\d+\\$)?([-#+ 0,(\\<]*)?(\\d+)?(\\.\\d+)?([tT])?([a-zA-Z%])");
+    private static final Pattern formatPattern = Pattern.compile("%(\\d+\\$)?([-#+ 0,(<]*)?(\\d+)?(\\.\\d+)?([tT])?([a-zA-Z%])");
 
     /** The current infix expression */
     private String expression;
@@ -387,10 +387,10 @@ public class Expression implements Cloneable
     private LazyValue ast = null;
 
     /** script specific operatos and built-in functions */
-    private Map<String, ILazyOperator> operators = new Object2ObjectOpenHashMap<>();
+    private final Map<String, ILazyOperator> operators = new Object2ObjectOpenHashMap<>();
     boolean isAnOperator(String opname) { return operators.containsKey(opname) || operators.containsKey(opname+"u");}
 
-    private Map<String, ILazyFunction> functions = new  Object2ObjectOpenHashMap<>();
+    private final Map<String, ILazyFunction> functions = new  Object2ObjectOpenHashMap<>();
     Set<String> getFunctionNames() {return functions.keySet();}
 
     @Override
@@ -2878,7 +2878,6 @@ public class Expression implements Cloneable
                     else if (fmt == '%')
                     {
                         //skip /%%
-                        ;
                     }
                     else
                     {
@@ -3128,7 +3127,7 @@ public class Expression implements Cloneable
 
     }
 
-    static Expression none = new Expression("null");
+    static final Expression none = new Expression("null");
     /**
      * @param expression .
      */
diff --git a/src/main/java/carpet/script/ExpressionInspector.java b/src/main/java/carpet/script/ExpressionInspector.java
index 3eddc45c..e4eaa892 100644
--- a/src/main/java/carpet/script/ExpressionInspector.java
+++ b/src/main/java/carpet/script/ExpressionInspector.java
@@ -46,7 +46,7 @@ public class ExpressionInspector
     {
         Set<String> allFunctions = (new CarpetExpression("null", null, null)).getExpr().getFunctionNames();
         scarpetFunctions = new TreeSet<>(new Expression("null").getFunctionNames());
-        APIFunctions = new TreeSet<>(allFunctions.stream().filter(s -> !scarpetFunctions.contains(s)).collect(Collectors.toSet()));
+        APIFunctions = allFunctions.stream().filter(s -> !scarpetFunctions.contains(s)).collect(Collectors.toCollection(TreeSet::new));
     }
 
     public static List<String> suggestFunctions(ScriptHost host, String previous, String prefix)
diff --git a/src/main/java/carpet/script/exception/CarpetExpressionException.java b/src/main/java/carpet/script/exception/CarpetExpressionException.java
index 2c84bfa4..f19fcd80 100644
--- a/src/main/java/carpet/script/exception/CarpetExpressionException.java
+++ b/src/main/java/carpet/script/exception/CarpetExpressionException.java
@@ -8,7 +8,7 @@ import java.util.List;
 
 public class CarpetExpressionException extends RuntimeException
 {
-    public List<FunctionValue> stack;
+    public final List<FunctionValue> stack;
 
     public CarpetExpressionException(String message, List<FunctionValue> stack)
     {
diff --git a/src/main/java/carpet/script/exception/ExitStatement.java b/src/main/java/carpet/script/exception/ExitStatement.java
index 9b772923..0504e896 100644
--- a/src/main/java/carpet/script/exception/ExitStatement.java
+++ b/src/main/java/carpet/script/exception/ExitStatement.java
@@ -5,7 +5,7 @@ import carpet.script.value.Value;
 /* Exception thrown to terminate execution mid expression (aka return statement) */
 public class ExitStatement extends RuntimeException
 {
-    public Value retval;
+    public final Value retval;
     public ExitStatement(Value value)
     {
         retval = value;
diff --git a/src/main/java/carpet/script/exception/ExpressionException.java b/src/main/java/carpet/script/exception/ExpressionException.java
index fc475481..3d07f8ee 100644
--- a/src/main/java/carpet/script/exception/ExpressionException.java
+++ b/src/main/java/carpet/script/exception/ExpressionException.java
@@ -15,8 +15,8 @@ import static carpet.script.ExpressionInspector.Expression_getName;
 /* The expression evaluators exception class. */
 public class ExpressionException extends RuntimeException
 {
-    public Context context;
-    public List<FunctionValue> stack = new ArrayList<>();
+    public final Context context;
+    public final List<FunctionValue> stack = new ArrayList<>();
     public ExpressionException(Context c, String message)
     {
         super(makeMessage(c, null, null, message));
@@ -35,7 +35,7 @@ public class ExpressionException extends RuntimeException
         context = c;
     }
 
-    private static Fluff.TriFunction<Expression, Tokenizer.Token, String, List<String>> errorMaker = (expr, token, errmessage) ->
+    private static final Fluff.TriFunction<Expression, Tokenizer.Token, String, List<String>> errorMaker = (expr, token, errmessage) ->
     {
 
         List<String> errMsg = new ArrayList<>();
diff --git a/src/main/java/carpet/script/value/BlockValue.java b/src/main/java/carpet/script/value/BlockValue.java
index da9704d0..d8d199ed 100644
--- a/src/main/java/carpet/script/value/BlockValue.java
+++ b/src/main/java/carpet/script/value/BlockValue.java
@@ -36,8 +36,8 @@ public class BlockValue extends Value
     public static final BlockValue AIR = new BlockValue(Blocks.AIR.getDefaultState(), null, BlockPos.ORIGIN);
     public static final BlockValue NULL = new BlockValue(null, null, null);
     private BlockState blockState;
-    private BlockPos pos;
-    private ServerWorld world;
+    private final BlockPos pos;
+    private final ServerWorld world;
     private CompoundTag data;
 
     public static BlockValue fromCoords(CarpetContext c, int x, int y, int z)
@@ -46,7 +46,7 @@ public class BlockValue extends Value
         return new BlockValue(null, c.s.getWorld(), pos);
     }
 
-    private static Map<String, BlockValue> bvCache= new HashMap<>();
+    private static final Map<String, BlockValue> bvCache= new HashMap<>();
     public static BlockValue fromString(String str)
     {
         try
@@ -294,8 +294,8 @@ public class BlockValue extends Value
 
     public static class LocatorResult
     {
-        public BlockValue block;
-        public int offset;
+        public final BlockValue block;
+        public final int offset;
         LocatorResult(BlockValue b, int o)
         {
             block = b;
@@ -306,9 +306,9 @@ public class BlockValue extends Value
     public static class VectorLocator
     {
         public Vec3d vec;
-        public int offset;
-        public double yaw;
-        public double pitch;
+        public final int offset;
+        public final double yaw;
+        public final double pitch;
         public boolean fromBlock;
         VectorLocator(Vec3d v, int o)
         {
@@ -358,9 +358,9 @@ public class BlockValue extends Value
         EASTUP("east-up", 0.0, 0.6, 0.5, Direction.EAST),
         WESTUP("west-up", 1.0, 0.6, 0.5, Direction.WEST);
 
-        public String name;
-        public Vec3d hitOffset;
-        public Direction facing;
+        public final String name;
+        public final Vec3d hitOffset;
+        public final Direction facing;
 
         private static final Map<String, SpecificDirection> DIRECTION_MAP = Arrays.stream(values()).collect(Collectors.toMap(SpecificDirection::getName, d -> d));
 
diff --git a/src/main/java/carpet/script/value/EntityValue.java b/src/main/java/carpet/script/value/EntityValue.java
index 0489a28b..e88c4900 100644
--- a/src/main/java/carpet/script/value/EntityValue.java
+++ b/src/main/java/carpet/script/value/EntityValue.java
@@ -62,14 +62,14 @@ import static carpet.script.value.NBTSerializableValue.nameFromRegistryId;
 // TODO: decide whether copy(entity) should duplicate entity in the world.
 public class EntityValue extends Value
 {
-    private Entity entity;
+    private final Entity entity;
 
     public EntityValue(Entity e)
     {
         entity = e;
     }
 
-    private static Map<String, EntitySelector> selectorCache = new HashMap<>();
+    private static final Map<String, EntitySelector> selectorCache = new HashMap<>();
     public static Collection<? extends Entity > getEntitiesFromSelector(ServerCommandSource source, String selector)
     {
         try
@@ -177,7 +177,7 @@ public class EntityValue extends Value
         return res; //TODO add more here like search by tags, or type
         //if (who.startsWith('tag:'))
     }
-    private static Map<String, Pair<EntityType<?>, Predicate<? super Entity>>> entityPredicates =
+    private static final Map<String, Pair<EntityType<?>, Predicate<? super Entity>>> entityPredicates =
             new HashMap<String, Pair<EntityType<?>, Predicate<? super Entity>>>()
     {{
         put("*", Pair.of(null, EntityPredicates.VALID_ENTITY));
@@ -192,7 +192,7 @@ public class EntityValue extends Value
             throw new InternalExpressionException("Unknown entity feature: "+what);
         return featureAccessors.get(what).apply(entity, arg);
     }
-    private static Map<String, EquipmentSlot> inventorySlots = new HashMap<String, EquipmentSlot>(){{
+    private static final Map<String, EquipmentSlot> inventorySlots = new HashMap<String, EquipmentSlot>(){{
         put("mainhand", EquipmentSlot.MAINHAND);
         put("offhand", EquipmentSlot.OFFHAND);
         put("head", EquipmentSlot.HEAD);
@@ -200,7 +200,7 @@ public class EntityValue extends Value
         put("legs", EquipmentSlot.LEGS);
         put("feet", EquipmentSlot.FEET);
     }};
-    private static Map<String, BiFunction<Entity, Value, Value>> featureAccessors = new HashMap<String, BiFunction<Entity, Value, Value>>() {{
+    private static final Map<String, BiFunction<Entity, Value, Value>> featureAccessors = new HashMap<String, BiFunction<Entity, Value, Value>>() {{
         //put("test", (e, a) -> a == null ? Value.NULL : new StringValue(a.getString()));
         put("removed", (entity, arg) -> new NumericValue(entity.removed));
         put("uuid",(e, a) -> new StringValue(e.getUuidAsString()));
@@ -440,20 +440,6 @@ public class EntityValue extends Value
         });
     }};
 
-    private static <Req extends Entity> Req assertEntityArgType(Class<Req> klass, Value arg)
-    {
-        if (!(arg instanceof EntityValue))
-        {
-            return null;
-        }
-        Entity e = ((EntityValue) arg).getEntity();
-        if (!(klass.isAssignableFrom(e.getClass())))
-        {
-            return null;
-        }
-        return (Req)e;
-    }
-
     public void set(String what, Value toWhat)
     {
         if (!(featureModifiers.containsKey(what)))
@@ -515,7 +501,7 @@ public class EntityValue extends Value
 
 
 
-    private static Map<String, BiConsumer<Entity, Value>> featureModifiers = new HashMap<String, BiConsumer<Entity, Value>>() {{
+    private static final Map<String, BiConsumer<Entity, Value>> featureModifiers = new HashMap<String, BiConsumer<Entity, Value>>() {{
         put("remove", (entity, value) -> entity.remove());
         put("health", (e, v) -> { if (e instanceof LivingEntity) ((LivingEntity) e).setHealth((float) NumericValue.asNumber(v).getDouble()); });
         put("kill", (e, v) -> e.kill());
diff --git a/src/main/java/carpet/script/value/Value.java b/src/main/java/carpet/script/value/Value.java
index 3755ca8a..f97fb8d5 100644
--- a/src/main/java/carpet/script/value/Value.java
+++ b/src/main/java/carpet/script/value/Value.java
@@ -39,7 +39,7 @@ public abstract class Value implements Comparable<Value>, Cloneable
     }
     public Value reboundedTo(String var)
     {
-        Value copy = null;
+        Value copy;
         try
         {
             copy = (Value)clone();
@@ -202,5 +202,5 @@ public abstract class Value implements Comparable<Value>, Cloneable
             // should never happen
             throw new InternalExpressionException("Cannot make a copy of value: "+this);
         }
-    };
+    }
 }
diff --git a/src/main/java/carpet/settings/SettingsManager.java b/src/main/java/carpet/settings/SettingsManager.java
index 59977691..b67ae08f 100644
--- a/src/main/java/carpet/settings/SettingsManager.java
+++ b/src/main/java/carpet/settings/SettingsManager.java
@@ -242,7 +242,7 @@ public class SettingsManager
             Map<String,String> result = new HashMap<String, String>();
             while ((line = reader.readLine()) != null)
             {
-                line = line.replaceAll("\\r|\\n", "");
+                line = line.replaceAll("[\\r\\n]", "");
                 if ("locked".equalsIgnoreCase(line))
                 {
                     confLocked = true;
@@ -286,9 +286,7 @@ public class SettingsManager
         {
             if (rule.name.toLowerCase(Locale.ROOT).contains(lcSearch)) return true; // substring match, case insensitive
             for (String c : rule.categories) if (c.equals(search)) return true; // category exactly, case sensitive
-            if (Sets.newHashSet(rule.description.toLowerCase(Locale.ROOT).split("\\W+")).contains(lcSearch))
-                return true; // contains full term in description, but case insensitive
-            return false;
+            return Sets.newHashSet(rule.description.toLowerCase(Locale.ROOT).split("\\W+")).contains(lcSearch); // contains full term in description, but case insensitive
         }).sorted().collect(ImmutableList.toImmutableList());
     }
 
diff --git a/src/main/java/carpet/utils/BlockInfo.java b/src/main/java/carpet/utils/BlockInfo.java
index eb7fe510..548033eb 100644
--- a/src/main/java/carpet/utils/BlockInfo.java
+++ b/src/main/java/carpet/utils/BlockInfo.java
@@ -25,7 +25,7 @@ import java.util.Map;
 
 public class BlockInfo
 {
-    public static Map<BlockSoundGroup, String> soundName = new HashMap<BlockSoundGroup, String>() {{
+    public static final Map<BlockSoundGroup, String> soundName = new HashMap<BlockSoundGroup, String>() {{
         put(BlockSoundGroup.WOOD,   "wood"  );
         put(BlockSoundGroup.GRAVEL, "gravel");
         put(BlockSoundGroup.GRASS,  "grass" );
@@ -50,7 +50,7 @@ public class BlockInfo
         put(BlockSoundGroup.LANTERN , "lantern" );
     }};
 
-    public static Map<MaterialColor, String> mapColourName = new HashMap<MaterialColor, String>() {{
+    public static final Map<MaterialColor, String> mapColourName = new HashMap<MaterialColor, String>() {{
         put(MaterialColor.AIR       , "air"       );
         put(MaterialColor.GRASS     , "grass"     );
         put(MaterialColor.SAND      , "sand"      );
@@ -105,7 +105,7 @@ public class BlockInfo
         put(MaterialColor.BLACK_TERRACOTTA     , "black_terracotta"      );
     }};
 
-    public static Map<Material, String> materialName = new HashMap<Material, String>() {{
+    public static final Map<Material, String> materialName = new HashMap<Material, String>() {{
         put(Material.AIR            , "air"          );
         put(Material.STRUCTURE_VOID , "void"         );
         put(Material.PORTAL         , "portal"       );
@@ -233,7 +233,7 @@ public class BlockInfo
         long total_time = (total_ticks)/1000/20;
         return Messenger.s(String.format(" - Wander chance above: %.1f%%\n - Average standby above: %s",
                 (100.0F*success)/1000,
-                ((total_time>5000)?"INFINITY":(Long.toString(total_time)+" s"))
+                ((total_time>5000)?"INFINITY":(total_time +" s"))
         ));
     }
 }
diff --git a/src/main/java/carpet/utils/CarpetProfiler.java b/src/main/java/carpet/utils/CarpetProfiler.java
index 984fbbe9..57ec9ea1 100644
--- a/src/main/java/carpet/utils/CarpetProfiler.java
+++ b/src/main/java/carpet/utils/CarpetProfiler.java
@@ -21,9 +21,9 @@ public class CarpetProfiler
     private static int tick_health_elapsed = 0;
     private static TYPE test_type = TYPE.NONE; //1 for ticks, 2 for entities;
     private static long current_tick_start = 0;
-    private static String[] GENERAL_SECTIONS = {"Network", "Autosave", "Async Tasks"};
-    private static String[] DIMENSIONS = {"overworld", "the_end", "the_nether"};
-    private static String[] SECTIONS = {
+    private static final String[] GENERAL_SECTIONS = {"Network", "Autosave", "Async Tasks"};
+    private static final String[] DIMENSIONS = {"overworld", "the_end", "the_nether"};
+    private static final String[] SECTIONS = {
             "Spawning and Random Ticks", "Ticket Manager","Unloading",
             "Blocks", "Entities", "Block Entities",
             "Entities (Client)", "Block Entities (Client)",
@@ -39,10 +39,10 @@ public class CarpetProfiler
 
     public static class ProfilerToken
     {
-        public TYPE type;
-        public Object section;
-        public long start;
-        public World world;
+        public final TYPE type;
+        public final Object section;
+        public final long start;
+        public final World world;
 
         public ProfilerToken(TYPE type, Object section, World world, long start)
         {
diff --git a/src/main/java/carpet/utils/Messenger.java b/src/main/java/carpet/utils/Messenger.java
index 78be6bef..3b422262 100644
--- a/src/main/java/carpet/utils/Messenger.java
+++ b/src/main/java/carpet/utils/Messenger.java
@@ -114,7 +114,7 @@ public class Messenger
         {
             message = "w"+message;
         }
-        String parts[] = message.split("\\s", 2);
+        String[] parts = message.split("\\s", 2);
         String desc = parts[0];
         String str = "";
         if (parts.length > 1) str = parts[1];
diff --git a/src/main/java/carpet/utils/SpawnReporter.java b/src/main/java/carpet/utils/SpawnReporter.java
index b84fdbc7..d1dbcfa1 100644
--- a/src/main/java/carpet/utils/SpawnReporter.java
+++ b/src/main/java/carpet/utils/SpawnReporter.java
@@ -323,7 +323,7 @@ public class SpawnReporter
                     "w ' to enable"));
             return report;
         }
-        Long duration = (long) worldIn.getServer().getTicks() - track_spawns;
+        long duration = (long) worldIn.getServer().getTicks() - track_spawns;
         report.add(Messenger.c("bw --------------------"));
         String simulated = mock_spawns?"[SIMULATED] ":"";
         String location = (lower_spawning_limit != null)?String.format("[in (%d, %d, %d)x(%d, %d, %d)]",
@@ -410,8 +410,8 @@ public class SpawnReporter
                         continue; // vanilla bug
                     boolean canspawn = SpawnHelper.canSpawn(SpawnRestriction.getLocation(spawnEntry.type), worldIn, pos, spawnEntry.type);
                     int will_spawn = -1;
-                    boolean fits = false;
-                    boolean fits1 = false;
+                    boolean fits;
+                    boolean fits1;
                     
                     MobEntity mob;
                     try