Don't use streams as they're lower performance for our use cases.

Some minor reformating too.

Bukkit/src/main/java/com/github/intellectualsites/plotsquared/bukkit/util/NbtFactory.java

@@ -154,7 +154,8 @@ public class NbtFactory {
      * @return The decoded NBT compound.
      * @throws IOException If anything went wrong.
      */
-    @SuppressWarnings({"IOResourceOpenedButNotSafelyClosed", "resource"}) public static NbtCompound fromStream(InputStream input, StreamOptions option)
+    @SuppressWarnings({"IOResourceOpenedButNotSafelyClosed", "resource"})
+    public static NbtCompound fromStream(InputStream input, StreamOptions option)
         throws IOException {
         DataInputStream data = null;
         boolean suppress = true;
@@ -527,7 +528,9 @@ public class NbtFactory {
      *
      * @author Kristian
      */
-    public enum StreamOptions {NO_COMPRESSION, GZIP_COMPRESSION,}
+    public enum StreamOptions {
+        NO_COMPRESSION, GZIP_COMPRESSION,
+    }
 
 
     private enum NbtType {

Core/src/main/java/com/github/intellectualsites/plotsquared/commands/Argument.java

@@ -2,8 +2,6 @@ package com.github.intellectualsites.plotsquared.commands;
 
 import com.github.intellectualsites.plotsquared.plot.object.PlotId;
 
-import java.util.stream.Stream;
-
 public abstract class Argument<T> {
 
     public static final Argument<Integer> Integer = new Argument<Integer>("int", 16) {
@@ -19,9 +17,11 @@ public abstract class Argument<T> {
     public static final Argument<Boolean> Boolean = new Argument<Boolean>("boolean", true) {
         @Override public Boolean parse(String in) {
             Boolean value = null;
-            if (Stream.of("true", "Yes", "1").anyMatch(in::equalsIgnoreCase)) {
+            if (in.equalsIgnoreCase("true") || in.equalsIgnoreCase("Yes") || in
+                .equalsIgnoreCase("1")) {
                 value = true;
-            } else if (Stream.of("false", "No", "0").anyMatch(in::equalsIgnoreCase)) {
+            } else if (in.equalsIgnoreCase("false") || in.equalsIgnoreCase("No") || in
+                .equalsIgnoreCase("0")) {
                 value = false;
             }
             return value;

Core/src/main/java/com/github/intellectualsites/plotsquared/plot/commands/Owner.java

@@ -9,7 +9,6 @@ import com.github.intellectualsites.plotsquared.plot.util.*;
 
 import java.util.Set;
 import java.util.UUID;
-import java.util.stream.Stream;
 
 @CommandDeclaration(command = "setowner", permission = "plots.set.owner",
     description = "Set the plot owner", usage = "/plot setowner <player>",
@@ -32,7 +31,8 @@ import java.util.stream.Stream;
             name = name == null ? value : name;
         }
         if (uuid == null || value.equalsIgnoreCase("-")) {
-            if (Stream.of("none", "null", "-").anyMatch(value::equalsIgnoreCase)) {
+            if (value.equalsIgnoreCase("none") || value.equalsIgnoreCase("null") || value
+                .equalsIgnoreCase("-")) {
                 if (!Permissions
                     .hasPermission(player, C.PERMISSION_ADMIN_COMMAND_SETOWNER.s(), true)) {
                     return false;

Core/src/main/java/com/github/intellectualsites/plotsquared/plot/object/Direction.java

@@ -3,8 +3,7 @@ package com.github.intellectualsites.plotsquared.plot.object;
 public enum Direction {
     NORTH(0, "north"), EAST(1, "east"), SOUTH(2, "south"), WEST(3, "west"), NORTHEAST(4,
         "northeast"), SOUTHEAST(5, "southeast"), SOUTHWEST(6, "southwest"), NORTHWEST(7,
-        "northwest"),
+        "northwest"),;
-    ;
 
 
     private int index;

Core/src/main/java/com/github/intellectualsites/plotsquared/plot/object/Plot.java

@@ -33,7 +33,6 @@ import java.util.*;
 import java.util.Map.Entry;
 import java.util.concurrent.ConcurrentHashMap;
 import java.util.stream.Collectors;
-import java.util.stream.IntStream;
 
 /**
  * The plot class<br>
@@ -516,7 +515,8 @@ public class Plot {
      * @return true if this plot is merged, otherwise false
      */
     public boolean isMerged() {
-        return IntStream.of(0, 2, 1, 3).anyMatch(i -> getSettings().getMerged(i));
+        return getSettings().getMerged(0) || getSettings().getMerged(2) || getSettings()
+            .getMerged(1) || getSettings().getMerged(3);
     }
 
     /**

Core/src/main/java/com/github/intellectualsites/plotsquared/plot/util/ArrayUtil.java

@@ -5,7 +5,9 @@ import java.util.Arrays;
 public class ArrayUtil {
     public static final <T> T[] concatAll(T[] first, T[]... rest) {
         int totalLength = first.length;
-        totalLength += Arrays.stream(rest).mapToInt(array -> array.length).sum();
+        for (T[] array : rest) {
+            totalLength += array.length;
+        }
         T[] result = Arrays.copyOf(first, totalLength);
         int offset = first.length;
         for (T[] array : rest) {