diff --git a/src/main/java/net/raphimc/viaproxy/cli/options/VersionEnumConverter.java b/src/main/java/net/raphimc/viaproxy/cli/options/VersionEnumConverter.java
index af89783..fdd4bff 100644
--- a/src/main/java/net/raphimc/viaproxy/cli/options/VersionEnumConverter.java
+++ b/src/main/java/net/raphimc/viaproxy/cli/options/VersionEnumConverter.java
@@ -44,7 +44,7 @@ public class VersionEnumConverter implements ValueConverter<VersionEnum> {
     public String valuePattern() {
         StringBuilder s = new StringBuilder();
         for (VersionEnum version : VersionEnum.getAllVersions()) {
-            s.append((s.length() == 0) ? "" : ", ").append(version.getName());
+            s.append((s.isEmpty()) ? "" : ", ").append(version.getName());
         }
         return "[" + s + "]";
     }
diff --git a/src/main/java/net/raphimc/viaproxy/protocolhack/providers/ViaProxyClassicCustomCommandProvider.java b/src/main/java/net/raphimc/viaproxy/protocolhack/providers/ViaProxyClassicCustomCommandProvider.java
index 86776c4..36c4f51 100644
--- a/src/main/java/net/raphimc/viaproxy/protocolhack/providers/ViaProxyClassicCustomCommandProvider.java
+++ b/src/main/java/net/raphimc/viaproxy/protocolhack/providers/ViaProxyClassicCustomCommandProvider.java
@@ -32,7 +32,7 @@ public class ViaProxyClassicCustomCommandProvider extends ClassicCustomCommandPr
             if (message.startsWith("/")) {
                 message = message.substring(1);
                 final String[] args = message.split(" ");
-                if (args.length <= 0) return super.handleChatMessage(user, message);
+                if (args.length == 0) return super.handleChatMessage(user, message);
                 if (args[0].equals("settime")) {
                     try {
                         if (args.length > 1) {
diff --git a/src/main/java/net/raphimc/viaproxy/util/ArrayHelper.java b/src/main/java/net/raphimc/viaproxy/util/ArrayHelper.java
index 2dec49e..8b563c0 100644
--- a/src/main/java/net/raphimc/viaproxy/util/ArrayHelper.java
+++ b/src/main/java/net/raphimc/viaproxy/util/ArrayHelper.java
@@ -346,23 +346,23 @@ public class ArrayHelper {
             return "";
         }
 
-        String out = "";
+        StringBuilder out = new StringBuilder();
         for (int i = start; i <= end; i++) {
             if (out.isEmpty()) {
-                out = this.getString(i);
+                out = new StringBuilder(this.getString(i));
             } else {
-                out += combiner + this.getString(i);
+                out.append(combiner).append(this.getString(i));
             }
         }
-        return out;
+        return out.toString();
     }
 
 
     @Override
     public String toString() {
-        String complete = "";
+        StringBuilder complete = new StringBuilder();
         for (String t : this.array) {
-            complete += (complete.isEmpty() ? "" : ", ") + t;
+            complete.append((complete.isEmpty()) ? "" : ", ").append(t);
         }
         return "[" + complete + "]";
     }