Refactor packet string charset

src/main/java/net/packet/ByteBufInPacket.java

@@ -47,12 +47,9 @@ public class ByteBufInPacket implements InPacket {
     @Override
     public String readString() {
         short length = readShort();
-        char[] characters = new char[length];
-        for(int i = 0; i < length; i++) {
-            characters[i] = (char) readByte();
-        }
-
-        return String.valueOf(characters);
+        byte[] stringBytes = new byte[length];
+        byteBuf.readBytes(stringBytes);
+        return new String(stringBytes, STRING_CHARSET);
     }
 
     @Override

src/main/java/net/packet/OutPacket.java

@@ -1,12 +1,8 @@
 package net.packet;
 
 import java.awt.*;
-import java.nio.charset.Charset;
-import java.nio.charset.StandardCharsets;
 
 public interface OutPacket extends Packet {
-    Charset STRING_CHARSET = StandardCharsets.US_ASCII;
-
     void writeByte(byte value);
     void writeByte(int value);
     void writeBytes(byte[] value);

src/main/java/net/packet/Packet.java

@@ -1,5 +1,10 @@
 package net.packet;
 
+import java.nio.charset.Charset;
+import java.nio.charset.StandardCharsets;
+
 public interface Packet {
+    Charset STRING_CHARSET = StandardCharsets.US_ASCII;
+
     byte[] getBytes();
 }