Use constants for hex character

api/src/main/java/net/kyori/adventure/text/format/TextColor.java

@@ -47,6 +47,19 @@
  * @since 4.0.0
  */
 public interface TextColor extends Comparable<TextColor>, Examinable, RGBLike, StyleBuilderApplicable, TextFormat {
+  /**
+   * The hex character.
+   *
+   * @since 4.14.0
+   */
+  char HEX_CHARACTER = '#';
+  /**
+   * The hex character, in {@code String} format.
+   *
+   * @since 4.14.0
+   */
+  String HEX_PREFIX = "#";
+
   /**
    * Creates a new text colour.
    *
@@ -144,7 +157,7 @@ public interface TextColor extends Comparable<TextColor>, Examinable, RGBLike, S
    * @since 4.0.0
    */
   static @Nullable TextColor fromHexString(final @NotNull String string) {
-    if (string.startsWith("#")) {
+    if (string.startsWith(HEX_PREFIX)) {
       try {
         final int hex = Integer.parseInt(string.substring(1), 16);
         return color(hex);
@@ -163,7 +176,7 @@ public interface TextColor extends Comparable<TextColor>, Examinable, RGBLike, S
    * @since 4.0.0
    */
   static @Nullable TextColor fromCSSHexString(final @NotNull String string) {
-    if (string.startsWith("#")) {
+    if (string.startsWith(HEX_PREFIX)) {
       final String hexString = string.substring(1);
       if (hexString.length() != 3 && hexString.length() != 6) {
         return null;
@@ -202,7 +215,7 @@ public interface TextColor extends Comparable<TextColor>, Examinable, RGBLike, S
    * @since 4.0.0
    */
   default @NotNull String asHexString() {
-    return String.format("#%06x", this.value());
+    return String.format("%c%06x", HEX_CHARACTER, this.value());
   }
 
   /**

serializer-configurate3/src/main/java/net/kyori/adventure/serializer/configurate3/TextColorSerializer.java

@@ -34,7 +34,6 @@
 @SuppressWarnings("UnstableApiUsage") // TypeToken
 final class TextColorSerializer extends ScalarSerializer<TextColor> {
   static final TextColorSerializer INSTANCE = new TextColorSerializer();
-  private static final String HEX_PREFIX = "#";
 
   private TextColorSerializer() {
     super(TextColor.class);
@@ -49,7 +48,7 @@ public TextColor deserialize(final @NotNull TypeToken<?> type, final @NotNull Ob
     }
     final String value = obj.toString();
     final TextColor result;
-    if (value.startsWith(HEX_PREFIX)) {
+    if (value.startsWith(TextColor.HEX_PREFIX)) {
       result = TextColor.fromHexString(value);
     } else {
       result = NamedTextColor.NAMES.value(value);

serializer-configurate4/src/main/java/net/kyori/adventure/serializer/configurate4/TextColorSerializer.java

@@ -33,7 +33,6 @@
 
 final class TextColorSerializer extends ScalarSerializer<TextColor> {
   static final TextColorSerializer INSTANCE = new TextColorSerializer();
-  private static final String HEX_PREFIX = "#";
 
   private TextColorSerializer() {
     super(TextColor.class);
@@ -48,7 +47,7 @@ public TextColor deserialize(final @NotNull Type type, final @NotNull Object obj
     }
     final String value = obj.toString();
     final TextColor result;
-    if (value.startsWith(HEX_PREFIX)) {
+    if (value.startsWith(TextColor.HEX_PREFIX)) {
       result = TextColor.fromHexString(value);
     } else {
       result = NamedTextColor.NAMES.value(value);

text-minimessage/src/main/java/net/kyori/adventure/text/minimessage/tag/standard/ColorTagResolver.java

@@ -44,7 +44,6 @@
  * @since 4.10.0
  */
 final class ColorTagResolver implements TagResolver, SerializableResolver.Single {
-  private static final char HEX = '#';
   private static final String COLOR_3 = "c";
   private static final String COLOR_2 = "colour";
   private static final String COLOR = "color";
@@ -95,7 +94,7 @@ private static boolean isColorOrAbbreviation(final String name) {
     final TextColor color;
     if (COLOR_ALIASES.containsKey(colorName)) {
       color = COLOR_ALIASES.get(colorName);
-    } else if (colorName.charAt(0) == HEX) {
+    } else if (colorName.charAt(0) == TextColor.HEX_CHARACTER) {
       color = TextColor.fromHexString(colorName);
     } else {
       color = NamedTextColor.NAMES.value(colorName);

text-minimessage/src/main/java/net/kyori/adventure/text/minimessage/tag/standard/TransitionTag.java

@@ -77,7 +77,7 @@ static Tag create(final ArgumentQueue args, final Context ctx) {
 
         final String argValue = arg.value();
         final TextColor parsedColor;
-        if (argValue.charAt(0) == '#') {
+        if (argValue.charAt(0) == TextColor.HEX_CHARACTER) {
           parsedColor = TextColor.fromHexString(argValue);
         } else {
           parsedColor = NamedTextColor.NAMES.value(arg.lowerValue());

text-serializer-gson/src/main/java/net/kyori/adventure/text/serializer/gson/TextColorSerializer.java

@@ -55,7 +55,7 @@ public void write(final JsonWriter out, final TextColor value) throws IOExceptio
   }
 
   private static String asUpperCaseHexString(final TextColor color) {
-    return String.format(Locale.ROOT, "#%06X", color.value()); // to be consistent with vanilla
+    return String.format(Locale.ROOT, "%c%06X", TextColor.HEX_CHARACTER, color.value()); // to be consistent with vanilla
   }
 
   @Override
@@ -67,7 +67,7 @@ private static String asUpperCaseHexString(final TextColor color) {
   }
 
   static @Nullable TextColor fromString(final @NotNull String value) {
-    if (value.startsWith("#")) {
+    if (value.startsWith(TextColor.HEX_PREFIX)) {
       return TextColor.fromHexString(value);
     } else {
       return NamedTextColor.NAMES.value(value);

text-serializer-legacy/src/main/java/net/kyori/adventure/text/serializer/legacy/LegacyComponentSerializer.java

@@ -33,6 +33,7 @@
 import net.kyori.adventure.text.event.HoverEvent;
 import net.kyori.adventure.text.flattener.ComponentFlattener;
 import net.kyori.adventure.text.format.Style;
+import net.kyori.adventure.text.format.TextColor;
 import net.kyori.adventure.text.serializer.ComponentSerializer;
 import net.kyori.adventure.util.Buildable;
 import net.kyori.adventure.util.PlatformAPI;
@@ -135,7 +136,7 @@ public interface LegacyComponentSerializer extends ComponentSerializer<Component
    *
    * @since 4.0.0
    */
-  char HEX_CHAR = '#';
+  char HEX_CHAR = TextColor.HEX_CHARACTER;
 
   /**
    * Deserialize a component from a legacy {@link String}.