Display Java supported versions as list in dumps

core/src/main/java/org/geysermc/geyser/command/defaults/VersionCommand.java

@@ -62,9 +62,16 @@ public class VersionCommand extends GeyserCommand {
         } else {
             bedrockVersions = MinecraftProtocol.SUPPORTED_BEDROCK_CODECS.get(0).getMinecraftVersion();
         }
+        String javaVersions;
+        List<String> supportedJavaVersions = MinecraftProtocol.getJavaVersions();
+        if (supportedJavaVersions.size() > 1) {
+            javaVersions = supportedJavaVersions.get(0) + " - " + supportedJavaVersions.get(supportedJavaVersions.size() - 1);
+        } else {
+            javaVersions = supportedJavaVersions.get(0);
+        }
 
         sender.sendMessage(GeyserLocale.getPlayerLocaleString("geyser.commands.version.version", sender.getLocale(),
-                GeyserImpl.NAME, GeyserImpl.VERSION, MinecraftProtocol.getJavaVersion(), bedrockVersions));
+                GeyserImpl.NAME, GeyserImpl.VERSION, javaVersions, bedrockVersions));
 
         // Disable update checking in dev mode and for players in Geyser Standalone
         if (GeyserImpl.getInstance().productionEnvironment() && !(!sender.isConsole() && geyser.getPlatformType() == PlatformType.STANDALONE)) {

core/src/main/java/org/geysermc/geyser/dump/DumpInfo.java

@@ -207,14 +207,14 @@ public class DumpInfo {
         private final List<String> bedrockVersions;
         private final List<Integer> bedrockProtocols;
         private final int defaultBedrockProtocol;
-        private final String javaVersion;
+        private final List<String> javaVersions;
         private final int javaProtocol;
 
         MCInfo() {
             this.bedrockVersions = MinecraftProtocol.SUPPORTED_BEDROCK_CODECS.stream().map(BedrockPacketCodec::getMinecraftVersion).toList();
             this.bedrockProtocols = MinecraftProtocol.SUPPORTED_BEDROCK_CODECS.stream().map(BedrockPacketCodec::getProtocolVersion).toList();
             this.defaultBedrockProtocol = MinecraftProtocol.DEFAULT_BEDROCK_CODEC.getProtocolVersion();
-            this.javaVersion = MinecraftProtocol.getJavaVersion();
+            this.javaVersions = MinecraftProtocol.getJavaVersions();
             this.javaProtocol = MinecraftProtocol.getJavaProtocolVersion();
         }
     }

core/src/main/java/org/geysermc/geyser/network/MinecraftProtocol.java

@@ -33,6 +33,7 @@ import com.nukkitx.protocol.bedrock.v471.Bedrock_v471;
 import com.nukkitx.protocol.bedrock.v475.Bedrock_v475;
 
 import java.util.ArrayList;
+import java.util.Arrays;
 import java.util.List;
 import java.util.StringJoiner;
 
@@ -86,12 +87,12 @@ public final class MinecraftProtocol {
     }
 
     /**
-     * Gets the supported Minecraft: Java Edition version name.
+     * Gets the supported Minecraft: Java Edition version names.
      *
-     * @return the supported Minecraft: Java Edition version name
+     * @return the supported Minecraft: Java Edition version names
      */
-    public static String getJavaVersion() {
+    public static List<String> getJavaVersions() {
-        return "1.18 - 1.18.1";
+        return Arrays.asList("1.18", "1.18.1");
     }
 
     /**
@@ -104,9 +105,9 @@ public final class MinecraftProtocol {
     }
 
     /**
-     * @return a string showing all supported versions for this Geyser instance
+     * @return a string showing all supported Bedrock versions for this Geyser instance
      */
-    public static String getAllSupportedVersions() {
+    public static String getAllSupportedBedrockVersions() {
         StringJoiner joiner = new StringJoiner(", ");
         for (BedrockPacketCodec packetCodec : SUPPORTED_BEDROCK_CODECS) {
             joiner.add(packetCodec.getMinecraftVersion());
@@ -115,6 +116,18 @@ public final class MinecraftProtocol {
         return joiner.toString();
     }
 
+    /**
+     * @return a string showing all supported Java versions for this Geyser instance
+     */
+    public static String getAllSupportedJavaVersions() {
+        StringJoiner joiner = new StringJoiner(", ");
+        for (String version : getJavaVersions()) {
+            joiner.add(version);
+        }
+
+        return joiner.toString();
+    }
+
     private MinecraftProtocol() {
     }
 }

core/src/main/java/org/geysermc/geyser/network/UpstreamPacketHandler.java

@@ -70,7 +70,7 @@ public class UpstreamPacketHandler extends LoggingPacketHandler {
 
         BedrockPacketCodec packetCodec = MinecraftProtocol.getBedrockCodec(loginPacket.getProtocolVersion());
         if (packetCodec == null) {
-            String supportedVersions = MinecraftProtocol.getAllSupportedVersions();
+            String supportedVersions = MinecraftProtocol.getAllSupportedBedrockVersions();
             if (loginPacket.getProtocolVersion() > MinecraftProtocol.DEFAULT_BEDROCK_CODEC.getProtocolVersion()) {
                 // Too early to determine session locale
                 session.getGeyser().getLogger().info(GeyserLocale.getLocaleStringLog("geyser.network.outdated.server", supportedVersions));