первая проба

anvil-loader/src/main/java/mc/world/anvil/Main.java

@@ -0,0 +1,24 @@
+package mc.world.anvil;
+
+import com.flowpowered.nbt.Tag;
+import com.flowpowered.nbt.stream.NBTInputStream;
+
+import java.io.FileInputStream;
+import java.io.IOException;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+
+public class Main {
+    public static void main(String[] args) throws IOException {
+        final Path levelDatPath = Paths.get(args[0]);
+
+        FileInputStream fis = new FileInputStream(levelDatPath.toFile());
+        NBTInputStream nbtInputStream = new NBTInputStream(fis);
+
+        Tag rootTag = nbtInputStream.readTag();
+        System.out.println(rootTag.toString());
+
+        nbtInputStream.close();
+        fis.close();
+    }
+}