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docs/snippets/java/ocr/cloud_ocr_backend.md

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+```java title="Java"
+import dev.kreuzberg.*;
+import java.lang.foreign.Arena;
+import java.lang.foreign.MemorySegment;
+import java.lang.foreign.ValueLayout;
+import java.net.http.*;
+import java.net.URI;
+
+public class CloudOcrExample {
+    public static void main(String[] args) {
+        Arena callbackArena = Arena.ofAuto();
+        String apiKey = "your-api-key";
+
+        OcrBackend cloudOcr = (imageBytes, imageLength, configJson) -> {
+            try {
+                // Read image bytes from native memory
+                byte[] image = imageBytes.reinterpret(imageLength)
+                    .toArray(ValueLayout.JAVA_BYTE);
+
+                // Read config JSON
+                String config = configJson.reinterpret(Long.MAX_VALUE)
+                    .getString(0);
+
+                // Call cloud OCR API
+                HttpClient client = HttpClient.newHttpClient();
+                HttpRequest request = HttpRequest.newBuilder()
+                    .uri(URI.create("https://api.example.com/ocr"))
+                    .header("Authorization", "Bearer " + apiKey)
+                    .POST(HttpRequest.BodyPublishers.ofByteArray(image))
+                    .build();
+
+                HttpResponse<String> response = client.send(request,
+                    HttpResponse.BodyHandlers.ofString());
+
+                String text = parseTextFromResponse(response.body());
+
+                // Return result as C string
+                return callbackArena.allocateFrom(text);
+            } catch (Exception e) {
+                return MemorySegment.NULL;
+            }
+        };
+
+        try (Arena arena = Arena.ofConfined()) {
+            Kreuzberg.registerOcrBackend("cloud-ocr", cloudOcr, arena);
+
+            // Use custom OCR backend in extraction
+            // Note: Requires ExtractionConfig with OCR enabled
+            ExtractionResult result = Kreuzberg.extractFileSync("scanned.pdf");
+        } catch (Exception e) {
+            e.printStackTrace();
+        }
+    }
+
+    private static String parseTextFromResponse(String json) {
+        // Parse JSON response and extract text field
+        return json; // Simplified
+    }
+}
+```