---
title: "Handling errors | Nutrient Java SDK"
canonical_url: "https://www.nutrient.io/guides/java/troubleshooting/error-handling/"
md_url: "https://www.nutrient.io/guides/java/troubleshooting/error-handling.md"
last_updated: "2026-06-09T21:11:56.025Z"
description: "Handle Nutrient Java SDK errors and keep document workflows predictable."
---

# Handling errors

Use structured error handling to keep Java document workflows predictable. Nutrient Java SDK raises `NutrientException` when an SDK operation fails, so you can use standard Java exception patterns in your application.

For production systems, error handling helps you:

- Return useful feedback

- Isolate failures to individual documents

- Control fallback or retry logic

## Implement error handling with the Java SDK

Nutrient Java SDK integrates with Java’s built-in exception model. Catch `NutrientException` to handle SDK-specific failures and keep conversion logic readable.

## Prepare the project

Define a package and class:

```java

package io.nutrient.Sample;

```

Import SDK classes and Java NIO utilities:

```java

import io.nutrient.sdk.Document;
import io.nutrient.sdk.exceptions.NutrientException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;

public class ErrorHandling {

```

## Validate input and catch errors

Validate the input path before processing. Then call the conversion method and catch `NutrientException`:

```java

    public static void main(String[] args) {
        String inputFile = "input.pdf";
        String outputFile = "output.pdf";

        // Check if input file exists before processing
        if (!fileExists(inputFile)) {
            System.err.println("Error: Input file '" + inputFile + "' not found.");
            System.exit(1);
        }

        System.out.println("Opening document: " + inputFile);

        try {
            convertDocument(inputFile, outputFile);
            System.out.println("Conversion completed successfully!");
            System.out.println("Output file: " + outputFile);
        } catch (NutrientException e) {
            // Handle Nutrient SDK specific errors
            System.err.println("Nutrient SDK Error: " + e.getMessage());
            System.err.println("This could be due to:");
            System.err.println("  - Invalid or corrupted input file");
            System.err.println("  - Unsupported file format");
            System.err.println("  - License issues");
            System.err.println("  - Insufficient permissions");
            System.exit(1);
        }
    }

```

## Wrap SDK operations

Keep SDK calls in a dedicated method that declares `throws NutrientException`:

```java

    private static void convertDocument(String inputFile, String outputFile) throws NutrientException {
        try (Document document = Document.open(inputFile)) {
            System.out.println("Document opened successfully.");

            System.out.println("Converting to PDF...");
            document.exportAsPdf(outputFile);
        }
    }

```

## Add helper utilities

Use Java NIO to validate file existence:

```java

    private static boolean fileExists(String filePath) {
        Path path = Paths.get(filePath);
        return Files.exists(path) && Files.isRegularFile(path);
    }
}

```

## Summary

The flow has three steps:

1. Validate the input file path.

2. Open and convert the document.

3. Catch `NutrientException` and return clear error output.

Download [this sample package](https://www.nutrient.io/downloads/samples/java/error-handling.zip) to run the example locally.
---

## Related pages

- [Nutrient Java SDK troubleshooting guides](/guides/java/troubleshooting.md)