AWS Lambda adds support for Java 25

AWS Lambda now supports creating serverless applications using Java 25. This runtime is based on the latest long-term support release of Amazon Corretto, Amazon’s distribution of OpenJDK. You can use Java 25 as both a managed runtime and a container base image, and AWS will automatically apply updates to the managed runtime and base image as they become available.

This release brings the latest Java language features to Lambda developers, such as primitive types in patterns, module import declarations, and flexible constructor bodies. It also includes several performance enhancements, such as Ahead-of-Time caches, adjustments to tiered compilation defaults, and removing the patch for the Log4Shell vulnerability from 2021. You can use the full range of AWS deployment tools, including the Lambda console, AWS CLI, AWS Serverless Application Model (AWS SAM), CDK, and AWS CloudFormation to deploy and manage serverless applications written in Java 25. The runtime supports Lambda Snap Start (in supported Regions) for fast cold starts. Powertools for AWS Lambda (Java), a developer toolkit to implement serverless best practices and increase developer velocity, also supports Java 25.

The Lambda Java 25 runtime is available in all Regions, including AWS GovCloud (US) Regions and China Regions.

For more information, including guidance on upgrading existing Lambda functions, read our blog post. For more information about AWS Lambda, visit our product page.