safe-java-streams is a lightweight Java library that adds functional utilities for exception handling and Either/Try/Result style value processing, enabling cleaner, safer, and more predictable code.

It helps:

• Eliminate boilerplate try/catch in Stream API
• Handle errors without exceptions using Either / Result
• Represent computations that may fail using Try
• Bridge Java's checked exceptions into functional pipelines

<repositories> <repository> <id>github</id> <name>GitHub Packages</name> <url>https://maven.pkg.github.com/aDudko/safe-java-streams</url> </repository> </repositories>

<dependency> <groupId>io.github.aDudko</groupId> <artifactId>safe-java-streams</artifactId> <version>1.0.0</version> </dependency>

A disjoint union of Left and Right, representing success or error.

• map, flatMap, fold, toOptional
• recover, recoverWith, peek
• getOrElse, orElseThrow

Encapsulates a computation that may fail:

• Success or Failure
• Fluent chaining with map, flatMap, recover
• Transform to Optional / Either

Inspired by Rust/Scala. Encapsulates success or failure with separate types:

• map, flatMap, mapError, recover
• get, getOrElse, toEither, toOptional

Adapter utilities for using checked-exception-throwing lambdas in Stream API:

• wrapFunction, wrapConsumer, wrapSupplier etc.
• safeFunctionOptional, safeFunctionEither

• Tests written with JUnit 5
• Covers all core features: Either, Try, Result, CheckedAdapters

👉 Browse Online Documentation

• Add Try<T> and Result<T, E>
• Improve error handling ergonomics
• Add Validated and NonEmptyList
• Add monadic and DSL-style builders
• Gradle & Kotlin support

...give it a star, fork it, or mention it in your next data project!

Anatoly Dudko
GitHub @aDudko • LinkedIn