How do I install the 123 Java Exception Handling skill?

Run npx skillmds@latest add jabrena/123-java-exception-handling in your terminal (requires Node.js), paste this page's agent-chat prompt into Claude, Cursor, or any MCP-connected agent, or download the SKILL.md file and copy it into your agent's skills directory.

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Is 123 Java Exception Handling free to use?

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Who published 123 Java Exception Handling?

jabrena (@jabrena) published this skill. Their other Agent Skills are listed on their SkillMD profile.

123 Java Exception Handling by jabrena

Name: 123 Java Exception Handling
Author: jabrena

123 Java Exception Handling

Use when you need to apply Java exception handling best practices — including using specific exception types, managing resources with try-with-resources, securing exception messages, preserving error context via exception chaining, validating inputs early with fail-fast principles, handling thread interruption correctly, documenting exceptions with @throws, enforcing logging policy, translating exceptions at API boundaries, managing retries and idempotency, enforcing timeouts, attaching suppressed exceptions, and propagating failures in async/reactive code. Part of the skills-for-java project

jabrena e84fdf0 2 files · 97.4 KB Updated Sep 17, 2026

File contents

Java Exception Handling Guidelines

Identify and apply robust Java exception handling practices to improve error clarity, security, debuggability, and system reliability.

What is covered in this Skill?

Specific exception types instead of generic Exception/RuntimeException
try-with-resources for automatic resource cleanup
Secure exception messages that avoid information leakage
Exception chaining to preserve full error context
Early input validation with IllegalArgumentException/NullPointerException
InterruptedException handling with interrupted-status restoration
@throws JavaDoc documentation, fail-fast principle
Structured logging with correlation IDs, avoiding log-and-throw duplication
API boundary translation via centralized exception mappers
Bounded retry with backoff for idempotent operations only
Timeout enforcement with deadline propagation
Throwable#addSuppressed for secondary cleanup failures
Never catching Throwable/Error
Observability via error metrics
Failure propagation in async CompletionStage code

Scope: The reference is organized by examples (good/bad code patterns) for each core area. Apply recommendations based on applicable examples.

Constraints

Before applying any exception handling changes, ensure the project compiles. If compilation fails, stop immediately — do not proceed until resolved. After applying improvements, run full verification.

MANDATORY: Run ./mvnw compile or mvn compile before applying any changes
SAFETY: If compilation fails, stop immediately — do not proceed until the project is in a valid state
VERIFY: Run ./mvnw clean verify or mvn clean verify after applying improvements
BEFORE APPLYING: Read the reference for detailed good/bad examples, constraints, and safeguards for each exception handling pattern

When to use this skill

Exception handling
Use try-with-resources in Java code
Create exception chaining in Java code
Apply fail-fast validation in Java code

Reference

For detailed guidance, examples, and constraints, see references/123-java-exception-handling.md.

---name: 123-java-exception-handlingdescription: Use when you need to apply Java exception handling best practices — including using specific exception types, managing resources with try-with-resources, securing exception messages, preserving error context via exception chaining, validating inputs early with fail-fast principles, handling thread interruption correctly, documenting exceptions with @throws, enforcing logging policy, translating exceptions at API boundaries, managing retries and idempotency, enforcing timeouts, attaching suppressed exceptions, and propagating failures in async/reactive code. Part of the skills-for-java projectlicense: Apache-2.0---# Java Exception Handling GuidelinesIdentify and apply robust Java exception handling practices to improve error clarity, security, debuggability, and system reliability.**What is covered in this Skill?**- Specific exception types instead of generic `Exception`/`RuntimeException`- try-with-resources for automatic resource cleanup- Secure exception messages that avoid information leakage- Exception chaining to preserve full error context- Early input validation with `IllegalArgumentException`/`NullPointerException`- `InterruptedException` handling with interrupted-status restoration- `@throws` JavaDoc documentation, fail-fast principle- Structured logging with correlation IDs, avoiding log-and-throw duplication- API boundary translation via centralized exception mappers- Bounded retry with backoff for idempotent operations only- Timeout enforcement with deadline propagation- `Throwable#addSuppressed` for secondary cleanup failures- Never catching `Throwable`/`Error`- Observability via error metrics- Failure propagation in async `CompletionStage` code**Scope:** The reference is organized by examples (good/bad code patterns) for each core area. Apply recommendations based on applicable examples.## ConstraintsBefore applying any exception handling changes, ensure the project compiles. If compilation fails, stop immediately — do not proceed until resolved. After applying improvements, run full verification.- **MANDATORY**: Run `./mvnw compile` or `mvn compile` before applying any changes- **SAFETY**: If compilation fails, stop immediately — do not proceed until the project is in a valid state- **VERIFY**: Run `./mvnw clean verify` or `mvn clean verify` after applying improvements- **BEFORE APPLYING**: Read the reference for detailed good/bad examples, constraints, and safeguards for each exception handling pattern## When to use this skill- Exception handling- Use try-with-resources in Java code- Create exception chaining in Java code- Apply fail-fast validation in Java code## ReferenceFor detailed guidance, examples, and constraints, see [references/123-java-exception-handling.md](references/123-java-exception-handling.md).

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