Tagged articles

127 articles

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Jun 9, 2020 · Backend Development

Unified Exception Handling in Spring Boot Using @ControllerAdvice, Assert, and Enum‑Based Error Codes

The article explains how to replace repetitive try‑catch blocks with a unified exception handling mechanism in Spring Boot by leveraging @ControllerAdvice, custom BaseException, enum‑driven error codes, Assert utilities, and standardized response objects to improve code readability and maintainability.

AssertEnumException Handling

0 likes · 21 min read

Unified Exception Handling in Spring Boot Using @ControllerAdvice, Assert, and Enum‑Based Error Codes

Selected Java Interview Questions

Jun 7, 2020 · Backend Development

Unified Exception Handling in Spring: Using @ControllerAdvice, Assert, and Enum for Clean Code

This article explains how to replace repetitive try‑catch blocks in Java Spring applications with a unified exception handling mechanism that leverages @ControllerAdvice, custom Assert utilities, and an enum‑based error‑code system to produce clean, maintainable backend code.

AssertControllerAdviceEnum

0 likes · 22 min read

Unified Exception Handling in Spring: Using @ControllerAdvice, Assert, and Enum for Clean Code

Java Backend Technology

Jun 4, 2020 · Backend Development

Mastering Unified Exception Handling in Spring: Clean Code with Assertions and Enum‑Based Errors

This article explains how to replace repetitive try‑catch blocks in Java Spring applications with a unified exception handling strategy that leverages @ControllerAdvice, custom Assert utilities, and enum‑driven error codes to produce cleaner, more maintainable backend code.

AssertControllerAdviceEnum

0 likes · 23 min read

Mastering Unified Exception Handling in Spring: Clean Code with Assertions and Enum‑Based Errors

Huawei Cloud Developer Alliance

Jun 1, 2020 · Fundamentals

Master Java Singleton: DCL, Volatile, Static Inner Class & Enum Explained

This article explores several advanced Java singleton implementations—including double‑check locking with volatile, static inner‑class lazy loading, and enum‑based singletons—explaining their mechanisms, thread‑safety benefits, and trade‑offs for modern backend development.

ConcurrencyDCLEnum

0 likes · 8 min read

Master Java Singleton: DCL, Volatile, Static Inner Class & Enum Explained

Selected Java Interview Questions

May 9, 2020 · Fundamentals

Java Singleton Pattern: Lazy, Eager, Static Inner Class, Enum, and Double-Checked Locking

This article explains the Java Singleton pattern, covering lazy (thread‑unsafe), eager, static inner‑class, enum, and double‑checked locking implementations, discusses their thread‑safety, performance, and serialization issues, and provides complete code examples for interview preparation.

EnumJavaSingleton

0 likes · 6 min read

Java Singleton Pattern: Lazy, Eager, Static Inner Class, Enum, and Double-Checked Locking

Java Backend Technology

May 4, 2020 · Backend Development

Mastering Unified Exception Handling in Spring: Clean Code, Better Errors

This article explains how to replace noisy try‑catch blocks with Spring's @ControllerAdvice and custom Assert utilities, using enums for error codes, unified response structures, and practical MyBatis‑Plus examples to achieve clean, maintainable backend exception handling.

AssertEnumException Handling

0 likes · 23 min read

Mastering Unified Exception Handling in Spring: Clean Code, Better Errors

Architect's Tech Stack

May 3, 2020 · Backend Development

Unified Exception Handling in Spring Boot: Reducing Try‑Catch Boilerplate with @ControllerAdvice, Assert Utilities, and Enum‑Based Error Codes

This article explains how to implement unified exception handling in Spring Boot using @ControllerAdvice and custom Assert utilities, demonstrates reducing repetitive try‑catch blocks with enum‑based error codes, and shows practical testing of various error scenarios including 404, validation, and database failures.

AssertEnumUnified response

0 likes · 22 min read

Unified Exception Handling in Spring Boot: Reducing Try‑Catch Boilerplate with @ControllerAdvice, Assert Utilities, and Enum‑Based Error Codes

Java Captain

May 1, 2020 · Backend Development

Unified Exception Handling in Spring Boot Using Assert and Enum-based Error Codes

This article demonstrates how to replace repetitive try‑catch blocks in Java Spring applications with a unified exception handling approach that leverages @ControllerAdvice, custom Assert utilities, and enum‑based error codes to produce clean, maintainable, and internationalized error responses across controllers and services.

AssertEnumException Handling

0 likes · 20 min read

Unified Exception Handling in Spring Boot Using Assert and Enum-based Error Codes

Programmer DD

Jan 2, 2020 · Backend Development

Why Do Some Developers Hate Using Enums in API Design?

The article examines why enums, while type‑safe and convenient for input parameters, are often criticized in API return values due to their lack of extensibility and the risk of deserialization errors when newer enum constants appear after version upgrades.

Backend DevelopmentEnumJava

0 likes · 4 min read

Why Do Some Developers Hate Using Enums in API Design?

Java Captain

Jan 1, 2020 · Fundamentals

Why Enums Are Considered Poor Choices for API Return Values

The article explains why using enums as API return values is often criticized, highlighting their lack of extensibility, potential serialization errors when newer enum values appear, and contrasting this with the safety they provide as input parameters, illustrated with Java examples and community opinions.

EnumJavaSoftware Architecture

0 likes · 4 min read

Why Enums Are Considered Poor Choices for API Return Values

Selected Java Interview Questions

Oct 20, 2019 · Fundamentals

Java Singleton Pattern Implementations and Variants

This article explains four main categories of Java singleton implementations—eager (hungry), lazy (lazy), holder, and enum—detailing their basic forms, variations, thread‑safety characteristics, performance trade‑offs, and code examples, while also discussing pitfalls such as reflection and serialization.

EnumJavaSingleton

0 likes · 10 min read

Java Singleton Pattern Implementations and Variants

ITFLY8 Architecture Home

Sep 26, 2019 · Databases

Designing Effective Order Status Fields: Best Practices and Schema Choices

This article examines common disputes in designing an order status column, analyzes business actions and state transitions, proposes a concise set of core statuses, discusses dictionary representation options, and recommends using VARCHAR2 with a numeric enum for scalable, maintainable database design.

EnumSQLState Machine

0 likes · 18 min read

Designing Effective Order Status Fields: Best Practices and Schema Choices

Programmer DD

Sep 3, 2019 · Backend Development

Mastering Java State Machines with Enums: A Practical Guide

This article explains how Java developers can replace cumbersome if‑else status handling with a finite state machine implemented via enums, illustrating concepts, design patterns, and a complete example of an order‑delivery workflow, complete with diagrams and sample code.

Backend DevelopmentEnumJava

0 likes · 6 min read

Mastering Java State Machines with Enums: A Practical Guide

Programmer DD

Aug 4, 2019 · Backend Development

Master MyBatis TypeHandler: Elegant Enum Mapping and Custom Handlers

Learn how to replace fragile numeric status codes with clean enum handling in Java using MyBatis TypeHandler, explore built‑in handlers like EnumOrdinalTypeHandler and EnumTypeHandler, and create custom handlers for seamless database‑Java type conversion, complete with configuration tips and practical examples.

EnumJavaMyBatis

0 likes · 9 min read

Master MyBatis TypeHandler: Elegant Enum Mapping and Custom Handlers

Java Backend Technology

Jun 27, 2019 · Backend Development

Is Your Java Singleton Really a Singleton? Thread, Reflection & Serialization Pitfalls

This article examines various Java singleton implementations—eager, lazy, double‑checked locking, static inner class, enum, and Kotlin object—analyzing their thread safety, reflection and serialization vulnerabilities, and shows how to harden them using volatile, constructor guards, and readResolve.

EnumJavaReflection

0 likes · 12 min read

Is Your Java Singleton Really a Singleton? Thread, Reflection & Serialization Pitfalls

Aikesheng Open Source Community

Jun 6, 2019 · Databases

Enum-Based Sharding Algorithm in DBLE Middleware: Configuration, Comparison, and Operational Guidelines

This article explains DBLE's enum-based sharding algorithm, how it maps user-defined enum values to shard nodes, compares it with MyCat's approach, and provides development, operational, and configuration best practices, including code examples and mapping file format guidelines.

DBLEEnum

0 likes · 6 min read

Enum-Based Sharding Algorithm in DBLE Middleware: Configuration, Comparison, and Operational Guidelines

Java Captain

Mar 9, 2019 · Fundamentals

Understanding Java Enums: Usage, Switch Cases, Singleton Implementation, and Database Integration

This article explores Java enums in depth, covering their basic definition, typical usage patterns such as iteration and switch statements, implementing singletons, integrating with databases via MyBatis type handlers, and addressing common misconceptions about memory consumption, illustrating each concept with clear code examples.

DatabaseEnumJava

0 likes · 7 min read

Understanding Java Enums: Usage, Switch Cases, Singleton Implementation, and Database Integration

Java Captain

Oct 2, 2018 · Fundamentals

Understanding the Singleton Design Pattern in Java: Lazy, Eager, Double‑Check, Volatile, Static Inner Class and Enum Implementations

This article explains the Singleton design pattern in Java, covering its definition, the differences between lazy and eager implementations, thread‑safety issues, multiple code versions (simple, synchronized, double‑checked locking, volatile), and alternative approaches using static inner classes and enums, while discussing atomic operations and instruction reordering.

EnumJavaSingleton

0 likes · 14 min read

Understanding the Singleton Design Pattern in Java: Lazy, Eager, Double‑Check, Volatile, Static Inner Class and Enum Implementations

Senior Brother's Insights

Aug 23, 2018 · Fundamentals

Mastering the Singleton Pattern in Java: Eager, Lazy, Double‑Check, and More

Explore the GOF 23 design patterns with a deep dive into the Singleton pattern, covering its purpose, characteristics, comparison to static classes, and multiple Java implementations—including eager, lazy, double‑checked locking, volatile, static inner class, and enum approaches—plus Spring’s real‑world usage.

Design PatternsEnumJava

0 likes · 12 min read

Mastering the Singleton Pattern in Java: Eager, Lazy, Double‑Check, and More

Java Backend Technology

Apr 17, 2018 · Backend Development

Mastering the Singleton Pattern in Java: Eager, Lazy, and Thread‑Safe Implementations

This article explains the concept of design patterns and dives deep into the Singleton pattern in Java, covering its purpose, eager and lazy implementations, thread‑safety challenges, double‑checked locking, volatile usage, static inner class, and enum approaches, while illustrating each with clear code examples and diagrams.

Double-Check LockingEnumJava

0 likes · 11 min read

Mastering the Singleton Pattern in Java: Eager, Lazy, and Thread‑Safe Implementations

Java Captain

Apr 4, 2018 · Fundamentals

Comprehensive Guide to Java Enums: Constants, Switch Statements, Custom Methods, Overriding, Interfaces, and Collections

This article explains how Java enums introduced in JDK 1.5 can be used as grouped constants, in switch statements, to hold fields and methods, to override behavior, to implement interfaces, and to work with EnumSet and EnumMap collections, providing clear code examples for each use case.

EnumJavacode

0 likes · 5 min read

Comprehensive Guide to Java Enums: Constants, Switch Statements, Custom Methods, Overriding, Interfaces, and Collections

Programmer DD

Dec 6, 2017 · Fundamentals

Mastering Java Singleton: From Lazy Initialization to Enum with Thread‑Safety

This article walks through multiple Java Singleton implementations—lazy initialization, double‑checked locking, volatile‑protected, static‑inner‑class, and enum—explaining their thread‑safety characteristics, the pitfalls of instruction reordering, and how reflection and serialization can break or preserve the pattern.

EnumJavaSingleton

0 likes · 10 min read

Mastering Java Singleton: From Lazy Initialization to Enum with Thread‑Safety

Senior Brother's Insights

Dec 4, 2017 · Fundamentals

Mastering Thread‑Safe Singleton in Java: Double‑Check, Static Holder, Enum & Reflection Hacks

Explore multiple Java singleton implementations—including a thread‑safe double‑checked locking version, a static inner‑class approach, an enum‑based solution, and a reflection‑based attack—while learning their key technical details, advantages, pitfalls, and how to protect against serialization and reflection vulnerabilities.

EnumJavaReflection

0 likes · 6 min read

Mastering Thread‑Safe Singleton in Java: Double‑Check, Static Holder, Enum & Reflection Hacks

Hujiang Technology

Jul 6, 2017 · Fundamentals

Kotlin Class Features: Constructors, Modifiers, and Special Classes

This article explains Kotlin class declarations, covering primary and secondary constructors, visibility modifiers, and special class types such as enums, sealed classes, and data classes, with code examples illustrating each concept.

ClassConstructorEnum

0 likes · 7 min read

Kotlin Class Features: Constructors, Modifiers, and Special Classes

Tencent TDS Service

Mar 9, 2017 · Mobile Development

Mastering the Singleton Pattern in Android: Pitfalls, Best Practices, and Real‑World Implementations

This article explores the Singleton design pattern in depth, covering its definition, various Java implementations, thread‑safety concerns, serialization, reflection and cloning pitfalls, Android‑specific considerations, and practical recommendations for using singletons effectively in mobile projects.

EnumJavaSingleton

0 likes · 38 min read

Mastering the Singleton Pattern in Android: Pitfalls, Best Practices, and Real‑World Implementations

Java Backend Technology

Sep 24, 2016 · Backend Development

How to Leverage Java Enums for Meaningful UI Labels and DB Mapping

This article explains how to define Java enum classes, demonstrates their usage with code snippets, and shows a practical technique for converting numeric database values into readable Chinese labels for display in user interfaces.

DatabaseEnumJava

0 likes · 2 min read

How to Leverage Java Enums for Meaningful UI Labels and DB Mapping

Qunar Tech Salon

Jul 19, 2015 · Backend Development

Solving Enum TypeHandler Issues in MyBatis Using Inheritance and Annotations

This article explains how to address repetitive enum TypeHandler implementations in MyBatis by using inheritance and annotation-based approaches, presents concrete code examples, discusses their advantages and limitations, and compares them with MyBatis's built‑in EnumTypeHandler.

EnumInheritanceJava

0 likes · 6 min read

Solving Enum TypeHandler Issues in MyBatis Using Inheritance and Annotations