Article Tags
Article Tags
A complete tutorial on using IntStream to implement dynamic mapping of double lists in Java 8
This article explains in detail how to perform index alignment mapping on two parallel lists (such as domain and code) in Java8StreamAPI, replacing static parameter calls, and realizing safe, concise, and functional dynamic method calls through IntStream.range.
Mar 03, 2026 pm 01:12 PM
How to configure code formatting templates for Java projects_Java team development specifications
To import the Java code formatted XML template into IntelliJ IDEA, you need to go through "Editor→CodeStyle→Java→Scheme→ImportScheme", and the XML must match the IDEA version (such as 173) for the root node and version. After importing, you need to click "Setfrom...→Default" to take effect; .editorconfig alone cannot control Java-specific format rules; it is recommended to combine the google-java-formatGradle plug-in to achieve unified formatting across environments.
Mar 03, 2026 pm 01:06 PM
How to determine whether a year is a leap year in Java_Comprehensive exercise on logical operators
The leap year judgment rule is: divisible by 4 and not divisible by 100, or divisible by 400; in Java, it is recommended to use ((year%4==0)&&(year 0!=0))||(year@0==0), and Year.isLeap() or LocalDate.isLeapYear() is preferred.
Mar 03, 2026 pm 01:03 PM
How to adjust the object promotion threshold (Tenuring Threshold) in Java_JVM tuning parameters
-XX:MaxTenuringThreshold is the upper limit of the promotion age rather than a fixed threshold. The JVM dynamically adjusts the actual promotion age according to the Survivor space; setting it to 15 is often invalid because the default is 15 and the adaptive strategy will actively reduce it; new GCs such as G1/ZGC do not use this parameter; Desiredsurvivorsize and newthreshold should be observed in combination with GC logs, and SurvivorRatio or Xmn should be tuned first.
Mar 03, 2026 pm 01:00 PM
How to use the StringJoiner class in Java_Java 8 high-performance string connection
StringJoiner is a tool class introduced in Java 8 dedicated to dynamic splicing with delimiters. It is suitable for scenarios that require multiple adds, support prefixes and suffixes, and decouple splicing logic, such as SQL conditions and HTTP parameter construction. When constructing, pay attention to delimiter first, prefix/suffix last, and cannot be modified. Null values need to be filtered manually.
Mar 03, 2026 pm 12:57 PM
How to correctly configure Maven dependencies and fix XML parsing failure
This article explains in detail the common causes of db.parse() errors when using DOM to parse XML in Java. It focuses on incorrect usage (such as misrepresenting the InputSource object string), missing core XML parsing dependencies, and JakartaEE migration adaptation issues for JDK17. It also provides a directly runnable repair solution and complete pom.xml configuration.
Mar 03, 2026 pm 12:54 PM
Efficient incremental data synchronization and scheduled refresh solution between Oracle databases
This article introduces how to safely and efficiently implement periodic synchronization of filtered data between two Oracle databases. It focuses on recommending a native, low-intrusion, and highly maintainable automation solution based on materialized view (MaterializedView) combined with database link (DBLink) and DBMS_SCHEDULER.
Mar 03, 2026 pm 12:51 PM
Solution to correctly calculate minute difference between two dates in Java
This article explains in detail the root cause of the UnsupportedTemporalTypeException:Unsupportedunit:Seconds exception, and provides a safe and accurate minute difference calculation method based on LocalDate to avoid runtime crashes caused by misuse of Duration.between().
Mar 03, 2026 pm 12:48 PM
How to properly turn off RESTEasy's proxy WebTarget client
This article explains in detail how to safely and reliably release underlying HTTP client resources when using RESTEasyWebTarget.proxy() to create a typed proxy, avoid memory leaks and RESTEASY004687 warnings, and provide a reusable generic encapsulation solution.
Mar 03, 2026 pm 12:45 PM
How to properly handle highly concurrent database operations in SQLite?
This article explains in detail the concurrency control issues of SQLite in multi-threaded client scenarios, focusing on solving "databaseislocked" and "uniqueconstraintfailed" exceptions, emphasizing transaction minimization, explicit management and isolation level optimization, rather than coarse-grained thread locks.
Mar 03, 2026 pm 12:42 PM
How to persist a Map keyed by entities in Hibernate and Spring
This article explains in detail how to use Hibernate to correctly persist Map type fields, where the key is a JPA entity class; it focuses on correcting the common mistakes of mixing @OneToMany and @ElementCollection, and recommends using @MapKeyJoinColumn to implement foreign key association mapping.
Mar 03, 2026 pm 12:39 PM
How to correctly configure dependencies and fix Java XML parsing exceptions
This article explains in detail the common causes of db.parse() exceptions when using DOM to parse XML in Java. It focuses on code logic errors (such as misrepresenting the string "is" is), illegal XML data, and missing core parser dependencies after JakartaEE migration. It also provides directly runnable repair solutions and Maven configurations.
Mar 03, 2026 pm 12:36 PM
Using Jackson to implement deserialization of dynamic enumerations: polymorphic annotations and custom strategies
This article explores the two main strategies for handling dynamic enum deserialization in Java using the Jackson library. For scenarios where different types need to be deserialized into different enumerations at runtime, the article details how to implement custom deserialization logic through Jackson's polymorphic annotations (@JsonTypeInfo and @JsonSubTypes) and the use of @JsonCreator, and provides corresponding code examples and precautions, aiming to help developers flexibly respond to complex enumeration deserialization requirements.
Mar 03, 2026 am 09:39 AM
Object-oriented design and practice of solving quadratic equations in Java
This tutorial aims to guide developers on how to use Java's object-oriented features to elegantly and robustly solve quadratic equations. The article will design a special class to encapsulate equation coefficients and solution logic to avoid the limitations of static methods in complex scenarios, and show in detail how to handle roots under different discriminants, thereby improving the encapsulation, reusability and maintainability of the code.
Mar 03, 2026 am 09:27 AM
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