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What is the use of the transient keyword in Java?

Use the transient keyword because it prevents the fields from being serialized. 1. Transient is used to mark instance fields that do not want to be serialized; 2. When serialized, fields modified by transient will be skipped; 3. After deserialization, the value of the transient field is the default value, such as the object is null, the integer is 0, and the boolean is false; 4. Transient is not suitable for static fields, because the static field itself will not be serialized; 5. Common uses include protecting sensitive information, excluding temporary data, avoiding serialized resource references, or improving performance; 6. If you need to restore the transient field, you can override the readObject() method to achieve custom logic. therefore

Aug 24, 2025 am 09:40 AM

java

Loading GLSL shader in Vulkan using Java

This article describes how to load and use GLSL shaders using Vulkan API in Java. The core step is to compile the GLSL shader into SPIR-V binary format and load it into the Vulkan pipeline. By using tools like ShaderSPIRVUtils, the compilation process can be simplified and the shader code executes correctly in the Vulkan environment. This article will provide detailed steps and examples to help developers integrate GLSL shaders in Java Vulkan projects.

Aug 24, 2025 am 09:21 AM

Loading GLSL shader file in Vulkan using Java

This article describes how to load and use GLSL shader files using the Vulkan API in Java. This highlights the compilation of GLSL shaders into SPIR-V binary format, and provides a GitHub tutorial link to help developers get started quickly. Through this article, you will be able to master the key steps in integrating GLSL shaders in your Java Vulkan program.

Aug 24, 2025 am 09:15 AM

Logback log output alignment practice in Spring Boot

This article will explore in-depth how to configure the Logback log framework to achieve accurate alignment of SLF4J log output in Spring Boot applications. The core is to understand the separation of SLF4J as a log facade and Logback as a specific implementation, and to use Logback's powerful pattern formatting function, especially width and alignment modifiers, to optimize the readability of the log and ensure the neat arrangement of key elements such as class names and separators.

Aug 24, 2025 am 09:03 AM

What is a NoClassDefFoundError in Java?

ANoClassDefFoundErroroccurswhenaclasswaspresentduringcompiletimebutcannotbefoundorinitializedatruntime,typicallyduetoclasspathissuesorstaticinitializationfailures;commoncausesincludemissingJARfiles,incorrectbuildprocesses,orclassinitializationexcepti

Aug 24, 2025 am 08:37 AM

java

How to use the finally block in Java

Thefinallyblockalwaysexecutesafteratry-catchblock,regardlessofwhetheranexceptionoccursorishandled,ensuringcriticalcleanupcoderuns.2.Itiscommonlyusedtocloseresourceslikefiles,databaseconnections,ornetworkstreams,asshownwithFileReaderbeingclosedinafina

Aug 24, 2025 am 08:28 AM

java

How to tune the JVM

JVM tuning requires first clarifying application requirements, and then targeted adjustments through monitoring data. 1. Analyze application behavior: Use jstat, GC log and other tools to judge memory and CPU usage patterns. 2. Reasonably set the heap size: -Xms and -Xmx are set to the same value (such as -Xms2g-Xmx2g), which will not exceed 70-80% of the physical memory. 3. Choose the appropriate garbage collector: use -XX: UseParallelGC for throughput first, use -XX: UseG1GC for balanced scenarios, and choose -XX: UseZGC or Shenandoah for ultra-low latency. 4. Optimize for G1GC: Set -XX:MaxGCPauseMillis=200 and other parameters to control the pause time.

Aug 24, 2025 am 08:19 AM

java jvm tuning

How to create a thread-safe singleton in Java

Double-checkedlockingwithvolatileensuresthread-safelazyinitializationbyusingavolatilevariableandsynchronizedblockonlyduringinstancecreation.2.Staticinnerclass(BillPugh)isthread-safe,lazy-loaded,andreliesonJVMclassloadingmechanicswithoutexplicitsynchr

Aug 24, 2025 am 08:12 AM

what are the different types of inner classes in java

Java has four internal classes: member internal classes, static nested classes, local internal classes and anonymous internal classes. The member internal classes are non-static and need to be created through external class instances, which can access all members of the external class including private members; static nested classes are static and do not rely on external class instances, and can only access static members of the external class; local internal classes are defined in methods or code blocks, and can only access final or effectively final variables within the scope; anonymous internal classes have no name, and are used to temporarily implement interfaces or inheritance classes. They are often used for function interface implementation before event processing or functional programming. Since Java8, they are mostly replaced by lambda expressions; which internal class is chosen depends on whether they need to access external instances and scope scope

Aug 24, 2025 am 08:04 AM

Search and array return practice of prime numbers in specified range in Java

This tutorial details how to efficiently find all prime numbers in a specified range in Java and collect the results into an integer array to return. The article covers prime number judgment methods, dynamic storage of results using ArrayList, and key technologies for converting lists into arrays using Java Stream API, and emphasizes best practices for code structure and output to ensure that core logic is separated from output display.

Aug 24, 2025 am 08:00 AM

Solve the MySQL data retrieval null pointer exception in Spring Boot JPA

This article aims to help developers solve the NullPointerException issue encountered when retrieving data from a MySQL database using Spring Boot JPA. By analyzing entity relationship mapping, Repository queries, and potential configuration errors, this article provides a complete set of troubleshooting and problem solving solutions, with code examples and precautions to ensure the correctness and stability of data retrieval.

Aug 24, 2025 am 07:54 AM

What is the difference between JDK, JRE, and JVM in Java?

JVMistheruntimeenginethatexecutesJavabytecodeandisplatform-specific.2.JREincludestheJVMandcorelibrariesneededtorunJavaapplicationsbutlacksdevelopmenttools.3.JDKcontainstheJREandadditionaldevelopmenttoolslikejavacandjdb,makingitessentialforwritingandc

Aug 24, 2025 am 07:40 AM

Common reasons and solutions for Android Dialog not to be turned off

This article provides a common solution to the problem that Dialog cannot be closed normally in Android development. By analyzing the timing of Dialog creation and destruction and scope issues, we explain how to correctly display and close custom Dialogs, and give suggestions for optimizing Dialog code to ensure that Dialog works as expected.

Aug 24, 2025 am 07:30 AM

Oracle SQL date addition: Avoid implicit conversion traps and correct practices

When performing date addition operations in Oracle databases, if you encounter year calculation errors (such as 2082 becomes 1982), it is usually caused by implicit date conversion and NLS_DATE_FORMAT settings of the session (especially the RR and RRRR format models). This article will explore the reasons for this issue in depth and demonstrate its impact through sample code, ultimately providing best practices for safe and accurate date addition using direct date arithmetic and TRUNC functions, avoid unnecessary format conversions, and ensure the correctness of date calculations.

Aug 24, 2025 am 07:21 AM