Java
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Java ‘prototype’ mode – New vs clone vs class newInstance
In my project, some "prototype" factories create instances by cloning the final private instances The authors of these…… -
Java – runtime dependency injection and spring
My current project is to use spring, and our architect decided to let spring manage services, repositories and factory…… -
The Java – JAXB xmladapter method does not throw an exception
I am using JAXB xmladapter to organize and ungroup Boolean values The application's XML file will also be accessed by …… -
Java – does the terminal operation on the stream close the source?
See English answers > do terminal operations close the stream? two Path directory = Paths.get(/* some directory */)…… -
Java – statet in eclipse and R
I've managed to install statet into eclipse. I have a java project called "test" with some code I hope to be able to T…… -
Java streams: grouping lists into maps
How do I use Java streams to do the following? Suppose I have the following classes: class Foo { Bar b; } class B…… -
Java – log4j is recorded twice in different formats
I don't know why log4j is attached twice in different formats Has anyone met before? This is my log4j XML file: <lo…… -
Java – policy design pattern – select policies and counters
I'm programming in Java, but this is a more design question, so any OO programmer can answer this question I have a qu…… -
Java – mybatis column mapping
I use mybatis 3.0 3 and there is a problem: some columns in the database have underlined names, which should be mapped…… -
What is the best way to transfer files using Java?
I'm writing a code to upload files from the client to my server, and the performance is not as fast as I think I am no…… -
Java – spring: init method, postconstruct, afterpropertieset: when to use others?
There are many initialization options available in the spring bean lifecycle Init method, postconstruct annotation, af…… -
Java – format slf4j to record message types using colors
I am using slf4j to log in to my java application It involves a large number of logs and log monitoring Any suggestion…… -
LRU caching in java with generics and O (1) operations
This is a question in the interview The idea is to define a data structure instead of using Java's built-in LinkedHash…… -
Object pool for Java wrapper and string
As we all know, sometimes Java uses object pools as wrappers and string types, and sometimes it doesn't For example: I…… -
Java – how to compare the instance type of an object with a generic type?
How do I write this code in Java? public class ComponentsManager { private List<IComponent> list = …… -
Java – how do I go from XML spring scheduling configuration to annotation / code configuration?
I am trying to convert the following spring task XML configuration to a pure code / annotation version: <task:execu…… -
Java – Open Source improvement or replacement of swing components
I have developed many desktop Java applications using swing, and swing is very powerful (once you get its suspense). T…… -
Java – Apache POI uses HSSF much faster than xssf – what’s next?
I use Apache POI to parse There were some problems with xlsx files - I received Java Lang. outofmemoryerror: Java heap…… -
Java – how to suppress multiple findbugs warnings on the same line of code
I recently found findbugs @ edu umd. cs. findbugs. annotations. Suppresswarnings annotation, which is very cool and al…… -
Java – audiorecord object is not initialized in the project
When I try to record audio with my nexus 5 using the following code record = new AudioRecord(MediaRecorder.AudioSource…… -
Automatic boxing should be avoided in Java
I'd like to ask if automatic boxing should be avoided in Java Because some methods need a primitive type "double", but…… -
High end 2D Java (SE) graphics library [closed]
I am looking for a high-end graphics library for Java Standard Edition I know some fairly low-level libraries: AWT / s…… -
Java – PGP data encryption for yubico OpenPGP smart card
I try to implement PGP encryption in Java applications based on yubikey Neo OpenPGP smart card applet It seems to be a…… -
The mysterious veil of Java EE 6 annotation inheritance
I use EJB inheritance in several schemes, and sometimes use annotations in superclasses, such as this general entityda…… -
Java – PGP data encryption for yubico OpenPGP smart card
I try to implement PGP encryption in Java applications based on yubikey Neo OpenPGP smart card applet It seems to be a…… -
Java & rabbitmq – queuing and multithreading – or couchbase as a job queue
I have a job distributor that publishes news on different channels In addition, I want two (and later) consumers to wo…… -
Algorithm for filtering / standardizing bad signals
Use GPS to process tracking applications What algorithm should I run to filter out bad signals? It looks like an appli…… -
Java – retrofitting with firebase
Ask anyone for help This is my API method @POST("/user/new.json") Call createUser(@Body User user); This is my phone i…… -
The equivalent of the C shift operator in Java?
C shift operator < do not loop, for example, if you do this: // C++ int a = 1; cout << (a<<38); You get…… -
Java – tzupdater and tzdata2016g publishing failed
TZUpdater 2.1. 0 failed to publish on tzdata2016g For Java 8, it failed, "source directory does not contain file: vers…… -
Superscript in Java string
Does Java string support superscripts in strings? If so, then how to use it, I have searched web pages and APIs, but I…… -
Java – parsing relative paths when loading XSLT files
I need to use Apache FOP for XSL transformation. I have the following code: //Setup FOP Fop fop = fopFactory.newFop(Mi……