包含标签：Java 的文章
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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…… -
How to use java to access spreadsheets in open document format (. ODS)?
I want to read, write and create spreadsheets in Java open document format And I want the generated Java program to ru…… -
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…… -
We can reject serialized Java objects instead of giving the transient keyword
We can avoid serializing fields by using the transient keyword Solution http://java.sun.com/javase/6/docs/platform/ser…… -
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…… -
Java – call stream() Reduce () in the list has only one element
I am a new function programmer of Java and want to know how I should write code to avoid NPE (for example): myList.str…… -
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 – static variables that span multiple different subclasses – corrected
I want to know that if I define a basic activity object, all my activities are subclasses Then I declare a static vari…… -
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…… -
What does this Java error mean?
java.lang.indexoutofboundsexception: Index: 1365,Size: 1365 java.lang.indexoutofboundsexception: Index: 1365,Size: 136…… -
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…… -
Write a pattern method in Java to find the most common elements in an array
The question is: Here's my code that almost works, except for single element arrays publicstaticintmode(int[]n) { Arra…… -
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…… -
VHDL – why can’t I add this ` STD_ logic_ vector`
What happened here? Why do I get an 'operator parameter type mismatch', and what should I do to solve it? -- -- 32-bit…… -
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 – partially ordered comparator
How to implement Java. Net that sorts its elements according to the partial order relationship util. Comparator？ For …… -
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 – compare strings to JSTL
I have two strings that I need to compare, but even if they have the same value or different, it always enters the sta…… -
Java – can we call the service () method from the destroy () method in the servlet?
This is one of the questions I interviewed the other day: Can I call the service () method from destroy()? Thank you i…… -
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…… -
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…… -
Multithreading – issue a QT signal from a non QT thread or issue a QT main event loop at 4.5
I call an emit signal1 () from a non QT thread It is just a pthread (pthread_create()), which calls a signaled QObject…… -
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…… -
Java – how to properly end eclipse startup configuration execution?
I am writing an eclipse plug - in that provides a new startup configuration type It can be expected that when the exec…… -
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 – PMD for inferring arrayisredreddirectly direct rules
PMD has a rule named arrayisstoreddirectly in the sun security rule set: This is their example: public class Foo { pr…… -
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…… -
Java – map
How to convert map < object, Object > mapping < string, string > in the cleanest way? Is there a way not t…… -
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 – EntityManager. Merge didn’t do anything
I have a user entity: @Entity @Table( name = "bi_user" ) @SequenceGenerator( name = "USER_SEQ_GEN",sequenceName = "USE…… -
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…… -
Java – inheritance in static methods
Why does the following code print "master"? public class Main { public static void method() { System.o……