Recent Posts
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Java 8 extracts the first key from the matching value in the map
Suppose I have a map with a given name and last name pair, and I want to find the given name of the first entry in the…… -
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 – how to map the root directory of URL schema directory in servlet mapping in spring MVC?
<servlet-mapping> <servlet-mapping> <servlet-name>testServlet</servlet-name> <url-p…… -
Java / scala BigInteger paste
I have a problem with the Java BigInteger class: I can't paste a large value into BigInteger For example, suppose I wa…… -
Java – find or insert based on Hibernate’s unique key
I'm trying to write a method that will return a hibernate object based on a unique but non - primary key If the entity…… -
Java – why Maven war plugin failed web XML fails if I configure it without failing in the missing web xml？
This is a challenge: Why did this build fail? I have configured Maven's Maven war plugin, which will not be in a missi…… -
jdbc – JT400. Jar disable login screen
Can someone help me? I have a small utility that uses jt400-6.7 Jar to the AS400 server Refer to the following code pr…… -
. Net memory model, variables and test sets: what is guarantee?
I Know. The. Net memory model (in the. Net framework; not compact / micro / Silverlight / mono / XNA / what have you y…… -
Xdebug does not load Windows 7 64 bit PHP 5.4
I have PHP running on Apache I have downloaded what I think is the correct Xdebug compilation DLL for PHP version 5.4 …… -
Java – retrieves the size of the image in the file system
How to use @ L_ 301_ The size of the image retrieved from the local file system of 0 @ (usually JPEG, PNG, JPG and GIF…… -
Java – how to verify the use of Guice scope in testing?
I have some tests. If some Guice ranges are used incorrectly, I want to fail For example, @ singleton should not have …… -
Java – inheritance in static methods
Why does the following code print "master"? public class Main { public static void method() { System.o…… -
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 – map
How to convert map < object, Object > mapping < string, string > in the cleanest way? Is there a way not t…… -
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 – 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…… -
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…… -
Array – use ‘iterator’ instead of ‘VEC’ as much as possible?
Is it considered a good style to accept iterator T when a function takes a series of values as parameters Not VEC t In…… -
What is a good tool for investigating the use of database connections in Java?
What is a good tool for investigating the use of database connections in Java? Developers are supporting a complex Jav…… -
Java – get the instance name of the websphere application server
My web service will run on JBoss app server or websphere application server For both of them, I need to know the insta…… -
Java – how to access method properties using spring AOP (AspectJ style)?
I need to accept some methods and their properties by using annotations as pointcuts, but how do I access them I have …… -
Java has about 100 parallel threads and memory management
I am writing an optimization algorithm to create about 100 threads At present, I start them once (for loop), and then …… -
Java – the best way to copy from one array to another
When I run the following code, there is no copy - what did I do wrong? In addition, is this the best / most effective …… -
Type cast array / vector in rust
What is the usual way to convert an array or vector of one type to another in rust? The desired effect is let x = ~[0 …… -
How to quickly close unresponsive WebSockets in Java spring Tomcat?
I have a real-time application. The client uses WebSockets to connect to the spring framework server running spring bo…… -
Java – what XML data types should be used for money / money?
After reading a few questions about Java data types for money / currency, I decided to use the int / long method to st…… -
Java – what is Class means a class name
. What does class mean, for example, MyClass class？ I understand that when you place the name of a class and the poin…… -
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…… -
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 – 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…… -
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 – 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……