Java
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Java – spring boot HSQLDB / H2 always displays “port in use” on Windows 10
I am developing a spring boot application. When I try to run the application using an embedded database (HSQLDB or H2,…… -
Java – cannot be in class org apache. log4j. core. layout. Calling factory methods for element jsonlayout in jsonlayout
I tried to log in to JSON format through log4j2 This is my log4j2 XML file: <?xml version="1.0" encoding="UTF-8"?&g…… -
How to convert telegraph API core date: int type to Java date?
See English answers > converting long to date in Java returns 1970 11 There is date: int, a ten digit integer with …… -
Java – “unable to parse: com. Google. Firebase: firebase core: 9.0.0”
I want to use fire base for authentication in my Android application >I created the application, then downloaded th…… -
Java – paging for updates Is it possible?
Do they have some way to handle update paging? @Id private Integer id; @Column private boolean flag; @Column private D…… -
Java – use the recycler view in Android to use two sets of multiple images for data binding at the same time
Our problem is to update multiple images in the recycler view by clicking any single item in the recycler view using d…… -
Java – Android: targetapi is not recognized in the manifest
My list has the following lines: <intent-filter android:autoVerify="true"> But I got a lint warning: Attribute …… -
Java – why is ActiveMQ 20% faster using the memorypersistencedadapter?
I am using active MQ with 99% non persistent themes For some tests where I only use non persistent messages, I have tr…… -
Java – static initializer does not appear to run during JUnit testing
I unit test the method of a static utility class: @Test public void createGenreString() { //Arrange String exp…… -
Java – unable to configure “keep alive” in camel HTTP component
I'm having some trouble setting up the HTTP component correctly Currently, microservices extract JSON content from the…… -
Java – hibernate with long text columns for Oracle and PostgreSQL
I'm trying to make an entity use Oracle (11.2) and PostgreSQL (9.4) in spring boot (1.4.4) applications My entity cont…… -
Java – add index columns to existing spark’s dataframe
I use java to run spark 1.5 I need to attach the ID / index column to the existing dataframe, for example: +---------+…… -
Java – unable to start Android studio
I installed Android studio a month ago and it ran successfully. I used Windows 7 (64 bit). Then I set up a new windows…… -
The Java spring rest API CORS is not applicable to delete requests through jQuery and chrome
I am creating a web front end written in jQuery, which uses the spring framework to send rest requests to rest Web Ser…… -
Java – hyperjaxb: exclude XML elements by XML attribute
I have a predefined XSD as follows: <xs:element name="JavaClass1"> <xs:complexType> <xs:seq…… -
Java – expose implementation information to callers?
In JLS capture conversion, it discusses two methods of writing reverse method signatures: > public static void reve…… -
Dependency in Java – Maven: what impact does EJB type have?
If you declare dependencies in maven, you can add types, such as war, jar, EJB I know that compiling a project of type…… -
Classic singleton and lazy using java 8 performance
Recently, I read an article "be lazy with Java 8", which introduces a method to create inert objects (objects whose in…… -
Java – spring security login 2fa – first check the user name and password, and then request 2fa code when needed
I have set 2fa spring safety The problem is that the 2fa code must now be entered in the same form as the user name / …… -
Java – soap service using NTLM authentication
I tried to create an NTLM engine by following http://hc.apache.org/httpcomponents-client-4.3.x/ntlm.html I use NTLM au…… -
Java – fork and join without main thread
I want to use the thread pool to process the list of items and wait for them to finish If not, I also need to be able …… -
Java – Android ImageView not loaded
I'm using Android ImageView. I put the image in the drawable folder and change the ImageView source to this image But …… -
The correct format between two times in Java
I tried to calculate the number of hours between two in Java I'm using joda time library to format it The program can …… -
JavaFX: cleaning up tableview instances from memory
How should I clean up the tableview instance from memory, From what I learned, >Delete all listeners attached to th…… -
Java – the word cooccurrence in the sentence
I have a large set of sentences (10000) in a file The file contains one sentence per file In the whole set, I want to …… -
Java – Samsung pass SDK to change standby text in fingerprint dialog box
I am using pass SDK v1 2.1. According to the programming guide, there is a method to change the standby text displayed…… -
Java – poor implementation of dynamic programming or slow HashMap?
See English answers > How do I write a correct micro benchmark in Java? 11 I know that recursive functions should n…… -
Java – activity leaked popupwindow window after rotation
When I rotate the device while displaying PopupMenu, a windowleft error appears That's my PopupMenu: private void show…… -
java. Lang. unsatisfiedlinkerror: no implementation was found because the library was not loaded
When it says jnilibs and other libraries When the so file could not be loaded, I was trying to integrate a shared libr…… -
Java – Jackson @ jsonproperty is invalid if the property name is not equal to the field name
I have the following JSON { "kNown-name": "Zevs","approximate-age": 320 } And binding classes public class GodBindin…… -
Java – quartz scheduler does not use JDBC store to insert records in dB
Configure quartz jobs, public static void schedule(IEntity entity,Date startdate) { try { JobDetail job = …… -
Java – why do you accept static final variables in local classes?
I use Google to search widely but to no avail I can't seem to revolve around this concept Why do local classes accept ……