包含标签：Java 的文章
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Java – determine the repository URL for Maven deploy file
I'm using Maven to build a specific project, and in POM, I'm using the Maven shade plug-in to build different variants…… -
Java – why don’t these code blocks give the same result?
So I'm a novice to thread. I wrote a simple program to test and avoid competition conditions My first attempt was to u…… -
Java 8 type inference causes generic types to be omitted at call time
After upgrading to Java 1.8, I encountered a problem with generic methods, which is good for Java 1.6 and 1.7 public c…… -
Java – reducer and MapReduce do not display errors, but do not provide the required output
Sales driver class package mr.map; import org.apache.hadoop.conf.Configuration; import org.apache.hadoop.fs.Path; imp…… -
Java – how to use “size” as the field name in Hibernate / JPA entities?
I have two JPA entities: virtuallot and virtualfiles Virtualfiles extends virtualinode VirtualFile. java @Entity @Tabl…… -
java – System. out. Print causes delay?
See the English answer > do not use system out. Println in server side code 9 package personal; public class Speed…… -
Java – optional part of jax-ws response message
TL; Dr: how can I have an optional < part > in response to < message > for WSDL service I am: >Locate a…… -
Java – you cannot use XML via maven unmarhsal
I have JUnit test, it is unmarshal, my XML object is good, its work! However, when I run the Maven command MVN surefir…… -
Java – how does limit in MySQL query make it possible to cancel flow
I want to know how the limit in the query prevents the application thread read from the MySQL stream from hanging duri…… -
Java – spring MVC – unable to compile classes for JSP
I'm following the spring MVC course of virtualpairprogrammers. There seems to be some problems with the workspace they…… -
Why is Java’s exchange Slot cache line fill like this?
When I read the 'false sharing' mechanism in Java, I was in Java util. concurrent. Exchanger. The following code is fo…… -
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 – 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 – block network calls from SDK Android App
I'm using Google's AdMob SDK, and some kind of initialization occurs during application startup, which basically leads…… -
Java – connect to the network using eclipse
I want to connect my Eclipse Plug-in to the HTTPS URL, but there is a problem because the user needs to accept the cer…… -
Java saves the file using special characters in the file name
I have a problem with java file coding I have a java program that saves the input stream as a file with a given file n…… -
Graphql Java Hello World: failed to add child schema to parent schema
I'm trying to prototype graphql Java（ https://github.com/andimarek/graphql-java ）And start building it from the Hell…… -
java. Lang.illegalstateexception: cannot read line 0 col 0 from cursorwindow
I need to get all the data from the table. I use the following code to perform the same operation in the SQLite dbhelp…… -
Java – Cross class access H2 connection
I'm trying to avoid static and singleton and integrate the local H2 database into my JavaFX application (java8) The ot…… -
Java – single sign on jetty with multiple webappcontext instances
I have an embedded jetty server that iterates over a list of webapps from many different locations (between different …… -
Java – redeployment on wildfly results in OUTOFMEMORY: Metaspace
I am currently investigating our recent meta - space problems One of the main reasons seems to be that duplicate class…… -
Java – download stream files through resttemplate
I have a large file download, which is provided by the restcontroller on one server. I need to stream it through the r…… -
Java – regular expressions: using system. Java out. Println (m.matches()) will not print all matches;
I execute the following code: public static void test() { Pattern p = Pattern.compile("BIP[0-9]{4}E"); Matcher m = …… -
Strange compilation errors for Java generic type parameters and optionals
The following java code cannot be compiled (using javac 1.8.0_121) import java.util.Optional; class B<T> {} pu…… -
Java – dependency exceptions that are not satisfied when creating beans using spring
I'm trying to use JPA for my spring application I have integrated JPA transaction manager & converting localentity…… -
Java – spring security oauth2 refresh token – IllegalStateException, userdetailsservice is required
I am new to spring security and use oauth2 authentication and authorization to develop spring rest API Everything is O…… -
java – JAXB 2. x: Abstract methods are grouped into properties
I have an abstract root class. Let's say a I have several implementation class extensions a A has field annotation and…… -
java – TYPE_ 4BYTE_ ABGR to type_ 3BYTE_ BGR conversion
I have a transparent type_ 4BYTE_ Buffered image of ABGR imagetype. I want to convert it to type_ 3BYTE_ BGR BufferedI…… -
Java – JPA (hibernate): error using @ embeddedid in generic @ mappedsuperclass
I am currently defining JPA entities (many compound keys, but also single column keys) for legacy databases I created …… -
How to use Java facelets as a common template engine in stand-alone applications?
I want to use facelets to generate HTML content I want to reuse the existing taglibs, which is not supported by veloci…… -
Java – why does my swing GUI look different in design from the runtime?
When I use swing to design my GUI, the swing control buttons are gray, and the text easily fits them However, when I r…… -
Java – the best way to implement a complex preferences screen?
For my application, I have a fairly complex set of configuration options for users to choose from I am currently using……