Recent Posts
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java. lang.NoSuchMethodError：javax. servlet. http. HttpServletRequest. startAsync
Do you know why I encountered this error at runtime? java.lang.NoSuchMethodError: javax.servlet.http.HttpServletReques…… -
Java concurrency JDK 1.6: is busy waiting better than signaling? Valid Java #51
Item 51 of Joshua Bloch's "effective Java" does not depend on the thread scheduler, nor does it unnecessarily retain t…… -
Software testing tool – for Java
Can anyone list five software "software tests" in a java project? I need to learn 5. What do you recommend? Solution &…… -
Java – disable all reports in Maven’s project info reports plugin
I want to generate custom reports through Maven's site plug-in, but only this custom report, instead of all reports ge…… -
Java – strange gradle IntelliJ error
When I tried to import the gradle project in IntelliJ idea, the following error occurred: The beginning of the IDE log…… -
Is there a data structure / library in the memory OLAP / pivot table in Java / Scala?
Related issues This question is very relevant, but 2 years old: in memory OLAP engine in Java background I want to cre…… -
Java – Android Google Maps V2 – SD card as tile provider
I am using Google Maps API V2 to develop an Android application. I have to use offline tiles. I have all tiles of the …… -
JavaFX 8 datepicker function
I just started using the new JavaFX 8 control datepicker In datepicker user experience documentation, it claims that i…… -
Java – using messagepack with Android
Has anyone tried to use @ l_ 502_ 0 @ app using messagepack? Caused by: java.lang.ExceptionInInitializerError at org…… -
Java – should private instance variables be accessed in constructors through getter and setter methods?
I know that private instance variables are accessed through their public getter and setter methods But when I generate…… -
Java – Android UI element animation
I'm trying to animate UI elements I want to move an EditText and a button from the middle of the screen and display th…… -
Unit test – when the result type is tile, the unit test fails
I tried to test my action class with the JUnit plug - in This action is as follows: @Action(value = "default",results …… -
Java – post a set of custom objects to struts 2 actions
How to publish a set of custom objects to struts 2 operations in Java? For example, if I have the following Java objec…… -
Avoid implementing methods in interfaces – Java
I have the following interface: public interface a { public void m1(); public void m2(); public void m3();…… -
Java – run the compiled jar file in Jenkins
I tried to run the executable jar file through Jenkins What I want to achieve here is that I create an executable jar …… -
Java – three questions about doing a lot of computing
This is just a series of questions about doing a lot of calculations Either I can't find the answer online, or I need …… -
Is the Java multicastsocket thread safe?
I have two themes It seems to work normally, but I still doubt it Can these two threads use the same multicast socket …… -
Java – hibernate criteriabuilder connects multiple tables
I'm trying to add four tables using hibernate criteriabuilder @Entity public class BuildDetails { @Id private …… -
Java – who calls the class initializer method and when?
I know that the new DUP, invocation and astere bytecode patterns will call the instance initialization method < ini…… -
Java – add some days for jodatime instant
I'm trying to write a simple utility method to add an integer day to joda time instant This is my first attempt /** *…… -
What is monad emulation in Java?
I know that in scala and many other functional languages, monad is mainly an interface implementation (for example, us…… -
Java – how to make jtidy format HTML documents well?
I'm using jtidy v.r938 I'm using this code to try to clean up the page final Tidy tidy = new Tidy(); tidy.setQuiet(fal…… -
Java – Apache beam – integration test of unbounded pcollection
We are building integration tests for the Apache beam pipeline and have encountered some problems For background infor…… -
Java – use beans to send mail from JSF pages
I am using JSF and primefaces to create a web application. My problem is how to send e-mail through the contact form o…… -
Java – parsing XML from httppost response
During HTTP post, I store the response as a string response HttpResponse httpresponse = httpclient.execute(httppost); …… -
Java – separate Classpaths for test code and main code
I have two source code trees in my eclipse Java application One is "SRC" and the other is "test" Each contains Directo…… -
Java – MapReduce job without mapper
This may be a very basic question, but it is still helpful for many novices like me Can I do Mr work without a mapper?…… -
Java – Maven jetty plug-in daemon elements are not allowed here
I'm trying to configure the project's POM XML file I want it to start the jetty server during the test phase To do thi…… -
Java – add jar classpath in Ubuntu
This may be a common problem, but I can't add Classpaths to jar files in Ubuntu I have given all the details I know be…… -
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Java – how to avoid instanceof when using list in design pattern
Imagine that you have a menu and each dish should be in multiple languages (French, English, Arabic...) The dish class……