Recent questions tagged Java

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java - Jackson custom JsonSerializer - conditionally call default serializer

What I want is to use default BeanSerializer conditionally for my class's objects: class MyCustomSerializer ... ordinary bean Serialization? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - addr is of illegal length

I am checking whether the ipAddress is in Private Category or not. So I wrote this method below. And I am ... return ia.isSiteLocalAddress(); } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Gradle task assembleDebug failed with exit code 1 (Runtime Exception)

while starting a flutter application on vs code i am getting the following errors. Launching libmain.dart on RMX1801 ... can this be solved? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - DPI of image extracted from PDF with pdfBox

I'm using java pdfBox library to validate single page pdf files with embedded images. I know that pdf file ... files) using pdfBox? Thanks! See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - How to register global databinding for LocalDate in spring mvc?

I'd like to use LocalDate as type in a Servlet created with spring-mvc. The users should be able to provide ... class is never called. But why? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - How to update 2 JCombo Boxs

I have 2 Jcombo Boxs: which is combo1 and combo2 I choose combo1 and I can get information for combo2 but The ... wrong but I don't know where See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - creating cell comments using HSSFClientAnchor in apache poi

Could someone please explain to me how to properly use the Anchors when creating cell comments? Mine ... chf.createRichTextString(message)); See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - JSF2.0 - Handling erroneous Ajax calls with Primefaces 3.0

I have a commandButton in my .xhtml page: <p:commandButton action="#{someone.doSomething()}" ajax="true" ... ? Any help appreciated, thanks. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - How do I use ASCIIFoldingFilter in my Lucene app?

I have a standard Lucene app which searches from an index. My index contains a lot of french terms and I' ... TokenFilter is being used? Thanks. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - How can I capture a long press on a Menu Item?

I have a typical menu and I'm wanting to set a onLongClickListener for one of the items. In other words, I want this ... (); return true; } }); See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Failed to obtain JDBC Driver for MySQL under Tomcat environment

I've been trying to obtain the Driver class for JDBC connection to MySQL. The workstation is running on ... for the suggestions in advance. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - SocketException: socket closed

I am creating a Chat application with Java Sockets, and am getting the SocketException: socket closed when ... run(ServerBackEnd.java:159) See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - How to keep sysout and syserr streams from intermixing?

In my code base is the (very simplified) following: public static void main (String[] args) { ... JarRsrcLoader.main(JarRsrcLoader.java:56) See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Image byte [] to response.outputStream in Grails leads to "Cannot forward after response has been committed"

In my Grails controller I have an image as byte []. I want to write this byte [] directly to the response. ... Exception e -> } } } } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - using volatile keyword

As i understand, if we declare a variable as volatile, then it will not be stored in the local cache. Whenever ... : 0 Thread 2 testValue : 0 See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Flutter https with self signed certificate

I am using flutter to connect with java java server implementation over https. I first tested it to be working using ... ${response.body}'); } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - How can I get correct current date and time for android device while device is offline

I create an android app and in this app, users can save some tasks. Those tasks are saved in device and ... user change device time in purpose. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Initialize empty arraylists in Spring configuration?

I am learning Spring and I read the Spring in Action book. I wonder if you are supposed to inject an empty ... new ArrayList<Car>(); } } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - how to get model attribute value in angularjs from spring controller

I have spring controller defined as @Controller public class TestController { private Logger logger = LoggerFactory ... in angularjs controller? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Gson deserialization - Trying to parse a JSON to an Object

I am trying to parse a JSON into an Object. There are two classes: User and Profile. User got an instance ... this with GSON? Thanks in advance See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Executor suitable for non thread-safe code

I am developing some code that will eventually be multithreaded, using a thread pool Executor. The tasks ... code implemented and debugged. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Application singleton use in Android

I have a facebook initialize sdk call and I need it to initialize the moment application is launched: I want to ... I make its onCreate() work? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Calculate age in Years, Months, Days, Hours, Minutes, and Seconds

I need to take a birthday entered by the user (preferably in dd/mm//yyyy format) and find their age, based on todays date ... pow(2,p)); } } } } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Calling startActivity() from outside of an Activity context requires the FLAG_ACTIVITY_NEW_TASK flag. Is this really what you want?

Am new in android, trying to go to the next Activity through an Adapter, and i am using onBindViewHolder() with ... return itemList.size(); } } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Make multiple threads use and change the same variable

in my program I need to have multiple threads use and edit the same variable, but it doesn't seem to be ... times. Please help me, thanks. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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750 views

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java 8 - Adding AnchorPanes to ScrollPanes Javafx 8

in JavaFX, when I add an AnchorPane that has a Label inside to a ScrollPane, the whole AnchorPane comes in a ... you ran into this issue before? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Generating excel documents programmatically

Has anyone used a Java based library for generating excel documents? Preferably support for 2003? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Javafx button sending arguments to ActionEvent function

I'm learning how to use javafx, along with scenebuilder by creating a very basic calculator but I've come across a ... do that, what can I do? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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