Recent questions tagged JAVA

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java - Understanding EJB3/JPA container-level transactions and isolation level

Consider this simplified view of some code with which I'm working: @Stateless(...) @Remote(...) ... /persistence-unit> </persistence> 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 - GWT with JDO problem

I just start playing with GWT I'm having a really hard time to make GWT + JAVA + JDO + Google AppEngine ... best solution to make this working? 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 2: background and Platform.runLater vs Task/Service

I'm pretty confused about the concept of Task/Service in JavaFX. I have used a model based on a background ... good tutorials would also help. 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 read android sim contacts and phone contacts separately

I want to read all sim contacts and phone contacts separately in Android. I searched for this and found ... All phone contacts 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 - Unzipping files programmatically in Android

I am downloading a zip folder and saving in specific folder in my Android device. My application is not accessing ... it, it is not happening. 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 iterate Arraylist<HashMap<String,String>>?

I have an ArrayList object like this: ArrayList<HashMap<String, String>> data = new ArrayList<HashMap<String, ... the data of ArrayList object. 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 cure the cause of Hibernate exception "IllegalArgumentException occurred while calling setter"?

How do I cure the cause of the occasional exception IllegalArgumentException occurred while calling setter that ... remote key invalidation 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 - Is REST controller multithreaded?

I've been doing this tutorial about how to return async callable object. It works as intended. But while the first ... one request at a time. 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 deploy a webapp and create its resources

before deploy "myapp.war" on glassfish 4 i have to create jdbc connection pool (/WEB-INF/glassfish-resources ... > myapp > descriptors" 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 - Check if BigInteger is not a perfect square

I have a BigInteger value, let's say it is 282 and is inside the variable x. I now want to write a while ... must check if b2 is not square. 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 - Problems using Spring Hibernate

I've been using Spring JDBC with great success but I am having alot of trouble with this project. I'll post the ... 't created a.out.xml file. 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 - Why do I not see changes issued through an update query with Spring Data JPA?

I have the following service: @Service public class CamelService { @Transactional public aCamelThing() { Camel camel = ... is not ideal). See Question&Answers more detail:os...

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

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299 views

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java - Relation between JPA and Hibernate annotation

I am quite new in Spring world and I am studying how to integrate Hibernate and Spring framework i have some ... giving me Hibernate? Tnx Andrea 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 - Selenium get natural height and width of an element. should not rely on style attribute. GetSize(), GetLocation() and getRect() fails to do so

Here is the scenario. When am using GetSize(), GetLocation() Functions against the image ID 'FlashID1x' its always ... : "+pointer.getWidth()); 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 - Interpreting bytecode vs compiling bytecode?

I have come across a few references regarding the JVM/JIT activity where there appears to be a distinction ... and "interpreting" bytecode? See Question&Answers more detail:os...

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

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364 views

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java - How to use EMF to read XML file?

EMF = Eclipse Modeling Framework I have to use EMF in one of my class projects. I am trying to understand how ... the data from the XML file. See Question&Answers more detail:os...

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

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213 views

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java - Stopping inheritance without using final

Is there any other method of stopping inheritance of a class apart from declaring it as final or by declaring its constructor as private? 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 - Scene loads too slow

I am building a JavaFX application and I am wondering if there is a recommendation (best practice) on how to load ... that my code is a messy See Question&Answers more detail:os...

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

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259 views

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java - Unmarshalling generic list with JAXB

I've a service that returns this XML: <?xml version="1.0" encoding="UTF-8"?> <response> <status>success ... types other than Project and User. 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 input Date to a Struts2 action from a jsp?

I am facing a lot of problems here in my jsp page. What tag I should use to get a date (yyyy-MM-dd) ... enter a date in the right format. 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 - Self bounded generics

Is there is any actual difference between these this generic public class SelfBounded <T extends SelfBounded<T>>{} ... how can I observe them? See Question&Answers more detail:os...

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

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242 views

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java - Explicit nulling

In what situations in java is explicit nulling useful. Does it in any way assist the garbage collector by making ... to be a good practice? See Question&Answers more detail:os...

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

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358 views

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java - Custom Spring Boot starter: how do you contribute i18n messages to the MessageSource?

I'm writing a custom Spring Boot starter that other developers will drop into their applications, and this starter ... for the app developer? See Question&Answers more detail:os...

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

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676 views

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java - Spring-Boot one @Scheduled task using multiple cron expressions from yaml file

I like to have an implementation of one @Scheduled job using different configuration properties of .ymlfile. Means in ... to make this dynamic? 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 - Apache POI Word tutorial.

Does someone know good tutorials about working with MS Word using Apache POI library? I want to understand how ... table with some values. See Question&Answers more detail:os...

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

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215 views

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java - JDBC batch operations understanding

I use Hibernate ORM and PostgreSQL in my application, and sometimes i use batch operations. And at first I ... BatchedQuery i couldn't find See Question&Answers more detail:os...

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

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376 views

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java - Error shown when creating new Maven project in Eclipse

When I am trying to create new project on Maven in eclipse IDE ,It shows the following errors: "Could not ... >SpringMaven</name> </project> See Question&Answers more detail:os...

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

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347 views

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java - How to read JSON file from resources in Spring Boot

Using Spring Boot 2.1.5 Release, have created the following sample Spring Boot Microservice: Maven Project ... possibly being doing wrong? See Question&Answers more detail:os...

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

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