Recent questions tagged java

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java - Calling class methods (static) from inside a velocity view page

Can you call class methods from inside a view page? Specifically ones that are not passed into the view? In ... .Model.SomeClass.DateCreated) %> 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 - Maven: how to copy artifact to specific directory?

The "install" goal copies the artifact to the target directory and to the local repository. How can I tell ... directory of JBoss for example). 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 - What's the purpose of sleep(long millis, int nanos)?

In the JDK, it's implemented as: public static void sleep(long millis, int nanos) throws InterruptedException ... better implementation for it? 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 - BeanFactory not initialized or already closed - call 'refresh' before

here is my error: I am getting this error , can any one help me on this. > SEVERE: Exception sending context ... artifactId>jsch</artifactId> <version>0.1.50</version> </depen...

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

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java - Caused by: org.hibernate.AnnotationException: mappedBy reference an unknown target entity property

I need to make onetomany relationship but this error appears mappedBy reference an unknown target entity property this is ... = optionText; } } 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 - DOMDocument getNodeValue() returns null (contains an output escaped string)

I am processing a DomDocument which is basically the XML result of a SOAP web service. To give you an ... any particular way? Thanks, Parijat 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 - Refresh JList in a JFrame

I've got a JList which displays information from a vector. The user can then add and remove information from this vector ... ? how can I fix it? 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 - component lookup exception with org.apache.maven.repository.RepositorySystem in Maven plugin testing

I'm trying to use maven-plugin-testing-harness version 2.1 with the following test case: public class FooTest ... > </dependency> Any ideas? 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 - Class not found error, but class definitely exists

OK, so I have a project on Android Studio, but when I run the app on the emulator, it crashes. In the stack trace, ... { jcenter() } } r() } 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 partition a list by predicate using java8?

I have a list a which i want to split to few small lists. say all the items that contains with "aaa", all ... it was very old, before java 8. 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 - Properties.store() - suppress timestamp comment

Is it possible to force Properties not to add the date comment in front? I mean something like the first line ... there is a meaningful change. 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 - Unrooted Tests

When running all my tests in Eclipse (Eclipse 3.4 'Ganymede'), one test is listed under "Unrooted Tests". I ... does seem like an Eclipse issue. 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 - Jackson serialization: how to ignore superclass properties

I want to serialize a POJO class which is not under my control, but want to avoid serializing any of the ... do that? 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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197 views

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java - Retrieve multiple messages from SQS

I have multiple messages in SQS. The following code always returns only one, even if there are dozens visible (not ... >1 Thanks for your input See Question&Answers more detail:os...

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

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490 views

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java - How to define optional json field using Jackson

I have an object with one optional field and can not find proper annotation to model it. Any ideas what is the proper way to do it with Jackson? See Question&Answers more detail:os...

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

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186 views

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java - Unwanted double quotes in generated csv file

I have created a CSV file using the Java code below: String csv = rs.getString("UPLOAD_FOLDER_PATH")+".csv"; ... these double quotes are added. 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 wrap text in a JTextArea

I have a JTextArea in Java. When I place a large amount of text in it, the text area provides horizontal ... make my text area wrap instead? See Question&Answers more detail:os...

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

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240 views

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java - PSQLException: ERROR: relation "TABLE_NAME" does not exist

I am trying to run hibernate on a PostgreSQL 8.4.2 DB. Whenever I try to run a simple java code like: ... ) Apologies for the lengthy post. 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 - AbstractMethodError in SessionFactoryImpl when upgrading to Hibernate 5

We're using Spring ORM 4.2.1.RELEASE to interact with Hibernate via JPA. Everything works fine with Hibernate 4.3. ... /map> </property> </bean> 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 streams, how can I map the values in a HashMap?

Given a Map<String, Person> where Person has a String getName() (etc) method on it, how can I turn the ... , String> to the destination map? 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 - Consider defining a bean of type 'service' in your configuration [Spring boot]

I get error when I run the main class. Error: Action: Consider defining a bean of type ' ... repository seconds47.restAPI seconds47.service See Question&Answers more detail:os...

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

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291 views

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java - Why is my embedded h2 program writing to a .mv.db file

I followed the quickstart guide on the h2 database website to create a new database a table and insert some ... for my embedded database? See Question&Answers more detail:os...

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

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173 views

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java - Writing a lambda expression when parameters are ignored in the body

How do I write a lambda expression if it doesn't require arguments and hence its name is excessive? This way doesn' ... ; Is there a better way? 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 convert outputStream to a byte array?

How can I convert an OutputStream to a byte array? I have found that first I need to convert this OutputStream to ... to do. Is there any idea? 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 - android.support.v7.widget.CardView could not be found (Android Studio 1.1 Preview)

I'm trying to add CardView to my activity as the official sample. But it doesn't work. If I run my ... : android.support.v7.widget.CardView . See Question&Answers more detail:os...

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

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266 views

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java - Android NDK r4 san-angeles problem

I'm starting to learn the android NDK and I've instantly come up against a problem. I'e built the tool chain ... . Anyone know how to fix this? See Question&Answers more detail:os...

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

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283 views

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java - org.hibernate.InstantiationException: No default constructor for entity: : principal.Cliente

I'm having this error: Exception in thread "main" org.hibernate.InstantiationException: No default constructor for ... make it look cleaner See Question&Answers more detail:os...

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

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262 views

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java - Cannot convert from android.support.v4.app.Fragment to android.app.Fragment

I'm doing my first Android app, and wanted to get straight into the ICS API. I have so far created an app ... the newest version of the SDK?) See Question&Answers more detail:os...

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

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