Recent questions tagged Java

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I am having troubles invoking a method asynchronously in Spring, when the invoker is an embedded library receiving ... am I missing here? 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 - Synchronized vs ReentrantLock on performance

I have been through a set of few surprises when it comes to Queue implementation for a Multithreading system. ... vendor Sun Microsystems Inc. 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 - Detecting socket disconnection?

I am kinda upset that this cannot be handled in an elegant way, after trying different solutions (this, this ... there something I did 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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java - How to do a bulk update in Firestore

I'm using Cloud Firestore and have a collection of documents. For each document in the collection I would like ... . See here: Batched Writes 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 - JAXB unmarshalling without XmlRootElement annotation?

Is there any way we can un-marshall for a class without @XmlRootElement annotation? Or are we obligated to enter ... } leaving out the details. 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 - Iterate through nested hashmap

How would I go about iterating through a nested HashMap? The HashMap is setup like this: HashMap<String, HashMap< ... the name of the student? 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 - Storing a new object as the value of a hashmap?

I am trying to find a way to store a new instance of a class as the value in a Java hashmap. The idea ... way? Any help is 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 - Hibernate's Transformers.aliasToBean() method

Query query = getHibernateTemplate().getSessionFactory().getCurrentSession().createSQLQuery( "select proj_employee.employee_no ... letters? 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 there a way to create the bean class from a json response

Converting JSON to Java The above question is with reference to what has been described on the above thread. There ... to a JSON response. ** 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 set dependency mediation strategy to newest rather than nearest

Can I configure Maven to choose the "newest" dependency on a conflict, rather than the "nearest"? The " ... docs on "Dependency mediation") 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 does it mean when I say Prepared statement is pre-compiled?

I am using MySQL in Java. I don't have a good understanding of PreparedStatement. I know it is better to use ... What do we mean by compiled? 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 - The temporary upload location is not valid

I'm developing a web app with Java and Spring MVC (and hibernate to link to a MySQL database). I tried ... ; } * holds base package name 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 - Monitoring Apache Spark with Prometheus

I have read that Spark does not have Prometheus as one of the pre-packaged sinks. So I found this post on ... could not found some useful doc. 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 - Issues with using Gson to pretty-print JSON String

Could someone please suggest why this is happening... I've got some code to pretty print some JSON. To do this, ... How could I fix the above? 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 - The type org.springframework.context.ConfigurableApplicationContext cannot be resolved. It is indirectly referenced from required .class files

I am following the tutorial at spring.io to build a spring app using spring boot. I can get the program ... be greatly appreciated. Thank you. 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: How to determine Network speed in android programmatically

How to show a slow internet connection to the user when the network is connected Note: Not a network type (2G,3G,4G, WIFI) 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 Camel http to http routing (Is it possible?)

I am starting now with Camel. I have seen the http4 component for http clients and the ... .NullPointerException java.lang.NullPointerException 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 - Does HQL update clear 2nd level cache?

Native queries are clearing the 2nd level cache entries. An answer from the hibernate forum that is 7 years old says ... .save(..) is invoked. 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 - Jaxb: Unmarshalling xml with multiple namespaces in same package

I'm new to using namespaces in xml so I am kind of confused and would like some clarification. I have a ... me in the right direction? 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 - Conversion IPv6 to long and long to IPv6

How should I perform conversion from IPv6 to long and vice versa? So far I have: public static long IPToLong(String ... for both ipv4 and ipv6) 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 - Serializing List of Interfaces GSON

I came across some weird behavior in GSON. If I have the following class structure: public interface Animal { ... is giving me issues. 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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273 views

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java - Changing content type in jax-rs REST service

Forgive me, but I may not be familiar with all the lingo necessary to ask this question properly. I'm ... codes from inside this method? 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 - Bundle native dependencies in runnable .jar with Maven

I have a project managed in Maven that has some native dependencies (LWJGL). Everything works fine in ... successfully when double-clicked? See Question&Answers more detail:os...

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

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633 views

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java - How to exclude classes from the coverage calculation in EclEmma without actually excluding them from the coverage itself

I am using EclEmma to test the coverage of my scenario tests and use case tests on my project. I have ... package because of privacy reasons. 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 - Spring boot application and MessageSource

I have been trying to create a demo spring boot app with MessageSource, but i couldn't ... ago: Spring Boot MessageSourceAutoConfiguration 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 - NumberFormatException on valid number String

I have seen some other questions about this but the errors were related to a leading 0 in the string. This ... ) // Throws me the error 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 - Handling several implementations of one Spring bean/interface

Say I need to rely on several implementations of a Spring bean. I have one AccountService interface ... private AccountService accountService; 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 - jsse handshake_failure on public https web site

I have read a related question already, but it doesn't seem to fail at the same place I am seeing a ... the way java interacts with the server. See Question&Answers more detail:...

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

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