Recent questions tagged java

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java - Play! framework uses a <lot> of statics

Waaah, the Play! framework has so many static methods. Where I go to school, we were told never ever to use ... should be avoided at all costs.) 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 new in Hibernate 4?

I just saw that a beta of Hibernate 4 was released. What's new in 4 compared to 3(.6)? I couldn't ... when Googling the title of this question. 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 - Default session timeout for Apache Tomcat applications

What is the default session timeout for web applications deployed on Tomcat5.5? Is it browser specific? In my web ... web.xml nor in code. 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 - Setting log level of message at runtime in slf4j

When using log4j, the Logger.log(Priority p, Object message) method is available and can be used to log a ... no way to implement 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 - What is inverse function to XOR?

There is XOR function in Java - a^b For exemple: 5^3 = 6 Can you tell me inverse function? If I ... range of numbers which include number 5? 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 - AWS Error Message: A conflicting conditional operation is currently in progress against this resource

I'm getting this error intermittently. I have a program that uses the java aws sdk and loads over ... .createBucket(AmazonS3Client.java:503) 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 memory leak?

I think my android app is leaking memory. I'm not absolutely sure that this is the problem though. Every so ... -2.apk:/resources.arsc: 17K 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 - Should HttpURLConnection with CookieManager automatically handle session cookies?

I have a Java application (JDK 1.7.0_13) and am using java.net.HttpURLConnection to connect to some ... and resending them with requests? 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 - Question about Hibernate session.flush()

I want to inquire about what actually the flush method does in the following case: for (int i = 0; i < ... happen when the condition is 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 - When to use volatile and synchronized

I know there are many questions about this, but I still don't quite understand. I know what both of these ... } Any help is greatly appreciated. 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 print from the Thermal Printer in Android?

I am working on an application for an Android device that will have a built in line printer. I have to ... printed. Any help is appreciated. 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 startup performance issues

I'm trying to integrate Spring in a pretty large application with thousands of classes, and i'm experiencing ... time : Spring Context Indexer 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 - Kryo serialization library: is it used in production?

Kryo is a very new and interesting Java serialization library, and one of the fastest in the thrift- ... serialization is pretty competitive. 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 - Docker cache gradle dependencies

I'm trying to deploy our java web application to aws elastic beanstalk using docker, the idea is to be able to run ... /bin/catalina.sh", "run"] 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 database without XML configuration, but using @Configuration

I would like to know how to initialize a database without having to create an XML file. I already use this kind ... for that. Is it possible? 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 - JPA: Query that returns multiple entities

I'm writing a JPQL query that joins across three tables. In my resultlist I would like to get all three entities ... 3.x is my JPA provider. 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 @Async method in controller is executing synchronously

My [basic] Spring Boot application accepts a request from the browser, sent via jQuery.get() and is supposed to ... in the code snippet 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 - Intellij IDEA: specify datasource for JPA validation

I have a Spring project for a small web app set up in Intellij IDEA. It uses JPA on top of Hibernate for ... table names for my JPA entities? 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 - Can we use static method in an abstract class?

In Java Programming, Can we call a static method of an abstract class? Yes I know we can't use static with a method ... I want to know 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 - What's the intended use of IllegalStateException?

This came up in a discussion with a colleague today. The Javadocs for Java's IllegalStateException state that it: ... phrased like that? ;) 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 - Can I delay a stubbed method response with Mockito?

I'm writing unit tests now. I need to simulate long-run method with Mockito to test my implementation's timeout ... .thenReturn(c).after(5000L); 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 - Intellij (Android studio) member variable prefix

How do I configure Android Studio (or Intellij generally) to correctly generate getters and setters for member ... , present and future. 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 make Runnable's run() throw an exception?

A method I am calling in run() in a class that implements Runnable) is designed to be throwing an exception. ... I work around this limitation? 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 - Log4j2 configuration - No log4j2 configuration file found

Lately I decided to learn how to use the log4j2 logger. I downloaded required jar files, created library, xml ... in project folder in eclipse. 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 order are the Junit @Before/@After called?

I have an Integration Test Suite. I have a IntegrationTestBase class for all my tests to extend. This base class has ... always called 4th?* } } 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 use credit card numbers containing spaces?

Some fancy websites show an error dialog when it is detected that an untrained shopper has entered a credit/debit ... as if they were correct? 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 - Elegant ways to handle database views on hibernate entities?

One of the main reasons I use Hibernate is that it provides the flexibility to switch to another database without having to ... so far... :-/ 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 - Retrying the request using Retrofit 2

How can I add retry functionality to the requests sent by Retrofit 2 library. Something like: service.listItems().enqueue( ... 5 /* times */); See Question&Answers more detail:os...

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

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