Recent questions tagged java

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java - Is writing a reference atomic on 64bit VMs

The java memory model mandates that writing a int is atomic: That is, if you write a value to it ( ... references to 32bit? Regards, Steffen See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Spring Boot - Validations stopped working after upgrade from 2.2.5 to 2.3.0

I've migrated a Spring Boot project from 2.2.5 to 2.3.0 and after that, Validations stopped to work ( ... BELOW! Thanks everybody for the help! See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Session/cookie management in Apache JMeter

We have a simple performance test flow in an application. We login Search based on some criteria repeat searches ... will be much appreciated. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - SimpleDateFormat returns 24-hour date: how to get 12-hour date?

I want current time in millis and then to store it in 12 hour format but with this piece of code I ... modifications to get the desired results? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Springs XmlBeanFactory is deprecated

I try to learn Spring. I am following this site http://www.roseindia.net/spring/spring3/spring-3-hello-world.shtml ... ; myBean.sayHello(); } } See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Force a class to override the .equals method

I have a bunch of class who implement a common interface : Command. And this bunch of class goes to a ... forcing the override of hashcode... See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Changing variables in realtime when debugging in eclipse?

Using Eclipse, when debugging is it possible to change the value of variables during runtime of a project for testing ... to get my idea across. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Suppress all Logback output to console?

How can I configure Logback to suppress all of its output to the console (standard output)? In particular, I wish ... runs in WebLogic 10.3.2. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Is chain of StringBuilder.append more efficient than string concatenation?

According to Netbeans hint named Use chain of .append methods instead of string concatenation Looks for string concatenation ... ).append("/"); See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - What is difference between setMaxResults and setFetchSize in org.hibernate.Query?

What is difference between setMaxResults and setFetchSize in org.hibernate.Query? I just can no get it =) See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Since the Android getFragmentManager() API is deprecated, is there any alternative?

FragmentManager is deprecated. Is there an alternative or what can I do now? PlaceAutocompleteFragment autocompleteFragment = ( ... error. } }); See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Why doesn't the post increment operator work on a method that returns an int?

public void increment(){ int zero = 0; int oneA = zero++; // Compiles int oneB = 0++; // Doesn't ... ;? Invalid argument to operation ++/-- See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Is it possible that TreeSet equals HashSet but not HashSet equals TreeSet

I had a interview today and the person taking my interview puzzled me with his statement asking if it possible that ... How is it even possible? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - VisualVM and Self Time

I've been searching all over for a consistent and clear explanation of what 'self time' actually refers to ... /input will be appreciated. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - No log4j2 configuration file found. Using default configuration: logging only errors to the console

$ java -Dlog4j.configuration=file:///path/to/your/log4j2.xml -jar /path/to/your/jar_file.jar Written to ... /faq.html#noconfig for more info. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - How to specify jdk path in eclipse.ini on windows 8 when path contains space

This doesn't work -vm %JAVA_HOME%/bin/javaw.exe How can I replace %JAVA_HOME% with full path on Windows 8 ... space ("Program Files" directory) See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - How can I find out if code is running inside a JUnit test or not?

In my code I need to do certain fixes only when it is run inside a JUnit test. How can I find out if code ... like JUnit.isRunning() == true ? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Why not abstract fields?

Why can't Java classes have abstract fields like they can have abstract methods? For example: I have two ... been designed to allow this? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Can you organize imports for an entire project in eclipse with a keystroke?

Wouldn't it be nice to just do a keystroke and have eclipse organize all imports in all java classes instead of ... Is there a keystroke for it? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - How can I send message to specific contact through WhatsApp from my android app?

I am developing an android app and I need to send a message to specific contact from WhatsApp. I tried this ... though the contact is selected. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - how do i set an alarm manager to fire every on specific day of week and time in android?

for example i want to have an alarm that will fire every sunday at noon.... how would i do this? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Calling native libraries in Flutter using Platform Channels

Using platform channels, Flutter can interop with the native platform (i.e. reading battery level). On Android, this ... how can I do that? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Spring Security Authentication using RestTemplate

I have 2 spring web apps that provide 2 separate set of services. Web App 1 has Spring Security implemented using a ... Web App 2 to Web App 1 See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - How to modify request body before reaching controller in spring boot

I have a spring boot application. I change the request body of every post request. Is it possible to modify ... . Please include an example. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - How to get server response with netty client

I want to write a netty based client. It should have method public String send(String msg); which should return ... use Netty 4.0.18.Final See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - How to send binary data with socket.io?

so I have been having real trouble sending binary data with socket.io in node.js (Js client and Android client) ... ); My answer is bellow. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Webapp file organization convention (development structure)

For the webapps I'm developing, I usually use the following files organization, since I think it ... from personal/professional experiences. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Prevent Dozer from triggering Hibernate lazy loading

I am using Spring transactions so the transaction is still active when POJO to DTO conversion occurs. I would ... doesn't prevent lazy loading. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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