Recent questions tagged JAVA

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java - Separating jhipster back-end and front-end into two projects?

I'm trying jhipster with token-based authentication. It works perfectly. Now, I want to run back-end and front- ... something wrong. What is 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 - Get RequestBody and ResponseBody at HandlerInterceptor

Logic I have to implement is logging all requests with body served to DB. So I decided to use: ... I reuse them at HandlerInterceptor? 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 Criterion IN Clause 1000 break up

Hi i have this large oracle hibernate web applications and it seems to give this error ORA-01795: maximum ... have such tested component? 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 - Obfuscate private fields using ProGuard

I'm using ProGuard in AndroidStudio 1.2.1.1 with Gradle 1.2.3. My Gradle's release build is ... do the opposite of -keepclassmembernames? 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 the exact difference between out.write() and out.print()

In my servlet I gave both out.print and out.write. but both prints in the browser. What is the exact difference ... out.print and out.write ? 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 connect to a database that requires password without exposing the password?

I am creating an application and I need to connect to a database. The database requires login/password so ... and data modification in tables. 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 debug Segfaults occurring in the JVM when it runs my code?

My Java application has started to crash regularly with a SIGSEGV and a dump of stack data and a load of information ... end of a GC operation. 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 - Format of TYPE_INT_RGB and TYPE_INT_ARGB

Could anyone explain for me how java stores color in TYPE_INT_RGB and TYPE_INT_ARGB ? Do these lines of code ... and blue from TYPE_INT_ARGB? 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 - Run Jar in Console

I am writing a java applicaiton that outputs strings via System.out and I just want to know how to run this ... see this output in a console? 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 - Lambda can only be used with functional interface?

I did this: public class LambdaConflict { public static void main(String args[]){ //* System.out.println( ... lambda to replace anonymous class? See Question&Answers more detail:os...

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

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342 views

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java - Send notification to all the devices connected to a Wi-Fi network

Is there any way to send a notification to the devices which are connected to a particular Wi-Fi network? ... notification.) Is this 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 - Why Arrays.sort is quicksort algorithm, why not another sort algorithm?

Why? Is it faster or more efficient? For systems with one core, we can use quicksort. What should we use on ... , four cores, or eight cores? 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 use xPath in Selenium WebDriver to grab SVG elements?

I am testing an API, based on OpenLayers, with Selenium WebDriver (Java version). I want to test a functionality ... ' and @fill='#990000']"; 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 - Loading a native library in an Android JUnit test

I've generated a native library using ndk-build which I'm able to load and use with in my Android application. ... ...but as an absolute path. See Question&Answers more detail:os...

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

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223 views

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java - Systematic approach with Maven to deal with dependency hell

I'm struggling with how to approach jar dependency hell. I have a Maven-IntelliJ Scala project that uses some ... any resources that they use? See Question&Answers more detail:os...

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

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255 views

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java - How can I get an Android TableLayout to fill the screen?

I'm battling with Android's awful layout system. I'm trying to get a table to fill the screen (simple right? ... no help. Anyone have 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 - Implement 'logout' functionality in Spring Boot

To get a basic security feature working, I added the following starter package to my pom.xml <dependency> < ... a Spring Boot based application? 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 logging with Lombok

I would like to use Project Lombok's log annotation in my Spring Boot projects but I don't want to lose the ... are 7 Lombok choices! 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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695 views

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java - maven jacoco: not generating code coverage report

I am trying to setup jacoco for my project's code coverage My project is based on Java 1.8 Here is how ... How can I generate report? 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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330 views

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java - How do you keep the machine awake?

I have a piece of server-ish software written in Java to run on Windows and OS X. (It is not running on a ... the OS to stay awake. 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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495 views

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java - Jackson Json: how to convert array to JsonNode and ObjectNode?

Given Employee and company class Company { String companyName; } Employee { String employeeName; } and my code like the ... , @hsluo to help me. See Question&Answers more detail:os...

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

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196 views

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java - Android, How to use readTypedList method correctly in a Parcelable class?

I have two Activities, in the first one, I instanciate an ArrayList of Object myObject. In the second activity, ... be great, 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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java - How can I add a space in between two buttons in a boxLayout?

I have four buttons in a BoxLayout group. This is just a sample of two because it's all repeated code ... float.add(Box.createHorizontalGlue()); See Question&Answers more detail:os...

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

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181 views

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java - Spring Singleton Thread Safety

If I have a Java class defined below that is injected in my web application via dependency injection: public AccountDao { ... : a.isActive(); } 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 use Flyway configuration to handle multiple databases

we have a java application configured with maven that uses multiple databases. It is one app - many schemas. I' ... it worked well. Thanks Jk1 See Question&Answers more detail:os...

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

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329 views

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java - Is {Filter}ing faster than {Query}ing in Lucene?

While reading "Lucene in Action 2nd edition" I came across the description of Filter classes which are could be ... performance point of view? See Question&Answers more detail:os...

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

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260 views

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java - wait until wifi connected on android

I have a small program that trying to connect to a wifi network. It enables the wifi on the device then if ... ? are there any other ways? See Question&Answers more detail:os...

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

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428 views

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java - org.hibernate.StaleStateException: Batch update returned unexpected row count from update [0]; actual row count: 0; expected

I am getting this error when I am trying to update values in my database from my spring mvc application : ... ! TRACE: org.hibernate.impl.SessionImpl - after transaction completio...

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

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