Recent questions tagged Java

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java - JPA's cascade = REMOVE and Hibernate's @OnDelete used together?

I have inherited a code base on which nearly all relations have the following annotations: @OneToMany(fetch = ... DB based cascade anyway? 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 difference between .class and .dex files?

Of course, .dex files are for the Dalvik VM of Android and .class files are for the JVM. But I wonder if ... to the ones from the JVM? 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 - Protocol buffer objects generated at runtime

a colleague of mine came with an idea of generating protocol buffers classes at runtime. Meaning: There is C++ ... for such use case. 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 - Mutual Authentication with x509 Certificates using HttpClient 4.0.1

Does anyone have any friendly tips on how to perform client authentication via an x509 certificate using HTTPClient 4.0.1? 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 - Efficient hashCode() implementation

I often auto-generate an class's hashCode() method using IntelliJ IDEA and typically the method takes the ... approach this problem differently? 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 - Adding an SSL Certificate to JRE in order to access HTTPS sites

Context: So I'm trying to access an HTTPS site from my Java code but I am not able due to an SSL ... would be much 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 - Programmatically importing an existing project into Eclipse

I am trying to importing the project to eclipse through programmatically. I dont want to use UI mode. Below is ... the source folder and etc. 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 set event-loop pool size in Spring Webflux / WebClient?

In multi-reactor framework such as Vert.X we can set the number of event-loop threads, e.g.: final ... Spring Boot 2 WebFlux / WebClient? 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 - XML parse file from HTTP

I have an XML file located at a location such as http://example.com/test.xml I'm trying to parse the XML file ... How can I get the XML file? 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 configure JSF url mappings without file extensions?

Most tutorials propose a default JSF configuration similar to the following web.xml: <context-param> <param- ... the server side implementation. 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 - Customize Jackson ObjectMapper to Read custom Annotation and mask fields annotated

I have a requirement where I have created a Custom Annotation @MaskSensitiveData. I annotate sensitive fields. like ... suggest 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 - Apache CXF - None of the policy alternatives can be satisfied

I'm trying to create client of 3rd party WS. My app is running on JBoss AS 6 (with its Apache CXF 2.3.1 stack ... to auth (I can't get conduit) 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 - Hbase client can't connect to remote Hbase server

i have written a following hbase client class for remote server: System.out.println("Hbase Demo Application "); // ... and how to solve 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 - How to get Firefox working with Selenium WebDriver on Mac OSX

I am trying to config proxy settings for the WebDriver so I have used the following code .... FirefoxProfile ... give path to firefoxprofile() 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 - Stateless session bean with instance variables

I have a stateless session bean that contains one public method, several private methods, and some instance ... was causing some confusion. 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 best way to compare several javabean properties?

I need to compare dozens of fields in two objects (instances of the same class), and do some logging and ... class which must not be compared. 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 - Checkbox values do not bind into object when false?

I used ModelAttribute to bind object in Spring web application. Once I notice that, in case an object has an boolean ... /> </fieldset> </form> 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 - Remove "empty" character from String

I'm using a framwork which returns malformed Strings with "empty" characters from time to time. "foobar" for ... and sanatize it. 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 - MVP: Should the View implement a Presenter's interface or vice versa?

I am doing my first steps with GWT. I have a question after reading: Large scale application development and MVP ... ? Which should I choose? 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 - 100 threads TIMED_WAITING in tomcat, causing it to stall as total number of threads crosses 200

Recently one of our production tomcat server became unresponsive because tomcat's busy threads ... is? 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: Where to put activity's onCreate() code in a fragment?

I'm converting all my Activities to Fragments so that I can use them in a ViewPager. I've searched for this ... why? Many 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 to make updating BigDecimal within ConcurrentHashMap thread safe

I am making an application that takes a bunch of journal entries and calculate sum. Is below way of doing it is ... pro and con of the two? 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 - Concurrent Mark and Sweep algorithm details

I am struggling to understand and get more details on the steps involved in CMS tenured collection cycles. Initial ... is delegated to full GC. 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 - Packaging a jar into a dist dir with separated external resources and dependencies

Here's what I'm trying to achieve - a dist directory (or a zip file) that looks like this: dist/ | ... the assembly plugin be a better solution? 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 - Non-public top-level class vs static nested class

It seems to me that non-public top-level classes and static nested classes essentially perform the same tasks when ... in the same source file. 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 determine build architecture (32bit / 64bit) with ant?

We have inherited an ant build file but now need to deploy to both 32bit and 64bit systems. The non-Java bits ... way to mimic this with ant? 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 - Waiting Threads Resource Consumption

My Problem: Does large numbers of threads in JVM consume a lot of resources (memory, CPU), when the threads are ... CPU in a very large 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 - Formatting a long timestamp into a Date with JSTL

I am pulling a long timestamp from a database, but want to present it as a Date using Tags only, no embedded ... 't work. Any advice? 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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