Recent questions tagged java

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java - Is there an elegant way to process a stream in chunks?

My exact scenario is inserting data to database in batches, so I want to accumulate DOM objects then every ... only processing the stream once? 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 format a String number to have commas in android Edit Field

For what function I can use in android to display the number into different formats. For eg: If I enter 1000 then ... ,000,000. Please guide 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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java - Is it possible to make log4j display which file it used to configure itself?

Question Is it possible to make Log4J display the full path of the file it used for configuration? Background ... or by inspecting variables)? 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 - ActivityCompat.requestPermissions not showing dialog box

if (ContextCompat.checkSelfPermission(RegisterActivity.this, Manifest.permission.READ_PHONE_STATE) == PackageManager. ... manifest> 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 correct target for the JAVA_HOME environment variable for a Linux OpenJDK Debian-based distribution?

In Windows, JAVA_HOME must point to the JDK installation folder (so that JAVA_HOME/bin contains all executables and ... for your help, Luis 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 - WELD-000072 Managed bean declaring a passivating scope must be passivation capable

I wrote a simple program in java web forms but i am receiving the following error: WELD-000072 Managed bean declaring ... this.name = 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 - Why does Apache Commons consider '???' numeric?

According to Apache Commons Lang's documentation for StringUtils.isNumeric(), the String '???' is numeric. ... do those characters represent? 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't find @Nullable inside javax.annotation.*

I want use @Nullable annotation to eliminate NullPointerExceptions. I found some tutorials on the net, I noticed ... : cannot find symbol 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 - Jackson how to transform JsonNode to ArrayNode without casting?

I am changing my JSON library from org.json to Jackson and I want to migrate the following code: JSONObject datasets ... it isn't an array? 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 - Logic to strategically place items in a container with minimum overlapping connections

This is more of a algorithmic question. I have a page which using javaScript displays items and items ... articles slightly daunting :(. 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 popBackStack() and replace() operations differ?

I've encountered some curious behavior in my application when managing Fragments and I was wondering if SO could ... with Fragment B again. 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 do these symbolic strings mean: %02d %01d?

I'm looking at a code line similar to: sprintf(buffer,"%02d:%02d:%02d",hour,minute,second); I think the symbolic ... some light on this for 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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java - ContentProvider insert() always runs on UI thread?

I have an app that needs to pull data from a server and insert it into an SQLite database in response to user input ... way to get them not to? 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 use SpringMvc and webflux together?

I would like to use 2 approaches(reactive and standard) in one project. I tried to migrate one REST API ... all project to reactive approach? 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 get the average colour of an image

I want to be able to take an image and find out what is the average colour. meaning if the image is half black ... How can I do this in android. See Question&Answers more detail:os...

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

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138 views

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java - CoordinatorLayout with RecyclerView & CollapsingToolbarLayout

I've been attempting to implement a CollapsingToolbar with a RecyclerView using the small amount of guidance here: http: ... have I done 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 - Efficient way to search a stream for a string

Let's suppose that have a stream of text (or Reader in Java) that I'd like to check for a particular ... the more efficient of those algorithms. See Question&Answers more detail:os...

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

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542 views

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java - Why does Jackson 2 not recognize the first capital letter if the leading camel case word is only a single letter long?

I'm using Spring 4 MVC with Jackson 2 for my service. For one of the operations I have a request object ... issue with the mismatch in case. 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 indent the fluent interface pattern "correctly" with eclipse?

I just created a generator for some fluent interfaces. Now I have lots of code looking like this: new ... in my first code example? 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 override application.properties during production in Spring-Boot?

I'm using spring boot and application.properties to select a database during development by @Configuration @Profile(" ... is NOT about tomcat. 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 functionality of setSoTimeout and how it works?

I'm trying to learn Socket by myself. I'm little bit confused by following text from Oracle website. I have ... the socket does't read anymore? 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 - WeakReference/AsyncTask pattern in android

I have a question regarding this simple frequently occurring situation in android . We have a main activity , we ... length of the 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 - Can I run two tomcat instances on the same machine?

Can I run two Tomcat servers with two different ports on the same machine? Will it create any problem? When I ... exe file in the task manager. 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 are hs_err_pid.log files generated when Tomcat crashes?

Are any specific settings required on the Java tab of Tomcat configuration tool in order to generate a hs_err_pid ... this location be changed? 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 - Design pattern for "retrying" logic that failed?

I'm writing some reconnect logic to periodically attempt to establish a connection to a remote endpoint which went ... dealing with this issue? 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 ModelAndView vs Model in Spring?

This might sound dumb to the Spring experts, but I have to ask: How do you decide on when to use ModelAndView ... , and what are the benefits? See Question&Answers more detail:os...

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

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141 views

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java - Maven update dependencies in POM

Are there any preexisting Maven plugins or commands to update the dependencies in the POM? Example: (if this was ... .4</version> </dependency> 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 - Understanding the Spring Data JPA @NoRepositoryBean interface

I encountered the @NoRepositoryBean interface several times whilst reading the Spring Data documentation. To quote ... concrete usage example? See Question&Answers more detail:os...

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

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