Recent questions tagged Java

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java - Android: error including/repacking dependencies which reference javax core classes

I'm working on an Android app using Maven as the build tool. I managed to set evertyhing up correctly (maven ... Many, 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 do I configure autoformatting in Eclipse?

I dislike how auto format messes up empty cycle body, like: Before for (int i = 0; isTest(i); i++); ... to configure eclipse not to do this? 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 - Crashlytics not finding API Key in crashlytics.properties at runtime

I'm currently implementing the API Key switching script suggested here, except with build types instead of ... towards crashlytics.properties? 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.view.ContextThemeWrapper cannot be cast to android.app.Activity

I'm not a designer but when i got this project i can`t open specifically some screens, i think that ... reflect.Method.invoke(Native Method) at 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 - SpringBoot 1.3.0 support hibernate 5?

I'm a little confused about SpringBoot's (1.3.0) support of Hibernate5. The reference lists a dependency on ... someone please clarify 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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546 views

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java - How to set max-http-header-size in spring boot 2.x application

I have Spring boot app running Java 11: <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring- ... max-http-header-size? 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 - Using Jackson to map object from specific node in JSON tree

Is it possible to have Jackson's ObjectMapper unmarshall only from a specific node (and 'down') in a JSON tree? ... as the root of the tree. 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 - Injection of HttpServletRequest

I am using ejb 3 and trying to @Inject HttpServletRequest, but while deploying I occur exception. Code: @Inject ... could I do with 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 - How can I sort a List several different ways in a JSP?

I have a list of Player objects getting passed into a JSP from a controller, and I want to display them in ... in to the different forEach tags? 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 zip files in Amazon s3 Bucket and get its URL

I have a bunch of files inside Amazon s3 bucket, I want to zip those file and download get the contents via S3 URL using Java Spring. See Question&Answers more detail:os...

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

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622 views

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java - How to show error message in liferay portal?

How to show error message in liferay portal? I read on liferay.com site that for show error message I can use ... not working, how to use 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 align String on console output

I've to write code for: I'd written the code: public class tables { public static void main(String[] args) ... problem. Can anybody help me out? 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 - Accessing scheduled tasks in Spring

I have a couple of tasks scheduled within Spring's task scheduler: <task:scheduled-tasks> <task:scheduled ref=" ... how to continue from here? See Question&Answers more detail:os...

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

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234 views

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java - Why do we need bounded wilcard <? extends T> in Collections.max() method

I've read awesome "Effective Java" by Joshua Bloch. But one example in the books is left unclear to me. ... of T extends Object constraint. See Question&Answers more detail:os...

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

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380 views

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java - Thread behaving strangely in JUnit

I'm trying to write a unit test that requires mulitple threads. However, it seems that the threads just stop part ... here? Thanks, - Andrew. See Question&Answers more detail:os...

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

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359 views

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java - How to Tell JPA the prefered DataType

If I use JPA (EclipseLink) to create tables a String type results in a varchar2(255). How could I tell JPA (via ... I have to do it by hand? See Question&Answers more detail:os...

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

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296 views

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java - Adding fonts to Swing application and include in package

I need to use custom fonts (ttf) in my Java Swing application. How do I add them to my package ... install fonts before using my 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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507 views

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java - What are the units for battery temperature and voltage when Intent.BATTERY_ACTION_CHANGED on android device?

I retrieved battery temperature and voltage information using the intent Intent.ACTION_BATTERY_CHANGED and the values I got ... or micro volt? See Question&Answers more detail:os...

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

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357 views

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java - Iterating over a map entryset

I need to iterate over the entry set of a map from which I do not know its parameterized types. When iterating over ... entrySet()) { ... } } See Question&Answers more detail:os...

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

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343 views

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java - Converting Consumers to Functions

Many lambdas for the Function interface take the form t -> { // do something to t return t; } I do ... missed that makes my method redundant? See Question&Answers more detail:os...

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

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282 views

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java - Secure / Encrypt log4j files

I have a problem ; security requirement i have java swing app that have logging files generated with log4j ... the code in Cipher OutputStream See Question&Answers more detail:os...

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

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363 views

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java - How to extract separate text nodes with Jsoup?

I have an element like this : <td> TextA <br/> TextB </td> How can I extract TextA and TextB separately? See Question&Answers more detail:os...

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

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498 views

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java - Find The Closest Answer in HashMap

I want to search for a key in a hashmap and find the nearest one to that key! HashMap<Long, Object> map = ... can I do that!? Thanx 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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291 views

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java - Why does lambda translation need generation of a static method?

Lambda translation is a two step process, One: desugaring the lambda into a static method in same class. public class ... body here */ } } See Question&Answers more detail:os...

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

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543 views

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java - JFileChooser to open multiple txt files

How can I use JFileChooser to open two text files and after I selected these files, I want to compare them, ... screen etc. 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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413 views

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java - @Autowired HttpServletResponse

I'm looking for a way to autowire HttpServletResponse. It doesn't work with spring out of the box, ... (and excluded HttpServletResponse)? See Question&Answers more detail:os...

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

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1.0k views

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java - It seems that your device does not support camera(or it is locked)

Android opencv samples and tutorials were running fine and suddenly one day I get this for all of those: "It ... but the problem still persists. See Question&Answers more detail:os...

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

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686 views

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java - Reload log4j2 configuration on demand

I have my log4j2.xml config file set to be checked every 30 seconds: <Configuration status="WARN" ... the monitorInterval expired. 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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