Recent questions tagged Java

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java - Retrieve active locale in Grails application

I know I can use the "lang" parameter to automatically change the current locale as described in the docs, but ... changes done via "?lang=xx" 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 - Two Dimensional ArrayList

I know that I can add a dimension to an array by adding another [] beside it. But can I have more ... ArrayList? How might I accomplish 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 - json date format in spring-boot

I am using spring-boot and I have an entity class defined something like this import org.joda.time.LocalDateTime; ... to proper json format ? 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 - Fragment declared target fragment that does not belong to this FragmentManager

I have made an activity A which has a fragment X in it. In fragment X, EditText item has on click ... does not belong to this FragmentManager! 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 - Sending and Parsing Response using HTTP Client for a JSON List

With in my java code, I need to send a http post request to a specific URL with 3 headers: URL: ... import) will be most appreciated. 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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310 views

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java - Draw a JButton to look like a JLabel (or at least without the button edge?)

I've got a JButton that for various reasons I want to act like a button, but look like a JLabel. It ... lines of button.lookLikeAButton(false). 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 does “Reference implementation” mean?

I am trying to learn about CachedRowSet in Java, and I am reading some tutorials about it. I have come across ... vague for me to understand. 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 Joda Time

I am building an app that uses time. I decided to use Joda time. I am trying to add joda time to ... importing: import org.joda.time.DateTime; 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 - JPA / @PostPersist @PostUpdate - transaction

I am currently working with @PostPersist and @PostUpdate, and in those triggers I am persisting additional entities. ... will be rollbacked. 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 - Retrieve Context from a fragment

I created a class to retrieve comments from a JSON encoding from a PHP file. This class, extends from AsyncTask ... a fragment? Thank you. Sergi See Question&Answers more detail:os...

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

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276 views

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java - Retrieving type parameters from an instance of a generic base interface

Given 2 interfaces: public interface BaseInterface<T> { } public interface ExtendedInterface<T0, T1> extends ... anything meaningful back). 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 - Finding serialVersionUID of serialized object

Is there a way to determine the generated serialVersionUID of a serialized Java object? The problem is that I ... from the serialized data. See Question&Answers more detail:os...

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

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239 views

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java - Waiting for a Runnable to complete before running another Runnable

I have an Android app with a main tab activity, and several activities within the individual tabs. In my ... that was originally added 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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250 views

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java - Overriding server connector config with env variables with dropwizard

I have posted this question on dw mailing list but didnt get an answer. Can I assume the YML format below ... address What am I doing 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 - Refreshing Dagger 2 instance from Android Application class

I have a set of @Singleton and @Provides method in my module class for the purpose of creating Singleton instance ... same. 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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347 views

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java - How to determine when end of file has been reached?

I am trying to read text from a text file. I need help figuring out when the end of file has occured. How can I ... = true) { .... } 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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165 views

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java - File extension for a Serialized object

What file extension would be most suitable when saving a Serializable object to disk? FileOutputStream fos = null; ... .closeQuietly(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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394 views

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java - Using Spring MVC 3.1+ WebApplicationInitializer to programmatically configure session-config and error-page

WebApplicationInitializer provides a way to programmatically represent a good portion of a standard web.xml file - the ... > </error-page> See Question&Answers more detail:os...

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

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292 views

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java - How to make a JFrame really fullscreen?

In my Java application I try to make a JFrame really fullscreen by using this code: public class MainFrame ... JFrame from a eclipse plugin. 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 inherited overloaded methods

I have two classes: public class ClassA { public void method(Number n) { System.out.println("ClassA: " + n + ... () has an Integer parameter... See Question&Answers more detail:os...

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

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404 views

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java - JDBC Batch insert exception handling

I am performing a JDBC batch insert (inserting 1000 rows approx at a time) each time my program is executed. ... again? How to achieve 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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271 views

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java - Does CompletionStage always wrap exceptions in CompletionException?

The CompletionStage Javadoc states: [...] if a stage's computation terminates abruptly with an (unchecked) ... exception could be thrown.) See Question&Answers more detail:os...

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

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216 views

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java - How to retrieve a value from mongoDB, by its key name?

I am new to mongoDB. I am using java and mongoDB. I have a json like, [{ "_id" : { "$oid" : " ... can find find() and findOne(). 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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286 views

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java - Setting auto complete shortcuts in Eclipse

When programming Java in Eclipse, I can type syso and press control+space to auto-complete this and get ... to System.currentTimeMillis();.) 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 MVC @Valid Validation with custom HandlerMethodArgumentResolver

I want to register a custom HandlerMethodArgumentResolver that could handle the following @Controller handler method definition ... such a 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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390 views

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java - Iterate through each digit in a number

I am trying to create a program that will tell if a number given to it is a "Happy Number" or not. Finding ... find an answer in the Java docs. See Question&Answers more detail:os...

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

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183 views

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java - Two ways to check if a list is empty - differences?

I have a short question. Lets assume we have a List which is an ArrayList called list. We want to check if ... have list.isEmpty() method... See Question&Answers more detail:os...

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

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206 views

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java - Regex replace with the count of the match

I would like to replace a match with the number/index of the match. Is there way in java regex flavour ... . No current answers actually work. See Question&Answers more detail:os...

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

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