Recent questions tagged Java

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java - What is the capacity of a StringBuffer?

When I run this code: StringBuffer name = new StringBuffer("stackoverflow.com"); System.out.println("Length ... hold before reallocating space? 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 - @Transactional (noRollbackFor=RuntimeException.class) does not prevent rollback on RuntimeException

@Transactional (noRollbackFor=RuntimeException.class) public void methodA (Entity e){ service.methodB(e); } ---service ... not exactly this one. 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 - /api-url has an empty filter list in Spring Boot Security

A Spring Boot app with REST services has to allow public access to certain services, while restricting other ... add a filter registration bean 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 - Multiple, combined OR conditions in ORMLite

I like to have a query like this: select data from table where (x > 1 and x < 100) or (x > ... of Where conditions. Thanks for any suggestions. 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 I got " cannot be resolved to a type" error?

I am developing a dynamic web project (RESTful jersey) under Eclipse IDE. Under src/my/demo/service folder I ... Explorer" view in Eclipse. See Question&Answers more detail:os...

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

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567 views

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java - Does closing a Stream close the BufferedReader source?

From the docs: Streams have a BaseStream.close() method and implement AutoCloseable, but nearly all stream instances ... that isn't necessary. 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 split up complex conditions and keep short circuit evaluation?

Sometimes conditions can become quite complex, so for readability I usually split them up and give each component a ... although it is uncommon. Thanks for all your input!...

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

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java - When are ALL the cases when the onSaveInstanceState() method called?

All the sources I read have all mentioned couple of cases and concluded with "a few other cases". What are ... called in a View/Activity? 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 a Spring bean injected in my custom Wicket model class?

In a custom Wicket class, not unlike the following, I'm using a service bean which should be injected by Spring, ... there. How can I fix 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 - How to binary (de)serialize object into/form string?

I need serialize objects into String and deserialize. I readed sugestion on stackoverflow and make this code: class ... it in string 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 - Is there a way to take away focus in javafx?

I know that your can give focus to a node in javafx by doing node.requestFocus(); but is there a way to ... or prevent focus on an object? 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 - Signing AWS HTTP requests with Apache HttpComponents Client

I'm trying to make HTTP requests to an AWS Elasticsearch domain protected by an IAM access policy. I need to ... so Jest can sign all requests. 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 create a URL based on controller and action method in Spring MVC?

I am using Spring MVC 3.0 I have a guestbook.jsp page where I want to create a link that points to ... //jira.springsource.org/browse/SPR-5779 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 is MouseAdapter an adapter?

The name (and javadocs) imply that MouseAdapter is an adapter (the design pattern). But I don't see it ... a random name that causes 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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771 views

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java - Junit difference between assertEquals(Double, Double) and assertEquals(double, double, delta)

I had a junit test asserting two Double objects with the following: Assert.assertEquals(Double expected, Double ... into account? 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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770 views

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java - Align Center Menu Item text in android

Using following code <item android:id="@+id/text" android:title="@string/mainMenu" android:enabled="false" android ... make it center in middle? 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 find all matches to a regular expression in android

How can I find all matches to a regular expression in android. I founds it for Perl, Python etc but not for 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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java - Does the use of ObservableList in JavaFX go against Model-View-Controller separation?

I am attempting a study of JavaFX because I want to use it as the GUI of my program. My question is ... and "View" in this scenario? 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 monitor folder/directory in spring?

I wan't to write Spring Boot Application in spring which will be monitoring directory in windows, and when I ... WatchService here } } Regards 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 - Troubleshooting "failed to create task or type foreach" when using <foreach>

I'm trying to use the foreach loop in an Ant script but I get the message: Problem: failed to create task or type ... d,e"> </foreach> </target> See Question&Answers more detail:os...

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

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266 views

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java - Google places API return a single type "car_repair"

I'm using Google places API and it is returning all the places in my location. However I only want it to ... therefore my API Key does 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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java - how android downloadManager do http basic authentication

I want to use android downloadManager to download files; But the url is in http basic authentication. And I can get ... ), user.getPassword())); 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 - Build error: missing artifact com.sun:tools:jar:1.6

Trying to build PlayN sample projects I get: Missing artifact com.sun:tools:jar:1.6 pom.xml /playn-cute line ... profile> </profiles> </project> 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 @CucumberOptions tag property using System.getProperty()

I am running a maven project in Eclipse for my Cucumber tests. My test runner class looks like this: @RunWith( ... a clever way round 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 - Why is Optional<T> declared as a final class?

I was playing with the following question: Using Java 8's Optional with Stream::flatMap and wanted to add a ... leave the class non-final? See Question&Answers more detail:os...

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

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512 views

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java - How to save file using JFileChooser?

I have a method in my application called "Save as" which Saves the image of my application on computer my ... .write(image,extension,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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282 views

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java - How to open another window in JavaFX 2?

I have made a simple JavaFX application, but I would like the main window to open a secondary window when ... simplest way to 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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336 views

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java - Apparent connection leak detected with Hikari CP

When using native sql operator IN i get exception. Although it throws an exception, it still works as ... .8.RELEASE] at org.springframework.web.filter.OncePerRequestFilter.doFilte...

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

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