Recent questions tagged java

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java - How do I intercept button presses on the headset in Android?

I studied the ACTION_MEDIA_BUTTON intent and Im trying to use it and intercept the button presses and present them ... nothing seems to 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 - Android okHttp addFormDataPart dynamically for Multiple Image

Hello AndroidUploaders, I had given answer Uploading a large file in multipart using OkHttp but i am ... addFormDataPart() use dynamically? 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 - JavaFX stop opening URL in WebView - open in browser instead

The embedded WebView browser I am using needs special handling for particular URLs, to open them in the native default browser ... (e); } } }); 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 dynamically handle json response array/object using Gson

I am facing a problem , sometimes Json response returns an array of objects , sometimes object itself , how ... different jars 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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java - Executable JAR ignores its own Class-Path attribute

I used the instructions found at Maven - how can I add an arbitrary classpath entry to a jar to add an ... .jar;peer_example1.jar 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 - How access existing sqlite database on Android Emulator?

So im new to working with databases in android, and I cant seem to figure out how to view a created database. ... " doesn't yield any database. 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 use generated value within composite keys?

I have two classes documentlog and documentversion(with primary keys: int doc_id and int docVersionID) with a many-to-one ... .id = id; } } 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: Injecting different properties file according to profile

First, some context: I'm currently working on a project in which I use the Spring framework on Google's ... deployed locally or on GAE? 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 DBCP (Apache Commons Database Connection Pooling) still relevant?

The JDBC 3.0 spec talks about Connection (and Prepared Statement) pooling. We have several standalone Java ... recommended C3P0 over DBCP). 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 - Object equality in context of hibernate / webapp

How do you handle object equality for java objects managed by hibernate? In the 'hibernate in action' book they ... ID to an object? 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 - Try / Try-with-resources and Connection, Statement and ResultSet closing

I have recently having some discussions with my professor about how to handle the basic jdbc connection scheme. ... problems with this code? 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 - Use jsoup to parse XML - prevent jsoup from "cleaning" <link> tags

In most case, I have no problem with using jsoup to parse XML. However, if there are <link> tags in the ... jsoup from "cleaning" <link> 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 - String from EditText to float

I have an EditText for which will be using for a float number. So I'm trying to read the text from the ... before writing it to a variable? 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 get Spring MVC to invoke validation in a JUnit test?

I have a POJO called Browser that I've annotated with Hibernate Validator annotations. import org.hibernate.validator. ... JUnit? Thanks, Matt 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 use Hibernate validation annotations with enums?

How can I use hibernate annotations to validate an enum member field? The following does not work: enum ... UserRole. UserRole userRole; } See Question&Answers more detail:os...

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

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198 views

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java - JDK 11 SSL Error on valid certificate (working in previous versions)

The following code throws an error in JDK 11: HttpURLConnection con = (HttpURLConnection) new URL("https://sis. ... and 28 (release candidate). 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 - Jax-rs json pretty output

in Java when i use the @Produces("application/json") annotation the output is not formated into human readable form. How do i achive 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 - Is the firebase access token refreshed automatically?

I'm using the Firebase email/password authentication. After the user has signed in successfully I query the access ... not what I'm looking. 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 - Problem using generic map with wildcard

I have a method that returns a map defined as: public Map<String, ?> getData(); The actual implementation ... type anything? 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 can I refresh a JTree after adding some nodes to the underlying model?

First of all, let me say that I dont use the DefaultTreeModel. I implement my own TreeModel, so i cant ... solution? Am I missing something? See Question&Answers more detail:os...

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

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200 views

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java - Fastest way to read a file line by line with 2 sets of Strings on each line?

What is the fastest way I can read line by line with each line containing two Strings. An example input ... Any help is 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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java - Eclipse missing action Set

I have a problem while opening Eclipse. In the error log it says: unable to find action set org.eclipse.wb.core. ... what I am supposed to do? 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 generate an Eclipse project

I use eclipse to work on an application which was originally created independently of eclipse. As such, the ... often enough to automate. 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 should I use generics to define relationships between types?

Getting into a little bit of confusion here when to use generics. I've looked at Java Generics? but still ... they just used for collections? 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 request a URL that requires a client certificate for authentication

I need to request a URL from a server that uses client certificates for authentication and can't find a way ... to retrieve. 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 - Generating N numbers that sum to 1

Given an array of size n I want to generate random probabilities for each index such that Sigma(a[0]..a[ ... language are fine, Java preferred. See Question&Answers more detail:os...

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

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186 views

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java - How to find and stop all currently running threads?

I have an multiple-threaded java project and I want to add a method stop() to stop all the running threads. The ... State.RUNNABLE) t.stop(); } See Question&Answers more detail:os...

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

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478 views

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java - Convert a 2D array index into a 1D index

I have two arrays for a chess variant I am coding in java...I have a console version so far which represents the ... the fact its a 4x8 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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