Recent questions tagged java

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java - Struts 2 file upload : File object being null

I am trying to use Struts 2 file upload but it seems to me that its not working. Below is my code. UploadAction.java ... s:form> </body> </html> 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 - Getting error in executing OWL API

I am trying to execute following code. import java.io.File; import org.semanticweb.owlapi.apibinding.OWLManager; ... out. 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 - Using JaaS with Jersey on Grizzly

I'm trying to find a simple, flexible way to add JaaS authentication to REST. I found a post that I think ... to learn as much as 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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java garbage collection and null reference

In my studying for OCJP I came across the following question: class CardBoard { Short story = 200; CardBoard go( ... it eligible for GC too? 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 - Cannot add map in Android Studio as stated in Google "Getting Started" page; Android Studio gives error

I'm trying to follow the directions to make an app with the Google Maps API. To do this, I'm following the ... at a time. Any ideas? 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 - how to get client ip address?

I want to know that how can we know the IP address of client on server side in socket (java). Suppose there ... between client A and B request.? 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 mail along with embedded image using javamail

I want to send mail along with embedded image. For that i have used the below code. Its not full code. Its a ... it is not in the attachment?? 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 get Cartesian product from multiple lists?

Say I have several List<T>s, I will put them into another list or other collections, so I don't know how many list<T> I ... ,6],[2,4,5],[2,4,6] 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 - Jaxb: How to replace a class/binding in given object tree while unmarshalling

I have a given set of classes to unmarshall a xml into an object tree. Now I get a extended xml and want ... when new fields in xml appear. 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 - JSch SCP file transfer using "exec" channel

I'm very new to the SCP protocol and JSch. I have to transfer a file fro a remote device via SCP to ... implement that in JSch channel "exec"? 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 - Embed angular into spring application and access Spring Controllers when running ng serve

I plan to set up a Spring-Angular application. I started right away with an Hello World-example to test out how ... plugin> </plugins> </build> 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 - Guice: Cannot inject annotated type in Request scope

I am attempting to inject an annotated variable into the REQUEST scope: Map<Key<?>, Object> seedMap = ... annotated variables. 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 - Find all paths in a graph with DFS

Good morning! I'm developing an algorithm to find all the paths in an undirected, not weighted graph. I'm currently ... on how i can do 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 to limit the number of digits before/after/ a decimal point and also overall with regex?

I'm trying to check that a numeric value has a specific amount of digits. there shouldn't be more than 19 digits ... "1234.0").matches()); } 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 - BeanCreationException: Error creating bean with name 'flywayInitializer'

I am trying to run my project tests in a docker container. All of the tests work just fine when running ... I move them to docker container? 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 - ERROR: Cannot create PoolableConnectionFactory (isValid() returned false)

What is the problem? I Use H2 DATABASE Someone have a solution for my problem ? I Use H2 DATA BASE, Hibernate 5 ... .java:2290) ... 40 more 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 a MediaPlayer Singleton

I am new to Android developing and am starting with a simple soundboard application. I started developing a ... highly appreciated and 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 - Why does this code result in illegalMonitorState exception?

The code below is trying to insert a random value into a circular queue and remove it. However, there are some ... ; t2.join(); } } 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 - Application client using @EJB annotation and Maven on Glassfish

There is an example in NetBeans site how to create Application Client using simple projects (without Maven). There ... to use @EJB annotations. 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 - Struts2.3.12 junit4 testcase request & session are null

I have already gone through this solution : Struts 2 JUnit Plugin v2.2.3: Test Class Extending StrutsTestCase; ... /dispatcher/error_en_US.ftl] cannot be resolved to URL because...

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

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java - Parse multiple doubles from a String

I would like to know how to parse several double numbers from a string, but string can be mixed, for ... other characters and .? 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 - Load Properties from resources folder within JAR

I have a JAR file Movie Library.jar, its contents are depicted below: The class PropertiesUtils is resides ... appreciable. 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 - Parsing an ISO 8601 string local date-time as if in UTC

In java I need to make a Calendar object from a String in the format: yyyy-MM-dd'T'HH:mm:ss This ... to use JodaTime for different reasons. 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 - Making every pixel of an image having a specific color transparent

This question is a duplicate of this question: Making every pixel of an image having a specific color transparent But I ... save it as a 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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java - Android menu line break

I have the following Android menu XML file: <?xml version="1.0" encoding="utf-8"?> <menu xmlns:android="http: ... force a line break in the XML? 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 - Sort a 2d array by the first column and then by the second one

int[][] arrs = {{1, 100}, {11, 22}, {1, 11}, {2, 12}}; Arrays.sort(arrs, (a, b) -> (a[0] - b[0])); ... 1, 100} {2, 12} {11, 22} How to do 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 - NetLogo R Extension Installation Error in Mac OS X Yosemite

I am having problems installing the R extension for NetLogo. I'm using NetLogo 5.05 and version 1.3 of ... the extension working on Yosemite? 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 - The content of EditText contained into a Android ListView isn't saved

On my project I have to show to the user a ListView which is contained basically of EditText. It is like a ... phase, it loads the "" string See Question&Answers more detail:os...

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

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