Recent questions tagged Java

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java - How do I create a thread dump via JMX?

I have a Tomcat running as a Windows Service, and those are known not to work well with jstack. jconsole is ... a file? (similar to jstack) 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 - TestWatcher in junit5

I can't find any annotation which replace/working the same like TestWatcher. My goal: Have 2 functions which ... Fail? Do something else 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 - Self Executing Anonymous Functions via Lambdas

In javascript, there's the common pattern of creating an anonymous function and immediately invoking it (usually ... which utilize lambdas. 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 make a .dll created with IKVM com visible?

I have seen a few posts on this, but I haven't seen any solutions so far. I have a .jar file that I' ... something that can be used with VBA? 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 reserved JPQL keywords with JPA

I have an entity class called "Group" and NetBeans warns me "The entity table name is a reserved Java ... should I rename the class? 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 - Create jar file from command line

I have the following directory hierarchy : SigarTest src SigarTest .java files bin SigarTest .class files Here,SigarTest ... 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 - Adding interceptors in struts.xml for all Action classes

I've used the Struts 2 framework and I have created a web application which has a Login Page. I have ... <interceptor-ref name="newStack"/> 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 - Hibernate out of memory exception while processing large collection of elements

I am trying to process collection of heavy weight elements (images). Size of collection varies between 8000 - 50000 ... ); session.close(); } 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 PrintWriter buffered?

I know that the PrintWriter is really good if we want to write formatted data, and I also know the use of ... is buffered, but it seems so. 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 - Ambiguous method call when overloading method with generics and lambdas

I've noticed a weird behavior for overloading methods with generics and lambdas. This class works fine: public <T> void ... <T>test(Class<T>,T) 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 Broadcast Address

I am making a Client Server application for my Android phone. I have created a UDP Server in Python which ... or other Wifi networks. Cheers 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 a formatted date as milliseconds?

I have a formatted date from sqllite database, to use this in a graph view I need to format it in a long ... can I convert it to milliseconds? 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 - Convert a Ruby on Rails project to a JRuby on Rails project

is there any particular way to convert a Ruby on Rails project to a JRuby on Rails project? There now is a ... to make the conversion. 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 - Android http connecting with OkHttp Dont work

I am trying to use OkHttp but it keep crashing. Can someone have a quick look and see if you know whats happening. Thank you ... ", 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 - Eclipse RCP: Target platform - Eclipse vs. Equinox?

I'm just starting with OSGi and Eclipse RCP. Could someone explain to me the difference between "Eclipse" ... Plugin Project? Best 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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343 views

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java - How to extract JavaDoc comments from the source files

How do I extract the JavaDoc comments from the Java source files ? as well as format them as I want to? See Question&Answers more detail:os...

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

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232 views

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java - Runtime.availableProcessors: what is it going to return?

The javadoc for Runtime.availableProcessors() in Java 1.6 is delightfully unspecific. Is it looking just at the ... load in any effective 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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243 views

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java - values of input text fields in a html multipart form

I use Apache Commons FileUpload in a java server-side app that has a html form with fields : a destination fied ... of app)? Many thanks, Aurel See Question&Answers more detail:os...

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

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213 views

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java - how to upload a file using commons file upload streaming api

I am following the example provided in the commons file upload site about streaming API. I am stuck trying to figure ... doesn't know how to. 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 - deserializing a JSON object with multiple items inside it

I'm trying to deserialize (using gson) a JSON object that looks like this: "attachments": { "40": { "ID ... catch block e.printStackTrace(); } 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 - how to implement a factory that returns different implementations

Lets say I have a service called Guice service and here is its constructor public GuiceService(IPayment payment) { ... created by Guice? 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 - Is there a regular expression way to replace a set of characters with another set (like shell tr command)?

The shell tr command support replace one set of characters with another set. For example, echo hello | tr [ ... expression way to achieve 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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261 views

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java - Retrieving elemnts from an ArrayList by specifying the indexes

Is there a method in Java to get the list of objects from an Arraylist to another ArrayList, by just specifying the start and end index? See Question&Answers more detail:os...

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

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203 views

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java - GSON on Google App Engine throws a Security Exception

I am trying to convert an object into JSON using the GSON library on Google App Engine. For some reason, it ... json = gson.toJson(modelObject); 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 - Function and Predicate parameter ambiguous?

Using Java 8, I get a compiler error for the following code: public class Ambiguous { public static void call() ... I'm curious what causes 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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241 views

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java - Android sort array

i have a string array consisting of a name and a score. I want to sort that array by score. Problem is, ... } }); What is the solution? 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 - Deprecated annotations in FindBugs 2.0

Looking at the list of annotations in FindBugs 2.0, I see that a lot of them have been deprecated. ... or something, instead of 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 - Split date/time strings

I have a ReST service which downloads information about events in a persons calendar... When it returns the date ... "beginTime.set() " 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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