Recent questions tagged JAVA

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java - Read response body in JAX-RS client from a post request

Having some sort of proxy between a mobile app and a web-service, we are puzzled by the response when ... String) from the server response? 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 hex color value ( #ffffff ) to integer value

I am receiving hex color values from a server (in this form, #xxxxxx , example #000000 for black) How do I ... to a hex String in 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 - DES Send and Receive Modes for DESFire Authentication

I'm trying to authenticate DESFire card with my android application. I use the example in this link to decypher ... question for the first time. 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 - javac.exe AST programmatic access example

Is it possible to access the Abstract Syntax Tree(AST) inside the javac.exe programmatically? Could you provide an example? 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 - SpringSecurity - Custom automatic authentication

This is my scenario: a web-app perform a sort-of SSO for many applications logged-in user than click on a link ... push ;) Thank you again, Luca 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 IP address and names of all devices in local network on Android

I want to see all the connected devices on my network with java, but I can't get it working. I have ... answered for over a year. Source 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 balance web application

There are load balanced tomcat web servers. Every request could be served by different tomcat server. How could ... ) based web application? 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 - Maven - Can't Execute JAR

After building a sample mvn project, I added my org.restlet dependencies & Java code. Then, I successfully built my ... my-app-1.0-SNAPSHOT.jar 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 - Which Tomcat 5 context file takes precedence?

Tomcat documentation says: The locations for Context Descriptors are; $CATALINA_HOME/conf/[enginename]/[hostname]/ ... order of precedence? 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 - Low latency audio api for Android?

What are my options for playing simultaneous audio on an Android device with the least amount of latency? Am I ... call to SoundPool.play(). 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 - Given n and k, return the kth permutation sequence

The set [1,2,3, ,n] contains a total of n! unique permutations. By listing and labeling all of the permutations in order ... , n, k, fact); } } 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 - Flatten a Map<Integer, List<String>> to Map<String, Integer> with stream and lambda

I would like to flatten a Map which associates an Integer key to a list of String, without losing the key ... , readability) to do 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 - singleton using enum

I read a lot on stackoverflow regarding the creation of singleton classes using enum. I must have missed something ... 't find anything 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 - Find known sub image in larger image

Does anyone know of an algorithm (or search terms / descriptions) to locate a known image within a larger image? e ... watch" it for changes. ** 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 - Securing Jersey based REST service using oAuth 2.0

I have created RESTful services in java/netbeans using the Jersey Library. Now i want to secure this service ... anything useful in google. 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 is the difference between a "Spring transaction" and a "Hibernate transaction"

Could you please explain the difference between the following two types of transactions: Hibernate transaction ... @Transactional annotation. See Question&Answers more detail:os...

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

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401 views

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java - Jars not copied to Tomcat's lib folder

I am doing some basic spring stuff and stuck at some point. I am getting ClassNotFoundException whenever I deploy ... a Maven project. 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 can't an abstract method be synchronized?

I was reading a thread from CodeRanch saying that abstract methods could not be synchronized due to the fact that an ... explain why I'm 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 - What is a good strategy for converting jpa entities into restful resources

Restful resources do not always have a one-to-one mapping with your jpa entities. As I see it there are ... but open to other technologies) 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 - Selenium: How to make the web driver to wait for page to refresh before executing another test

I am writing Test Cases using Selenium web Driver in TestNG and I have a scenario where I am running multiple tests ... or 3 sec or 5 sec) 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 - PermGen space error - Glassfish Server

I am running java web application using Hibernate and glassfish Server. I am getting java.lang.OutOfMemoryError: PermGen ... it doesn't 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 - What is the best way to pass information between threads?

I want to be listening to a server while my program is doing other things, when a message is received ... use of the synchronized modifier? 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 string.intern() so slow?

Before anyone questions the fact of using string.intern() at all, let me say that I need it in my ... resulted in similar results I think) See Question&Answers more detail:os...

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

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294 views

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java - How to validate xml against xsd and get *ALL* errors?

I have a standard code like below to validate xml against xsd, but it throw exception on first error and stops. ... { 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 - Code duplication caused by primitive types: How to avoid insanity?

In one of my Java projects I am plagued by code repetition due to the way Java handles (not) primitives. ... writing it six or seven times? 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 design: Adapting to multiple screen layouts by showing/hiding fragments within a single Activity?

I am trying to understand how to use Fragments to create apps that adapt well to multiple screens and ... with layouts and combinations? 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 - Grouping elements of a list into sublists (maybe by using guava)

I want to group elements of a list. I'm currently doing it this way: public static <E> List<List<E>> ... do this, preferably by using guava? 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 IllegalAnnotationException is thrown during parsing XML

This is my XML file: <fields> <field mappedField="Num"> </field> <field mappedField="Type"> </field> </fields> I ... use JDK 1.6_0.0.7. 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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