Java
-
Java – memory efficient multivalued mapping
Hi, I have the following questions: The most efficient memory is to store string in sorted string array and provide co…… -
Cheat single inheritance in Java?
I heard that there is a way to cheat single inheritance and implement multiple inheritance in Java Does anyone know ho…… -
Java – how to add Web Tools Platform (WTP) in eclipse Kepler
I installed eclipse Kepler. Com on my system So far, I have developed J2SE application Now I want to develop J2EE appl…… -
Java – what settings do you need to make to use jsr-303 annotations in spring?
I downloaded spring 3 and put it on my classpath, but I couldn't import the @ valid annotation However, I can import o…… -
Java – create a custom 404 / 500 error page in the play framework
How to create a global custom to use play to view their 404 / 505 error page? Solution In play framework 1, you only n…… -
Hindley Milner algorithm in Java
I'm writing a system based on simple data flow (imagine it like a LabVIEW editor / runtime written in Java) Users can …… -
How to use Java annotations to modify the source code before final compilation?
From the apt tool page, I can create annotation processors to generate new derived files (source files, class files, d…… -
Is rxjava cache () the same as replay ()?
I want to know if there is a cache () operator that can cache x emissions, but it will also expire after a specified t…… -
Java – use common IO to compress the directory into a zipfile
I am a beginner of Java programming. I am currently writing a program that must be able to compress and decompress Zip…… -
Java – OSGi weavinghook example
Is there an example of using OSGi 4.3 woven hook service? What about AspectJ, ASM and javaassist? Does anyone really u…… -
Java – delete file extension
See the English answer > How do I trim a file extension from a string in Java? thirteen package.zip image.jpeg …… -
Java – using spring MVC and accepting post requests with wrong JSON will result in returning the default 400 error code server page
I'm using the rest API Receiving a post message with bad JSON (such as {sdfasdf}) will cause spring to return a 400 er…… -
Error using Weka API: class attribute not set in Java code?
I tried to use the Weka API in my java code I use j48 tree classification to classify my dataset in MySQL database, bu…… -
Index creation in elastic search through Java API
I use the following code to create an index in elastic search, Settings settings = ImmutableSettings.settingsBuilder()…… -
Java. util. HashMap – why does HashMap extend abstractmap and implement it?
See English answers > Why do many collection classes in Java extend the abstract class and implement the interface …… -
Java – compare get / put operations of direct and indirect ByteBuffer
Get / put from direct ByteBuffer is faster than get / put from direct ByteBuffer? If I have to read / write from the d…… -
Java – how to delete system. Java from the code base out. println
We have a huge (old Java) code base in which many files (about 5K) have system out. println. We plan to delete it for …… -
Optional parameterization using generics in Java
Can I specify a default type when parameterizing a class? // abstract class public abstract class AbsClass<T1 e…… -
Java – the difference between salt and key encryption
OK, so I'm trying to learn a little about encrypting messages in my java application I just found that salt is differe…… -
Java Web application initialization and shutdown
I try to initialize and close a webapp Including initialization and shutdown: > Hibernate(v3.6); > C3P0(v0.9.1.2…… -
Java – no virtualmachineerror guarantee
I come from C In the C world, we pay attention to exception security and note that mutator can provide different guara…… -
Is it acceptable in Java to use thread #stop() to kill a running thread?
Unfortunately, you cannot specify a timeout when using regular expressions for strings in Java Therefore, if you don't…… -
Java – why don’t I use @ batchsize in every lazy loaded relationship?
Hibernate's @ batchsize annotation allows batch fetching of deferred loaded entities For example If I had something li…… -
JavaFX – set two root nodes for TreeView
Is there a way to set two root nodes for a treeview? I found many examples if simple treeview, but no useful examples …… -
Java – gets the generic type of the “real” class
How do I get a "real" class of a generic type? For example: public class MyClass<T> { public void method(){ …… -
Java – spring, @ transactional and Hibernate lazy loading
I'm using spring hibernation All my hibernatedao directly use sessionfactory I have application layer - > service l…… -
Java – upgrade spring security oauth2
I'm trying to change the spring security oauth2 configuration from 2.0 Upgrade from 0.rc1 to 2.0 3.RELEASE. I copied t…… -
Java – I can’t divide two numbers correctly
int percent = (score/numberOfQuestions)*100; int percent = (score/numberOfQuestions)*100; progressText.setText(score+"…… -
Java – find out if sqlexception is raised due to repetition
I have a java program that is not related to the database. If sqlexception is thrown due to duplicate keys, I need to …… -
Java – implement prosody finder
Want to know if anyone has any tips, or can point me in the right direction, find / create some algorithm to find pros…… -
Java – check a data test – pair_ sum_ even_ count
As part of the recruitment process, I recently conducted an online test on data Within an hour, I was given two simple…… -
Java – is there any framework to synchronize data generated on one peer with all other peers in an unreliable network?
We are developing a system with the following requirements >There are n systems, each generating its own unique dat……