Java
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What is the best open source web crawler tool written in Java?
What is the best open source web crawler tool written in Java Solution Try crawler4j You only need to implement a simp…… -
Valgrind and Java
I want to use Valgrind 3.7 0 to find a memory leak in my java native code I'm using jdk1 6.0._ twenty-nine To do this,…… -
Java – UUID randomly generated with duplicate
I use the following functions to generate UUIDs UUID.randomUUID().toString() In prod, we have 50 servers (application …… -
Java – extending annotated controllers in spring MVC
I'm developing a small project and have some existing code. I want to keep clearing my changes, so I need to extend an…… -
java – Google Protobuf ByteString vs. Byte []
I'm using Google's protobuf in Java I don't know what bytestring is I get the following definitions from the protobuf …… -
Java – why close () an input stream?
I have rich experience in Java programming language But I've been thinking, why close () Java io. What about InputStre…… -
Java – given a 2D integer array, recursively find the path with the sum of the given number
Given a two-dimensional array, I need to recursively return a matrix whose path sum is a given number The path matrix …… -
Java – is there an implementation of dukpt or ANSI x9 24 open source library [closed]
My task is to decrypt the device using dukpt protocol / scheme / algorithm The encryption algorithm itself is deSede, …… -
Java – how to create a polygon in JTS when we have a coordinate list?
We can use this coordinate list to create a linestring: Geometry g1 = new GeometryFactory().createLineString(coordinat…… -
java. Lang. outofmemoryerror: Web application usage on permgen space
I am trying to deal with the recent OUTOFMEMORY permgen problem One of the log fragments saved when an error occurs: j…… -
Java – failed task ‘: app: compiledebugndk’ cannot run this command NDK build cmd
Error:Execution Failed for task ':app:compileDebugNdk'. Error:Execution Failed for task ':app:compileDebugNdk'. Error …… -
Multithreading – how to minimize the cost of allocating and initializing nsdateformatter?
I noticed that using nsdateformatter can be quite expensive I find that allocating and initializing objects has taken …… -
Multithreading – Perl multithreaded programs occasionally crash
I wrote a program using multithreading in Perl I am using this program to understand how multithreading is implemented…… -
How to use opensh private key in Java?
I am generating a DSA key using the following command: ssh-keygen -t dsa Then, I try to sign the data using the bounc…… -
Java 8 uses generic type method references
I have the problem of combining Java 8 method references with generic types I have simplified my problem and made it c…… -
Java – NetBeans: handle the main artifacts of the project through Maven shade plugin
I'm using Maven shade plugin to build my project, and NetBeans 8.0 is complaining about the following warnings: The ma…… -
Java – how to add a row of data to JTable from the values received in jtextfield and combobox
I have a JFrame form with jtextfields, JCombo@R_759_2419 @Wait, I can receive these values to variables. Now I want to…… -
Java spring boot: I’m trying to add the CacheControl header to the responseentity
I'm not very good in Java spring, but I want to add cache control header to my responseentity @RequestMapping(value = …… -
Java – how to add local library paths to JUnit tasks?
I have a java project that uses this driver for serial communication The driver uses DLL under windows to create seria…… -
ORM – principle document of 1.2
Anyone knows 1 What happened to the doctrine document for x? Through their official documentation page (you must scrol…… -
Java – how to synchronize play services real-time multiplayer games
I'm using libgdx to develop an online version of the popular game pong I've started using Google's real-time multiplay…… -
Java 8 function interface assignment context
The question is about the allocation background of the functional interface – Predicate<String> p = String::isEm…… -
Java – where are the auxiliary courses in Guice jar?
I downloaded Guice 2.0 and 3.0 through maven, and I couldn't find the whole com. Com in jar google. inject. Assistedin…… -
Java – JSP view log file (e.g. “web tail – F”)
How to implement a JSP site containing a text area that displays the log files on the (Tomcat) server and refreshes au…… -
Java – how to correctly handle exceptions in JSP / servlet applications?
How to correctly handle errors encountered in servlets? Now, the application I inherited (using only pure jsp / servle…… -
Jsr-305 annotation replaces Java 9
So far, we have been using findbugs jsr-305 annotation (COM. Google. Code. Findbugs: jsr305), and everything including…… -
Java – why does LinkedHashMap maintain iterations of two-way linked lists
Because there is no internal and reasonable explanation in any thread >For insertion order, it's enough to maintain…… -
Java – why are variables not local in case statements?
I recently added another menu item to the Android Java application and was surprised that eclipse represents the varia…… -
Stanford’s POS tagger is used in Java
Mar 9,2011 1:22:06 PM edu.stanford.nlp.process.PTBLexer next Mar 9,2011 1:22:06 PM edu.stanford.nlp.process.PTBLexer n…… -
Java – how to index date fields in Lucene
I'm new to Lucene I must index the date field IndexWriter writer = new IndexWriter(FSDirectory.open(indexDir),new Whit…… -
Java – how to sort by count () in JPA
I am using this JPA query: SELECT DISTINCT e.label FROM Entity e GROUP BY e.label ORDER BY COUNT(e.label) DESC I did…… -
Java – Jersey client / jax-rs and optional (not default) @ queryparam (client)
I have a restful API. Its document says that a query parameter is optional and does not provide default parameters The……