包含标签：Java 的文章
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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…… -
Multithreading – you can cancel qfuture and report progress
The qfuture class has some methods, such as cancel(), progressvalue(), and so on These can be monitored by qfuturewatc…… -
Java – @ createdby how does it work in spring data JPA?
I used @ createddate on the entity attribute, and I saw it insert the date in dB I don't understand the purpose of @ c…… -
Java – constant warning when running Tomcat from IntelliJ
Suddenly, when I run Tomcat from inside IntelliJ, the output console is constantly bombarded by mail@ H_ 502_ 2 @ (ver…… -
Java – can spring / JPA / Hibernate use simple JDBC compatible drivers?
We have an application that uses the spring container on the server. It uses EJB 3 entities and hibernate to persist t…… -
Organize java code when using try catch finally blocks
I am a novice in Java I have a question about how to organize java code when using try catch finally blocks Suppose I ……