Java
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Emacs – Tuareg mode and CAML mode
I am currently using Tuareg mode, but I hope to be able to use the function of cam mode In particular, I want to be ab…… -
Java – how to ignore checkstyles on methods based on specific patterns
Does the checkstyle rule methodlength have a way to set the mode for the method to be ignored? I want to disable the c…… -
Java – why should you try to throw an unchecked exception on a checked exception?
See English answers > the case against checked exceptions 32 If I have this method title, two exceptions will be th…… -
com. sun. JNA and net java. What is the difference between dev.jna?
I'm looking at the central Maven repository and looking at net java. Dev.jna and com sun. jna groupId for JNA. JNA's G…… -
Java – calculates the nth floating point number
Using 32-bit floating-point numbers, I think there are floating-point numbers like 2 ^ 31 – 1 In Java, you can use an …… -
With automatically generated classes Net ORM solution: subsonic, Castle AR?
I used to use custom data mapping libraries, and I'm trying to switch to a broader ORM solution After some experiments…… -
Java – why can’t @ safevarags be applied to instance methods in the final class?
According to the document of safevarargs, the @ safevarargs annotation can only be applied to static or final construc…… -
Unit test – parameterized JUnit test without changing the runner
Is there a clean way to run parameterized JUnit 4 tests without changing the runner, that is, without using I have uni…… -
Java – mapping multi-level inheritance in Hibernate
At present, I have such a structure: A | +--B | +--C It uses join tables to map one table per subclass For historical …… -
Java – jcombobox on JPopupMenu
I'm trying to use composite swing components as part of the menu Everything works well except for one detail: the comp…… -
Java – web client for Web Services
When I access it from a J2SE (desktop) application, I have a working web service To access this service, I will follow…… -
Multithreading – the parbuffer evaluation does not give the expected acceleration
I have a Haskell function, and I want to evaluate it with accurate intermediate results: f 0 x = 0 f n x = let tmp = f…… -
java. Lang.noclassdeffounderror: in anonymous inner class
I use sun / Oracle JVM 1.6 on Linux red hat_ 23 run this code on a VMware server Sometimes the JVM seems unable to acc…… -
How to reduce the size of image file in Java
I want to reduce the image file size of uploaded images before saving to the server (to reduce loading time) How can I…… -
Lightweight and low latency Java network library?
I'm studying a client server pair in which a multi-threaded client performs thousands of server calls per second. The …… -
Why is the Java division of integers faster than the joy of hackers
I'm testing the throughput of divs10 function from hacker joy book, in my JDK 1.7 64bit version 21 and i7 Intel @ R_ 6…… -
Java – how to specify multiple fields as the primary key of an entity (using JPA)
See English answers > JPA composite primary key 2 Suppose we have a personnel table of SSN, nationality and name An…… -
Java – set the file name of the PDF that flows back to the browser
I have a Java webapp to create a PDF and stream it back to the browser byte[] pdf = report.exportPdfToArray(user); res…… -
Using Gmail as an SMTP server in Java Web applications is slow
I wonder if anyone can explain to me why every time my java web application uses Gmail's SMTP server to send e-mail, i…… -
Java Swing: focus issues
I'm making a level editor for my game I have a property panel where I can modify the properties of the selected object…… -
Numpy – is there an equivalent of SciPy for 2D arrays signal. Deconvolve stuff?
I want to deconvolute 2D images with point spread function (PSF) I've seen a SciPy signal. The deconvolve function app…… -
Calling ExecutorService. in Java shutDown()
I began to learn the executorservice class Documentation (and online tutorials) says executorservice is always called …… -
Generics – rule variations in bounded wildcards in java-8?
I am in the tutorial of defining this static method according to generics in Java: public static <T extends Compara…… -
Java – what buffering strategy should I use for 2D scrolling maps?
So I'm creating a top - down 2D game in Java I follow the instructions of Java 2D: hardware acceleration – Part 2 – bu…… -
Java – ‘Maven jetty: run’ how does it work?
What I learned is: >Jetty is a java servlet > Maven is a build automation tool mainly used for Java projects >…… -
From Java util. List get class
How to get Java. Net from this expression util. Get class from list Solution I assume that you want to know the templa…… -
Java – SBT build, run the main class of the subproject on compile and run
I have a simple build tool multi project problem I have the following directory structure to represent my java SBT pro…… -
Java – JPA @ ID and insertable = false, updatable = false throw exception
I'm using Oracle database. I have sequences and triggers to generate and store IDS before insertion CREATE SEQUENCE CA…… -
Java – why can only some XPath expressions find nodes when XML has a namespace prefix
In the following example code, any XPath of the form '/ / elementname' will return null when the source XML has a name…… -
Java 9 zip end header exception not found
I tried to use Java – SRTM files to batch download zip files from this URL. It requires a user name / password to down…… -
Java – spring Mongo > how to get the list aggregationoperations from aggregation
I have a function that takes aggregation as a parameter I want to get all aggregationoperations from the aggregation I…… -
Kill the thread on the running VM (JBoss instance) using Java?
A bug in a third party library causes an infinite loop in the working thread on my JBoss instance Do you know how to k……