包含标签：Java 的文章
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java – ExecutorService. Submit (callable) returns a null value for the future object
I am using executorservice to generate threads that perform different tasks When submitting the (callable < T >)…… -
Java – regular expressions X and / or y
Consider the following regular expressions, where x and y are any regular expressions XY|YX|X|Y This regular expressio…… -
Java – how to use ebean to query tables with one to any and many to one relationships
I'm using play framework 2.1 0 and ebean, encountered a problem when querying the following scenarios listed below: I …… -
Asynchronous I / O – Java
I've been looking for details about the benefits of asynchronous I / O in Java, especially from application stack desi…… -
The fastest way to query XML in Java
See English answer > efficient parser for large xmls4 DOM – XPath: this takes a lot of time, DocumentBuilderFactory…… -
Symfony – how to combine translatable and sluggable in doctrine extensions?
I have installed https://github.com/stof/StofDoctrineExtensionsBundle And use translatable and sluggable on specific f…… -
The best way to distinguish between estale and enoent in Java
I am trying to write Java applications running in Linux environment on NFS file system I noticed that when I called Ja…… -
Play framework 2.1 Java / Eclipse: automatic reload does not work
Question /: >The view is being compiled, but if you do not manually restart the server, refreshing in the browser w…… -
Java – regular expression lookup substring
Suppose I have a substring BB, which can be separate or part of a longer string, such as BB or AA | BB | CC or BB | CC…… -
java – GrizzlyServerFactory. The difference between createhttpserver and the new grizzly webserver
I am using Jersey and embedded grizzly web server to create restful web services I see two ways to create an embedded …… -
Emacs – how to execute autocomplete queries in the background?
I'm very excited about Emacs autocomplete mode But my code base is very large. Sometimes, when I type, it will try to …… -
Java try / catch problem
I'm new to Java. I always encounter problems with the try / catch function in the code, so I wonder if you can help me…… -
Java – use try catch finally to return the type
See English answers > java's return value in try catch finally mechanism4 private Integer getnumber() { Integer…… -
Java – what is the best practice for socket programming – do I turn it off or leave it open every time?
I haven't found a definite answer yet I have a client / server application in Java 7 The server and client are on sepa…… -
Click the selenium Java button
I have a button: <input type="button" onclick="onOpenSessionClick()" value="Open device access"> But when I exec…… -
Java – filechannel ByteBuffer and hashing files
I built a file hash method in Java, which accepts the input string representation of file path and file name, and then…… -
How to determine if another process is using the file (Java)
I tried many examples, but no one worked I also try to use trylock() It always returns false Why? private boolean chec…… -
Java – @ stateless WebService with JPA JTA: how to submit changes to managed entities?
I have the following simple WebService declared as @ freeless EJB in GlassFish 3.1 Run on 2.2, eclipse link 2.4 1. Use…… -
Java – append video files with different widths and heights
I'm building an application where users can record screenshots An integral part of the application is that you can tem…… -
How to connect to gromy’s JMX faster
I use the Weblogic example: http://groovy.codehaus.org/Groovy +And + JMX connects JMX to groovy The problem is that th…… -
Java – joda time days since the era
I have a question, @ L_ 419_ The number of days since epoch returned by 0 @ library changes according to the date I en…… -
Cross platform with asynchronous support Net websocket server Library
Are there any cross platform (read: single friendly) libraries that provide websocket server support and allow asynchr…… -
Java – using enumerations in Scala
I have Scala style enumerations object SomeObject { final object SomeEnum extends Enumeration { type SomeEnum =…… -
Accessing C constants (titles) from JNI (Java Native Interface)
How do I access constants defined in C header files from the Java side (through JNI)? I have a header file C_ header. …… -
Java – from system In get Unicode value
I created one from system In to get the input scanner so that I can get the input from the console Scanner scanner = n…… -
Java – publishes formdata objects using the input type and the file NullPointerException
I'm trying jQuery Ajax publishing using input type files and normal input types with text, and using request Getparame…… -
Java – use Apache httpclient to make rest calls with data and headers
In addition to mobile applications, I also need to integrate Kii mbaas services into one of my web applications I use …… -
How do I send events (push notifications) from Java EE applications?
I have a Java EE application where the model is updated very frequently from various sources In addition, I have a ric…… -
Java – add setup steps for multiple JUnit test classes
In a project, there are multiple test classes, and each test class contains multiple test methods For example, I want …… -
Java – error syntax SQL exception when reading value with rowmapper
This is my model class //Model public class CustomerData { private String locomotive_id; private…… -
Java – how is “AAAA” different from “yyyy” in the context of year values?
Referring to simpledateformat docs, the mode character representing the year is y, so we have YY and yyyy (2013 respec…… -
Multithreading – restart Delphi TThread throughout the application lifecycle
I created a class derived from TThread because I wanted to do something asynchronous, but in order to avoid creating a……