包含标签：Java 的文章
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java – Jongo vs(DBObject)JSON. parse
I try to find out the advantages of Jongo instead of simply using (dbobject) JSON Parse (...) unmarshalls the JSON com…… -
Avoid nesting if else / switches – Java
I'm reviewing some code (Java) and making changes according to the business logic flowchart The current code relies on…… -
Java – store data in memory
I have "table a" in the database, which contains three columns "col 1", "col 2" and "col 3", with about 1000000 (1 mil…… -
Java – the real advantage of the factory model
I've been using the factory model for a year Sometimes I just think the real advantage is clean code Let me explain, i…… -
Java is equivalent to Matlab’s’ EPS’ or numpy / Python’s’ spacing ‘function (floating point relative precision)
background Matlab's built-in EPS function [1] can take a value x and return "the positive distance from ABS (x) to the…… -
Javaw still creates a console window; Why?
See English answer > start a java program without the console6 java -jar Jython.jar init.py However, when I change …… -
Java swing gridbaglayout panel resizing problem
I'm making a simple little swing application for a relative, but I'm having trouble animating it This is the descripti…… -
Connecting from Java to SQL server using JDBC (Windows authentication mode)
I need to use JDBC 4.0 to connect from Java to SQL Server 2008.0 Class.forName("com.microsoft.sqlserver.jdbc.sqlServer…… -
Java – when to call getpreferredscrollableviewportsize() when laying out JScrollPane?
To implement the scrollable interface, you need to implement the getpreferredscrollableviewportsize () method This usu…… -
Java – use ‘select’ tags and entities in thymeleaf
I am creating a form with a select tag as follows: <form th:object="${version}" method="post" class="form-horizonta…… -
Java – XY position of a certain Z depth
In processing (Java dialect), there are methods screenx, screeny (and screenz, but we'll skip it now) Suppose I have a…… -
Java – hibernate sqlfragment memory leak?
I deployed a simple webapp on the Tomcat server Webapp is a rest web service. Each web resource loads data from MySQL …… -
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 – use JAXB to handle missing nodes
I am currently using JAXB to parse XML files I generated the required classes through the XSD file However, the XML fi…… -
JavaFX graphics bug with ProgressBar and slider
I am writing a small application (audio player with function); This is the code of fxml: <StackPane layoutY="64.0" …… -
Performance – unpacked boxed value in a vector of quads
I try to debug performance problems as part of more complex code It seems that the append function I used to create dy…… -
What is Java util. regex. Pattern. GWT substitution for quote (string ARG)
In my application, I need the following code: string1. replaceAll(string2,myConstatntString) The problem is that strin…… -
Does Java provide an executorservice that allows workers to execute on the same thread?
I am looking for an implementation of executorservice that will provide the following semantics Each thread is occupie…… -
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 …… -
Java – HBase: the filter is not applicable to negative integers
We have successfully implemented hifier's qualifierfilter and valuefilter (using binarycomparator), and they work norm…… -
How to evaluate the utility of recursive algorithms in Java?
Background: I'm trying to learn algorithms and Java Run 320 × 320 grid, 100 trials, 5 times faster than non recursive ……