Java
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Java – set Boolean value to false redundancy?
I have read several previous questions and answers [or very similar] on this topic, but none of them really solve this…… -
Why can javac infer generic type parameters of functions used as parameters?
In the following example, why can the compiler infer that in foo Foo. 0 is called for the first time in test() A gener…… -
Java regular expressions run slowly
I tried to use the darling fireball regular expression for matching URLs in Java, and I found a URL that led to the ev…… -
Java – poolinghttpclientconnectionmanager does not release the connection
I use spring to achieve the following: On the server, I receive data through the rest interface in XML format I want t…… -
Java – why not simply disable unchecked warnings?
Developers often encounter "unchecked" warnings when interacting with non - Generic APIs Consider the following exampl…… -
Java – generate CSR using bouncycastle API
I was new to Java security and stumbled upon this library called bouncy castle But the examples they provide and the e…… -
Transparent background in WebView in JavaFX
I need to display my web view content on my parents' background image Is there a direct way? Solution WebView transpar…… -
Java – optionalint vs optional
When scrolling Java I was surprised to find that the optional < T > and optionalint have nothing to do with each…… -
Java – selenium 3.0 firefx driver failed with org openqa. selenium. Sessionnotcreatedexception failed to create a new remote session
Selenium 3.0 firefx driver via org openqa. selenium. Sessionnotcreatedexception failed: unable to create a new remote …… -
Java – in addition to a servlet, it also filters the mapping of all content for struts 2?
I have a struts 2 (2.1.8.1) web application My web XML looks like, <filter> <filter-name>struts2</f…… -
Java – obfuscate initialization of instance variables
I was taking the scjp test and did some simulation tests. I met this one: It asks what is the output of: class TestCla…… -
Java – trove library threadsafe?
Is GNU trove library thread safe I'm interested in tobjectdoublehashmap I read their documentation but didn't mention …… -
Java – long timeout in the while loop?
I've read that you should put object in a Java loop Wait() call The reason is that this thread may be awakened, and th…… -
WebView – JavaFX 8 webengine: how to from Java to console Log() from Java to system out？
I use JavaFX and JavaScript engine to develop applications in JavaFX web engine I want to get feedback from JavaScript…… -
Implement autocomplete in Java – did I do it right?
See English answers > create a autocompleting textbox in java with a dropdown list5 >Start > enter city name …… -
Java – in addition to a servlet, it also filters the mapping of all content for struts 2?
I have a struts 2 (2.1.8.1) web application My web XML looks like, <filter> <filter-name>struts2</f…… -
Java – why doesn’t Tomcat need to restart when JSP changes
I've been using JSP, servlet I know that as long as we change anything in the servlet, we need to restart Tomcat serve…… -
Java – if you do not specify my class, what is the default package for my class?
Let's say I have a name called main Java file, the code is as follows: public class Main { public static void main…… -
Java – lsserializer vs transformer serializes XML to string
I have to put org w3c. dom. Convert document to Java lang.String. I found two possible ways. One is to use org w3c. do…… -
Java – JTree rendering and jcheckbox node
I'm trying to modify the standard swing JTree to mix nodes with and without checkboxes Here is an example: When I try …… -
Java – logback is used, but log4j starts displaying warn no Appenders
I'm using logback for logging, but it's working all the time; One day I began to warn Log4j: warn did not find the app…… -
Inkscape plug-in to edit SVG code in real time
I'm looking for a plug-in for Inkscape (or any vector based editor) to view the code window next to the window with SV…… -
Java 8 date is equivalent to joda’s datetimeformatterbuilder, which has multiple parser formats?
I currently have a joda date parser that uses datetimeformatterbuilder and can receive six different date formats I'm …… -
The best learning algorithm for making decision tree in Java?
I have a data set that contains information such as age, city, child age, and results (confirmed, accepted) To help wi…… -
Java – jtidy beautiful print custom HTML tags
I try to use jtidy to print well formed HTML generated by users: <div class="component-holder ng-binding ng-scope u…… -
Java – it is necessary to have getters and setters in POJO
See English answers > are getters and setters poor design? 17 conventional advice seen Solution I don't think so. I…… -
Java – index and search date in Lucene
I tried using datetools The datetostring() method indexes the date It works properly for indexing and searching Howeve…… -
Open source java code style try / finally block
See English answers > java IO ugly try finally block12 InputStream in = null; try { in = acquireStream(); .…… -
Java Security Manager – what does it check for?
This @ l about Java Security_ 419_ 1 @ said: So what does that mean? Say, if I implement my own security administrator…… -
Java – how to get logger value in string array
I use log4j Logger, and I have used fileappender to write log values to files Now I want to display the log values in …… -
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java. io. What is the possible cause of IOException: “incorrect file name, directory name or volume label syntax”
I tried to copy a file using the following code: File targetFile = new File(targetPath + File.separator + filename); .……