Java
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Java-8 – why doesn’t map extend functions?
While using the new Java 8 stream API, I want to know why not: public interface Map<K,V> extends Function<K,V…… -
Multithreading – lockless memory reclamation with dangerous pointers
Hazard pointers is a technique for safely reclaiming memory without garbage collection and lock - free code The idea i…… -
Java – the best way to implement a large state machine?
Basically, I have a state machine that controls the attack of game characters, and its time is based on the length of …… -
Java – how to clear jtextfield when the mouse clicks jtextfield
When the mouse clicks on the text field, I need to make the program clear the text from the text field I've tried some…… -
Java – command button in JSF
How to implement the back button as a command button for general work? Unlike the back button, I don't mean the browse…… -
Closure in Java – syntax differences between the three main proposals?
Three main schemes for adding closures to the Java language have been proposed: >Bgga (bracha gafter Gosling ah é) …… -
Pure Java text interface for roguelike games
OK, that sounds like a crazy idea - but I'm interested in emulating the 1980s style roguelike game text interface in p…… -
How are enumerations internally represented in Java?
Java enumerations are classes They are compiled into classes How does the following example compile? What is "class"? …… -
Java – spring and Hibernate suddenly set transactions to read-only
We have one in JBoss 4.2 3, using spring 2.5 2 and Hibernate 3.2 6.ga. This is running on Linux jee01 2.6 16.60-0.54. …… -
Java – break down work into multiple threads
I have the following problems: for performance reasons, I need to split work across multiple threads, but I don't know…… -
Java – how to set JFrame as the parent of jdialog
I cannot set the frame as the owner of the dialog box Usually, when I extend the jdialog class to create a dialog box,…… -
How to return a boolean method in Java?
I need help on how to return a boolean method in Java Here is the sample code: public boolean verifyPwd(){ if …… -
Java language recognition
Is there open source java language recognition? Only for C / C UPD： I'm talking about human text language Example: My…… -
Java – is hashing a suitable solution? Am I overly complicated?
I wrote a 2D platform game. I need room (up to 4) doors I write it in Java, but the language doesn't matter Each room …… -
Java – get exception ora-00942: table or view does not exist – when inserting an existing table
When trying to insert a batch of rows into an existing table, I am getting the following exception I can confirm that …… -
JPA – missing descriptor for the native query result of eclipse link POJO – [class]
I use eclipse link to run some native SQL I need to return the data to POJO I followed the instructions of eclipse lin…… -
Align text with java graphics 2D
Can anyone tell me how to find text in Java 2D? This is the code that draws a list of naturally aligned text Font yFon…… -
Java – random can be obtained from the distribution of different mean and standard deviation Nextgaussian() sample value?
This is a combination of Java and basic mathematical problems From random The documentation of nextgaussian () shows t…… -
Java – the custom Jackson httpmessageconverter is no longer applicable to spring 4.2
I'm starting from spring platform version 1.1 3. Release update the application to 2.0 1. Release, which changes the S…… -
Java – the same method in the interface and abstract classes
I came to the situation: public interface Intr { public void m1(); } public abstract class Abs { public void …… -
Java – use JDBC to insert slowly on PostgreSQL
I work on a system that downloads data from a cloud system to a local database (PostgreSQL, mysql,...) Now I have a Po…… -
Java7 watchservice – how to detect renaming / moving of the actual monitoring directory
I am using watchservice to synchronize data files with the application workbench When I rename / move a monitored dire…… -
. Net – number of CLR and GC instances running on the machine?
I created 2 Net application and running on one machine – how many CLRs and GC will there be? Also: I want to have some…… -
Change the default button in Java to make it look better
I tried to imitate the default Windows XP simple calculator When I change the background color of buttons in Java, it …… -
Java: return class (not an instance)
Can I return a class as a static method? I'll explain I have: public class A { public static void blah(){} } public cl…… -
Parsing Facebook signed using java_ Request will return malformed JSON
I'm trying to parse Facebook signed in dopost of java servlet_ request. I use Base64 of Commons - codec - 1.3 to decod…… -
Java – matching wildcards are strict, but declarations cannot be found for elements
I'm using springsource Tools Suite 3 and trying to intercept Servlet's context In XML <?xml version="1.0" encoding=…… -
Java – Maximum traversal cost in matrix using dynamic programming
Suppose I have an M x n matrix in Java I want to find the maximum traversal cost from the first column to the last col…… -
Java library for text normalization
I'm looking for a Java library that allows text normalization Similar to normalizer, but wider (something like utf8pro…… -
Java iteration on a keyset
I have the following java code: public void myMethod (final Map pFeatureGroupsFromPackage) { final Set<String&g…… -
What is the difference between the Java – OSGi service tracker and the declarative service?
I'm working on OSGi services now. I have a question about using services in OSGi There are some different ways to regi…… -
Java – how to get the activity editor in the Eclipse Plug-in?
In my eclipse plug - in, I need to know if the editor visible on the screen has changed I'm getting the following acti……