Java
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Java – jar in classpath
Is there a way to programmatically get a complete list of all jars in the classpath? I need this because we have behav…… -
Java – greenroot eventbus failed to send event
I'm using eventbus to pass from a long-running thread to fragments that update its UI This long - running thread is ba…… -
Random int function behavior in Java
I have the following code: public class Main { private static final Random rnd = new Random(); private static int get…… -
Java – how to crack this synchronization code?
I have the following code snippet synchronized (mObject) { if (mObject.variable != -1) { doThis(); …… -
Java – what is the difference between using @ import and @ importresource annotations in the spring framework?
I am studying for spring core certification, and I suspect it is related to the use of @ import and @ importresource a…… -
Multithreading – Perl threads separate themselves
I'm new to Perl (and programming, too) and have been playing with threads for the past few weeks. So far, I understand…… -
Java – container level versioned library shared by war
In a java servlet container (preferably tomcat, but if this can be done in another container, then say so) I want some…… -
Java – Jersey records all response times of the service
I have a Java application and I want to record all execution times of each rest service How to measure the execution t…… -
Java – JBoss wildly and Jersey web service deployment error jbas011859: naming context is read-only
I am using Jersey servlet (1.18.1) to process Java Web services projects When I deploy my ear file to JBoss wildfly (8…… -
Is it safe to run more than 1K threads in Java?
I'm making a program that tries to get all the possible results Threads in the program generate more threads (slightly…… -
Java – string index using replace all is out of range
How to replace mapdir surrounded by < >? To a certain string? String mapDir = "D:\\mapping\\specialists\\ts_gpc\…… -
Java – more appropriately, amortized o (1) vs o (n) for inserting unordered dynamic arrays?
This belongs to stackoverflow COM / help / on topic's "software algorithm", in this case, is a software algorithm that…… -
Java – spring boot application failed to start
I recently started using spring boot to develop a web application, ANF, and tried to create these two files according …… -
Java – a case insensitive sort set – maintains the same string in different cases
Today I have a case insensitive sort set, such as: Set<String> set = new TreeSet<>(String.CASE_INSENSITIVE…… -
Java optional question, did I do this?
I have a "bad habit" of throwing zeros somewhere, such as enumerator when something doesn't exist Example: private enu…… -
Assembly – returns the location of the program counter after the interrupt handler?
Hi, I want to know where the program counter is when the program returns from the interrupt service program? I know th…… -
How can I / O multiplexing be used to process requests asynchronously in a java server?
Suppose I'm writing a java server that communicates with clients over TCP / IP The server uses I / O multiplexing Ther…… -
Why is this wrong? About Java 8 streaming media
public interface Filter<M> { public interface Filter<M> { boolean match(M m); public static <…… -
Java – how to convert exchange attributes to uppercase in ‘simple’?
How do I convert attributes on Apache camel exchange to uppercase in the Apache camel expression language? for example…… -
Java – how to change the chart generated by Apache POI to not use smooth lines and display empty cells as gaps?
I use poi 3.12-beta 1, and the code can create a line chart containing multiple data sets and named Series in the lege…… -
What does Java – (savedinstancestate) mean
There are some codes in my main activities if (savedInstanceState != null) { mCurrentSelectedPosition = sa…… -
Examples of scanner errors in Java books?
I'm practicing HashSet from the Java books of cay S. Horstmann and Gary Cornell, and I think there's an error in the s…… -
Symfony – the difference between get (‘doctrine ‘); And getdoctrine();
In symfony, I found three ways to access the doctrine service and entity manager, as shown below: $em = $this->getD…… -
R. Do all x elements exist in Y
In R, how to test the elements of a vector that does not exist in another vector? X <- c('a','b','c','d') Y <- c…… -
Java – protects int, visible only to the specified method
Is there any way to make me invisible to other methods in the same class? private int i; private void updateI(int i) …… -
Java – why can’t I use generic types to implement non generic signatures
I'm a little confused about the java compiler I have an interface with "object" method signature: public interface Bea…… -
Java – find K minimum integers in the array
This is my code, which is suitable for finding 1-7 minimum integers, but 8 and 9 When I find the eight smallest intege…… -
Delete the object created in ArrayList in Java loop
I'm trying to delete the objects I created in ArrayList: turtles.add(new Turtle()); I want to get rid of the last turt…… -
Java – filter ArrayList with dates by start and end times
I am implementing a simple listview, where the data source is an ArrayList, which contains name, start and end dates I…… -
Why Java io. File does not implement autoclosable?
See English answer > why Java io. File doesn’t have a close() method? 5 try (File file = new File(FILE_NAME)) { …… -
Distributed HashMap or distributed information storage in Java
Does anyone know a good java framework for distributed hash mapping (DHT)? I used overlay Weaver some time ago, but th…… -
Java – unable to run program “/ applications / utilities / terminal. App”: error = 13, permission denied
I encountered a lot of complex problems when running the following code: package practice; import java.io.IOException……