包含标签：Java 的文章
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Java – about map Confusion of containsvalue method
I have the following program, I have a HashMap The key of HashMap is a simple integer and the value is an array of int…… -
Java – using Otto, if I call it directly elsewhere, the method will only subscribe
I have a problem that one of my subscription methods will not be called for posts of the correct event type unless the…… -
Calculates the number of sequences in a vector
See English answer > How can I count runs in a sequence? 2 bin <- c(1,1,1) I'll get 5 I haven't found any existi…… -
Java – spring MVC with JPA data binding
My problem is to bind the data obtained by spring from the form to the JPA entity Strangely, if I don't look at bindin…… -
How to query bigquery through ODBC connection?
It would be nice to be able to use bigquery through ODBC I have used MySQL through ODBC, which allows me to switch to …… -
Java: implicit conversion of object at compile time does not work, but reflection can be used
The following codes are given: import java.lang.reflect.Array; import java.lang.reflect.Method; public class Test { …… -
Java – gradle build dependency throws classnotfoundexception
I am currently writing my first gradle build script to help build a simple java application from the command line Here…… -
Java – the functional interface of a generic method cannot be converted to a lambda expression
The functional interface of a generic method cannot be converted to a lambda expression public interface Pro{ publ…… -
Java – add directories to jars for inserting external jars or classes
I have a jar file, which is my application (built by gradle), and I want to add a directory. It is the "ext" folder of…… -
Does Java parallel flow use only one thread?
I am using the latest Java 8 Lambdas and parallel streams to process data ForkJoinPool forkJoinPool = new ForkJoinPool…… -
Multithreading – use omnithreadlibrary to write arrays that are slower in parallel than in serial
I am studying the implementation of differential evolution optimization algorithm and hope to speed up the computing t…… -
Java – when you call VaadinSession getAttribute in Vaadin 7, you need to lock it up.
I know it's necessary to call setAttribute (link), but what about getattirbut? Is it correct? public Object getMyAttri…… -
java – Selector. Close() close all client sockets?
I'm new to NiO sockets. I wrote a server using NiO sockets. Now I'm trying to write shutdown hook to ensure graceful e…… -
Java – Jersey resource with multiple paths
I am trying to migrate my resource naming from Portuguese (and singular) to English (and plural). I want to know wheth…… -
grails – java. Lang. illegalaccesserror: attempt to access class XYZ from class ZXY
I have a Grails application. If I start it through it, it works normally grails run-app In the early stage, I have dep…… -
Java – drag / move shapes around the JPanel
Yesterday I asked a question about how to draw a bounding box to maintain the internal shape and how to drag and drop …… -
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…… -
Why is this wrong? About Java 8 streaming media
public interface Filter<M> { public interface Filter<M> { boolean match(M m); public static <…… -
Java – get ultrasound from Android using frequency
I want to get ultrasound from any Android device, such as ultrasound with a frequency between 18khz and 19khz I use th…… -
java. Lang.numberformatexception: occurred for input string: ”
I have a problem deploying the application on the server (everything is OK on the local computer) In my application, u…… -
What is the best way to split an array in Java into smaller arrays?
What is the best way to split an array in a Java method into smaller arrays? I want to be able to put arrays of any si…… -
Java – the value of the nonvolatile variable during wait() and the notifyall() call in both threads
Suppose I have two threads a and B, and I have synchronization blocks in both threads, in which an int variable is con…… -
Java – separate arrays in other arrays
I have an array. I need to divide it into different arrays I have a string array that needs to be divided into differe…… -
Vector – “STD:: VEC” vs “Collections:: VEC”
Rust contains two identical (via API) VEC modules: http://doc.rust-lang.org/std/vec/index.html http://doc.rust-lang.or…… -
Java – you cannot set a custom dimension in Google Analytics properties of Android apps
Please find the tracking code below, GoogleAnalytics analytics = GoogleAnalytics. getInstance(this); Tracker t = analy…… -
Java – public key encryption and private key encryption
I implemented asymmetric encryption in the project, using "public key" to "Encrypt" messages and "private key" to "dec…… -
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 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 do loop increment
int i = 10; int i = 10; int j = 0; do { j++; System.out.println("loop:" + j); while (i++ < 15) { …… -
Java – openshift Tomcat log: Catalina Out and localhost Out content
I have deployed my war application under the openshift tomcat7 cartridge In my application, I use log4j My log4j Prope…… -
The collection object cannot display the output of some undefined values in Java, ArrayList and collection
When I try to print a collection object, it prints employee @ 122392iie92 Why print this instead of the details of the…… -
Java – count (*) (asterisk) on querydsl / MySQL?
The initial function is MySQL query, which lists all providers of all tags: SELECT * FROM provider INNER JOIN provid……