包含标签：Java 的文章
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How to use Jackson to serialize / deserialize Java util. stream. Stream？
Suppose I have the following objects public class DataObjectA { private Stream<DataObjectB> dataObjectBStrea…… -
java – Play Framework 2.4 Ebean
I was learning how to use ebean orm in the play framework, but I encountered an error Stockitem class: import com.avaj…… -
Java – pass the inline constructed class to the method as a class parameter
I need to call the following method void foo(Class<? extends Bar> cls); For the CLS parameter, I need to pass a …… -
Java – the way to invoke Android services in different threads. Is it still running on the main thread?
If I understand correctly, by default, Android services run on the main UI thread However, my problem is that if Servi…… -
Multithreading – JavaFX task Updatevalue triggers only the first change event
I want to observe the valueproperty of a task and take action when updatevalue () changes The change event seems to be…… -
Java – bitmap font reversal when using assetmanager
Today, I started using assetmanager in libgdx to load my assets Before that, I had loaded everything into a separate c…… -
Java – how do I get the next key from a specific key in the map?
I have something similar: Map< Integer,String> topology = new TreeMap< Integer,String>(); These include, f…… -
Why is “” marked for Java in sonarqube
In Java, I can convert int to string by "" intvalue Why is this inappropriate As far as I know, integer ToString (intv…… -
Java split – wrong length
Why do I receive a length of 3 instead of 4? How can I solve this problem to get the right length? String s="+9851452;…… -
JavaFX scrollpane – check the displayed components
I want to know if there is a scrollpane attribute in JavaFX 8 that can be used to listen for components currently disp…… -
General functions in Java
I'm not familiar with some general syntax in Java public static<T> T foo(T... a) Can anyone explain its meaning …… -
Java – HashMap that maintains the original key / value when entering duplicate keys
Can HashMap retain its original key / value pair when entering duplicate keys? For example, suppose I have something l…… -
Java – what is the difference between using mappartitions and combining broadcast variables and maps in Apache spark
In spark, we use broadcast variables to make each machine read-only copies of variables We usually create a broadcast …… -
Java – exclude packages from gradle dependencies
I encountered a problem that multiple versions of the same class appeared in my classpath The problematic class is jav…… -
Java – why not ArrayList < > Add() work?
I'm new to Java. I'm currently using Android studio I just can't understand why Add does not work Topics and jobs are …… -
Java – how to access LinkedList in main from my JFrame button call
:::::: update::::: I tried to update my JFrame to take LinkedList as a parameter. It looks like public userLogin(Linke…… -
Java – illegalargumentexception when trying to import xlsx data into R
When importing the xlsx file into R, I faced the following errors – mydata <- read.xlsx("C:\\Users\\aniruddha\\Down…… -
How to convert javax xml. datatype. Duration
I have javax from the server xml. datatype. Response in duration format thank you. Solution A simple and direct soluti…… -
Java – randomly divide a given number m into N parts
Therefore, the idea I have is to be able to divide $2.00 into 10 people, and each person will receive a random amount …… -
The rcpp function adds the elements of a vector
I have a very long parameter vector (about 4 ^ 10 elements) and an index vector My goal is to add up all the parameter…… -
Create a program in Java. If a year is a leap year, return true; otherwise, return false
This is my code public class Leapyear{ public static void main(String []args){ for(int year =2000; year <=202…… -
Java – loads the fxml file located in the “SRC” Maven folder
I am developing a JavaFX 8 (Maven) project I want to store the fxml file in the source (not in the resource) folder ne…… -
Java – when there are escape quotes or outside parentheses, separate commas outside the quotes
Can I split strings using the following criteria? for example String source = "to_char(DATE,'YYYY,MM,DD'),'I am sad :(…… -
Java-8 – building Maven assemblies in Java 8
I changed the Java version used in my project Now I'm using Lambdas expressions If I compile IDE (IntelliJ), it works …… -
java – spring data redis master slave config
Here is my jedis configuration @Bean public JedisConnectionFactory getJedisConnectionFactory() { JedisConnectionFa…… -
Java – analog type conversion object
I have a simple method in the bean to handle cell editing events in the primefaces data table The method is as follows…… -
Java – loop for checking the list of items in selenium webdriver
I have written the code for the check list web element below, but the following code is running, but only the first it…… -
Java – heap space issues outside the NetBeans IDE
Editor: I finally made a combination of two suggested answers, so I answered my own question, which is accepted below.…… -
JavaFX and network
I am a novice in socket and network programming. This is my attempt to create a simple chat server. My code seems to h…… -
Java – the following code runs successfully. Does that mean we can start the thread twice?
The following code runs successfully. Does that mean we can start the thread twice? public class enu extends Thread { …… -
Java – Maven surefire permgen out of space
Many methods were tried to increase the size of permgen, but there was no luck I use the following configuration in my…… -
Java – upload files using HTTP handler
I'm trying to upload files (Multi - part form data) using HTTP handler WebKit boundary is writing to the target file, ……