Recent Posts
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Java – case insensitive string What is an alternative to the contains method?
See English answers > how to check if a string contains another string in a case insensitive manner in Java? 17 If …… -
Java: how to remove quotation marks from the JSON key using regular expressions
I need to remove double quotes (objects with sub objects and arrays in the hierarchy) from the complex JSON structure …… -
Java – TestNG – @ aftermethod priority
Can the @ aftermethod method method be called in a specific order? public class PriorityTest { @BeforeClass(alwaysRun…… -
Why does this code snippet not have runtime errors as described in the Java tutorials documentation?
public class @R_150_2419@ { public class @R_150_2419@ { private Object object; public void set(Object object)…… -
Java – why UUID Will the initial call to randomuuid () slow down?
Given the following code snippet, it generates a UUID Randomuuid(), I get the following performance results (in millis…… -
Java – Hal rendering cannot be obtained using spring HATEOAS and Jersey
I use spring initializr（ https://start.spring.io/ ）To create a starter application with only "Jersey (Jax - RS)" and…… -
Java generic: can generic extend another generic class?
Here, this is my problem. I have three summary classes, all of which are general. I want something like this: public a…… -
The Java size() function does not work in Processing 3.0
I tried to set the window size by passing parameters from image width and height in Processing 3.0 However, processing…… -
Java – gradle build error (Android studio 2.2.2)
I installed Android studio 2.2 with the necessary packages on Debian Jessie 2 and check for updates When the gradle bu…… -
Java object < = relational operator check
In Java, when = = is used to compare two objects, their references are also compared But what happens when other relat…… -
Does Java – JIT optimize new objects?
I created this class, which is immutable and has a smooth API: public final class Message { public final String em…… -
Java – refactoring code
I'm learning the gradle tool API I have two methods, only one line of code is different I need your advice on how we c…… -
Java – how do I detect if the MIME type is an executable?
I am using Apache Tika to detect the MIME type of the input stream http://www.file-extensions.org/filetype/extension/n…… -
Java, Apache POI, memory leak and excel file
I need to read (15000) Excel files for my thesis I'm using Apache POI to open them and analyze them later, but after a…… -
Java – @ reference session displays an unsatisfactory error
I'm using the sling servlet Because I use javax jcr. Session as a reference How can I solve this problem? Solution jav…… -
Java – dagger 2: error getting multiple instances of the same object using @ named
How can I get multiple instances of the same return type like a cursor For example:- Module @CursorScope public class …… -
Java 8: are longadder and longaccumulator the first choice for atomiclong?
Longadder as a substitute for atomiclong ExecutorService executor = Executors.newFixedThreadPool(2); IntStream.ran…… -
Definition of constant field in Bloch’s effective java version 2
quote: I'm not sure what that means; Can anyone give an example? Solution An example Josh is talking about is list, wh…… -
Java spark streaming JSON parsing
I have started to learn spark flow from spark engine, and new data analysis and spark I just want to create a small IO…… -
Java – avoid isinstance statements
How can I refactor this example to avoid the need to check isinstance in each data type? Can I follow any pattern? pub…… -
Java – prevent jsup. Java Parse delete end tag
I'm using jsup Parse parses a piece of HTML Everything else is great, but I should parse this HTML later in the PDF co…… -
Rxjava allows multiple onerror calls
I tried to allow unlimited flow on the next and wrong call The following code uses the retry () method. I assume that …… -
Accessing nested fields in Avro genericrecord (Java / Scala)
I have a genericrecord with nested fields When I use genericrecord When get (1), it returns an object containing neste…… -
Convert from swing to JavaFX?
When converting a swing project to a JavaFX project, which classes in JavaFX match the swing class? 1 - 1 is the best …… -
Comparing “queue” objects in Java
I am currently studying the properties of the queue interface and encounter the following declaration in Java document…… -
Exponential backoff in rxjava
I have an API that accepts an observable that triggers an event I want to return an observable. If an Internet connect…… -
Java – game code behaves differently between MAC and windows
import java.awt.*; import java.awt.*; import java.awt.event.*; import javax.swing.JFrame; public class Game extends…… -
Java – how far can I count from 1, up to N times when I can use any number
My questions are as follows; For the number n, I need to find the maximum value I can calculate. Each number can be us…… -
Java files: suppress hard coded text warnings?
Because I have to add a separator in textview (e.g., ",...), I will receive a hard coded text warning (don't conceptua…… -
Instance initializer in java interface
Hey, I wonder if I can initialize the interface when making the implementer It's like a blank constructor in an abstra…… -
Java – how to set the default media type for spring data rest?
From the repository restconfiguration, I can see setting up spring data. rest. Default media type = Application / JSON…… -
Java – build error: Jack needs build tool 24.0 0 or later
I use the RX Library in my android project, and for some reason, I need to build Gradle as: apply plugin: 'com.android……