Recent Posts
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Go – concurrent file system scanning
I want to get the file information of the files in the directory (file name and size, in bytes) But there are many sub…… -
Java 8 lambda specifies the map type and makes it immutable
I have the following code, generated using Lambdas for several months Map<Integer,String> tempMap = new LinkedHa…… -
Java – Convert list to map and filter null keys
Using the Java 8 stream, I want to convert the list into a map as described in the solution of Java 8 list < V >…… -
Java – programming the difference between POJOs and beans
I have the following two classes Can I say that the first is a POJO class and the second is a bean class? 1) POJO clas…… -
Java – tells class members the type of variables at creation time
Suppose I have a citydistrict class, as follows: class CityDistrict { List<House> houses; ... } Suppose …… -
Java – instead of creating a new string object, print a string with edit characters using a char array
The purpose of this code is to change the string "a happy" to "a hippy" String originalStr = "A Happy"; char[] charOri…… -
Java – why can’t I import appium if it’s in my gradle dependency?
I'm building with IntelliJ Community Edition with gradle This is my build gradle deps： dependencies { testCompile…… -
How to apply some changes to each element in the list > structure using java 8 methods
I have some structures like list < < list < < double > > Listofdoubles I need to convert it to list …… -
Haskell – idiom prefetching in streaming Library
I am using the streaming library, but I will accept the answer of using pipeline or pipeline Say I have import Streami…… -
Java – steps in the alloure2 listener output console
I'm using allure2 and TestNG I want to write my own listener and print @ steps. In the console output I saw the interf…… -
Java – which file is read when you run “. / gradlew” on the command line?
I did some digging, but I didn't find much information My best guess is build Gradle files are the default, but I'm cu…… -
Java – starts the enumeration as a value
I want to declare enumeration variables as values How can I do this? For example: public enum CardSuit { SPADE(0),H…… -
Java – is the order of variables important in packet change read / write operations in Parcelable?
I have the following implementation of a Parcelable class: public class DemoModel implements Parcelable { private …… -
How to prevent Java from separating JSON strings passed as command-line parameters into single subunits of args []
I want to pass this JSON string to the Java class through command - line arguments However, in each space, the string …… -
How to wrap Java util. Iterator to change the type of the object being iterated
I'm providing some appearance classes for third-party APIs. I need to wrap an iterator so that I can replace things it…… -
Unit test – unit test vertx – Java util. concurrent. TimeoutException
I'm trying to test HTTP calls from the vertx webclient unit using the rxified version of vertxunitrunner and vertx The…… -
How to declare a class containing generic type fields in kotlin?
I have a data class in kotlin data class APIResponse<out T>(val status: String,val code: Int,val message: String…… -
Repeated projection of Java nested mapping
Why does the actor work? import java.util.HashMap; import java.util.Map; public class TestMap { public static voi…… -
Java cucumber: obtain @ cucumber options from external sources, such as property files
Whether it can be from Java Get the cucumber option value from the properties file? In this so post, it shows that it …… -
String concatenation does not work in Java when concatenating two results of a ternary operator
Dear Java master! Please explain why concatenation does not work properly in Java when connecting two results of terna…… -
Java – will this implementation be called an anonymous class?
I've seen it many times, but I'm a little confused. Will it be called anonymous class? public class Test { public …… -
Java – access to instances of static methods
I just started using Java. I was looking at the nested class topic and tried something. Suddenly, this happened: class…… -
Android – get notification title
How do I get the title of the notification? This is my code: – from notification service: resultIntent= new Intent(Not…… -
How do I use selenium java to display the selected option from the multi selection drop-down list?
I'm trying to display all the selected options from the multi - choice drop - down list But there is no right way to d…… -
Java – unable to write JSON: not for class org json. Jsonobject found the serializer and did not find the property to create beanserializer
I've set the response to JSON, but I get this @RequestMapping(value = "/customerlist",method = RequestMethod.POST) pub…… -
How to connect to MySQL and PostgreSQL azure databases in Java
Only two new azure services, azure database for MySQL and PostgreSQL, have been released. As a java developer, I want …… -
Java – does it still make sense to avoid creating objects for garbage collection?
For example, in a service adapter, you might: One There is an input data model and an output data model, which may eve…… -
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Java – performance analysis using IntelliJ and debug in visualvm
I want to describe the test application launched by IntelliJ For analysis, I used visual VM I use the parameter - j-do…… -
How does the Java – XOR (^) exchange algorithm work?
This is a way to swap a and B without requiring a third variable I understand whether XOR means "true" or "false" in t…… -
Java – Maven: exclude the “meta-inf / Maven” folder from the jar
I use Maven to build jars When I checked the jar, I saw a maven folder in the meta - inf folder I want it to be exclud…… -
Java – unable to parse the import org. Org springframework. test. context. junit4. SpringRunner
I'm trying to solve this problem from now on But I still haven't solved it I just got out of spring IO downloads a spr……