Java
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Java – synchronization block within synchronization block
Can I include a synchronization block in another object to synchronize another object? Example: synchronized(myObjetc1…… -
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…… -
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 – directly from completable future Thenaccept return value
I tried to return a list from completable future as follows: public List<Provider> get() { CompletableFuture…… -
Think in Java version 4 – what is classname this. method()
Reading "thinking in Java 4th Edition", I found this example in Chapter 14: public class CoffeeGenerator implements Ge…… -
Java – unable to create a new session Error in appium code
Unable to create new session (original error: a new session is requested, but one of them is in progress) this error i…… -
Java – thread safe denies atomicboolean get() as a condition in the while loop
Suppose I have the following code: AtomicBoolean condition; condition = new AtomicBoolean(false); (...) while(!conditi…… -
How do I change the old for loop to intstream?
This for loop traverses the int array It changes the value of (index - 1) to the value of the current index So the res…… -
Java – use objects in your own constructors
Is it possible (or wise) to use an object in its own constructor? (sorry for the noob problem of improper production) …… -
Mutli thread in Java
When I'm at @ L_ 502_ There is a synchronized method in 0 @ and if multiple threads (such as 10 threads) try to access…… -
Java – use JUnit test in Android studio of firebase
I want to write unit tests for this class in Android studio, but due to the use of firebase, I have a problem creating…… -
In Java: what happens if I change a key in a HashMap to equal another key?
See English answers > changing an object which is used as a map key But what if I change the existing key to be equ…… -
Java – how do I delete elements from a hash table using their values instead of keys?
I'm a novice in hash table. I just understand its basic operation Hashtable<Integer,String> ht = new Hashtable&l…… -
Side effects in Java methods
This may be a trivial question, but I need to clarify public Example someMethod() { // ... different lines here …… -
Java – resteasy002142: multiple resource method matching requests
I'm following two completely different URLs, and I can't explain why: RESTEASY002142: Multiple resource methods m…… -
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 – 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 – how do I capture connection events in my websocket server using spring 4?
I use spring 4, stomp and sock JS for simple web socket communication, follow this https://github.com/rstoyanchev/spri…… -
Java – use 𞓜 to compress the basic code and operators with strings
I am a novice in Java programming I can't find any information about using | operators and strings I wonder if there i…… -
Java – populating the spinner with data from the SQLite database – application crash
I'm trying to load data (specific columns in the table) into the spinner Every time I save data in allgemein and try t…… -
Has the allobjects () method in Java – realm been deprecated?
I'm trying to display list items in listview using realm offline database I followed some tutorials and he used the al…… -
Java – converts long to “byte array ed” text without heap allocation
I want to convert the (positive) original long into byte [] For example, a simple method is: 123 = > "123" = > […… -
Java – kotlin native is equivalent to system exit(-1)
In the following kotlin / JVM program, system Exit (- 1) stop program execution with error exit code: fun main(args: A…… -
Multithreading – how to control multithreading synchronization in Perl
I have an array of [A-Z, A-Z] ASCII numbers, as follows: my @ alphabet = (65.. 90,97.. 122); So the main thread functi…… -
Java – the word reversion of a string
I want to reverse the words in the string I try to do it like this: public String reverseWords(String str) { Strin…… -
Java – Android: cannot call private Android without args net. Uri()
I use gson to save the ArrayList of the custom model to the shared preferences Storage Code: ArrayList<DownloadProg…… -
java android new String
I have to convert a byte array to a string So I use this function: public static String byteToString(byte[] bytes) { …… -
Types – how to specify the element type in the vector of SbCl (or common LISP)?
I tried in SbCl 1.1 14, but it seems that type checking ignores the declaration of the vector element (defun test (vec…… -
Java – how to interpret a simple setter as a consumer?
First, please wait patiently Most of the time I work in scala (sometimes only on the JVM side) or other languages, so …… -
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…… -
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 – replacing stream collection in kotlin native solutions
I am currently using the kotlin function to extract a map from a JSON structure with key value pairs The JSON used to ……