Java
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Java – load spring boot properties from JSON file
Is it possible to start from The JSON file loads the spring boot configuration instead of Yaml or properties？ From lo…… -
Java – why don’t these semicolons produce errors?
See English answer > what is the use of an empty statement (not for loop) in Java? [closed] 6 public class Main{ …… -
Java – returns only the last element in the ArrayList
I've been teaching myself Java. I've always insisted on a problem. No matter what I do, it seems that I can't solve it…… -
Java Runtime. getRuntime(). Freememory() problem
I searched and saw some threads, but none solved the specific problem I encountered I tried to use runtime getRuntime(…… -
Java – how do I wait for the alert box to perform an action in selenium?
I press the Cancel button than check some text according to my code In chrome and Firefox, it works normally, but in i…… -
Java – how to create a listview with multiple views
My question is – how to create a custom list view instead of just repeating a custom view, but like in instagram or ot…… -
Java – insert spaces after commas, periods, and other punctuation marks
In Java, the best way to fix missing spaces after some punctuation is: ,. ; : ? ! For example: String example = "This …… -
Understanding Java executorservice
I'm trying to learn how to use Java's executorservice, I am reading the following discussion java thread simple queue …… -
How to create a general placeholder function in Java and use the function as a parameter later?
I don't know how to express my question, but it's simple I want to create a generic placeholder function that takes a …… -
Java – what is the difference between these generic statements?
See the English answer > is this raw type assignment type safe? List = new ArrayList(); 1 Map<String,Intege…… -
Java generics – a comparable interface
In the following code, the comparable interface is used to ensure that X and y should have the same reference type, bu…… -
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 – 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…… -
Java – spring data JPA repo, why do you need interface services and service implementations
I've just started developing spring boot. JPA using spring data JPA When I generate a model from a table, I create a m…… -
Java – “do not allow exceptions to be caught” checkstyle Report
I'm generating a checkstyle report embedded in Maven site, and one of the problems is that it indicates that exception…… -
Java – removes the space between the toolbar and tabrayout
I have an appbarlayout with tablayout, which is located in the activity with toolbar But there is a space between the …… -
Java – to check whether a string can be parsed to an integer?
I want to check a string I pass to integer Valueof (string s) a valid string to parse If one is not parsed, I need to …… -
Assign the return value to the new variable (Java)
It's been a while since I did some java coding I need to build an application for the business that needs to be automa…… -
Java – use groupingby for nested maps, but collect different types of objects
So I have the code for this "work" (replace some names for simplicity): Map<String,Map<String,ImmutableList<S…… -
Using java to convert children to parent problems
class Parent { class Parent { int i = 60; } class Child extends Parent { int i = 70; } class Main { pub…… -
Java – should hibernate use a unique sequence for each table?
I have several entities using automatic key generation strategies with hibernate and Postgres @Id @GeneratedValue(stra…… -
Neo4j – Java heap space Wrong query or setting?
I have neo4j a problem introduce I have to build an application that stores bus / train routes This is my architecture…… -
Java – after successful matching, continue to match the scala switch of the next case
How to execute another case block after executing one case block in a Scala switch statement (in Java: no interruption…… -
Haskell pattern matching vector
I'm following an online tutorial on Haskell We define a function to add a two-dimensional vector, represented by tuple…… -
Java – @ before / @ beforeclass doesn’t seem to work, and the object represents null
I was learning JUnit and had a problem at the beginning At the beginning, I want to initialize the object that will be…… -
Java 8 option list collection list compilation error
I can't understand the difference Stream<Optional<Integer>> optionalStream = Stream.of( Op…… -
Accessing private variables through static methods in Java
Suppose I have the following Java classes: public class A { private int x; public A(int x){ this.x…… -
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…… -
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…… -
From the switch inside do, but there is no Boolean value. Is this possible? Java
So the code is about the restriction of giving input in do while Maybe it may not have Booleans, or it may change or a…… -
Java – (custom) exception of restauthenticationprocessingfilter ordering
I tried to add rest authentication to my application with a token public class RestAuthenticationProcessingFilter exte…… -
Java – use spring batch to parse dates from files to localdatetime
I'm trying to read a CSV file with a date using spring batch, but I can't resolve the date to a localdatetime object: ……