Java
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Java – what is the minimum UNIX permission to run an executable jar file?
If I have a jar, I need to use Java - jar foo Jar runs on UNIX. Does this depend on the read, write, or execute bits? …… -
Concurrent use of Java util. Random contention
Oracle Java documentation says: Could it be the reason for poor performance? Solution Internally, Java util. Random ke…… -
Multithreading – common threadsafe properties
I created this "threadsafe" general property, which I can use between the main thread and the background thread I do t…… -
Java – parsing JSON using gson, objects sometimes contain lists and sometimes objects
I'm using an API that sometimes contains a list of child objects: { 'obj' : { children: [ {id: "1"},{id: "2"} ] } } I …… -
Java – what is the difference between extending abstract classes and non abstract classes?
What is the difference between abstract and non abstract classes when extending derived classes? Both classes do not u…… -
Java – how to serialize the last class that cannot be serialized by a third party (such as Google’s latlng class)?
I use Google's latlng class in V2 Google play service That particular class is final and does not implement Java io. S…… -
Java – how to handle internationalization “your input” XYZ is very good! “
I want to know what is the right way to handle internationalized statements and add runtime data for example Double qu…… -
Why does my algorithm become faster after executing several times? (JAVA)
I have a Sudoku solution algorithm, and my goal is to do it as soon as possible To test the algorithm, I run it severa…… -
Java – unable to automatically connect field: private org springframework. security. core. userdetails. UserDetailsService
I'm a new spring, so I've been on the safe side I have passed a fine comb through my code, unable to determine the pro…… -
java. Lang. linkageerror: Loader constraint violation in Grails project
I have built a Grails project with POI (including POI - 3.7 and poi - OOXML - 3.7) I've been working on the buildconfi…… -
Java – alpha beta mobile sort
I have an alpha- β The basic implementation of pruning, but I don't know how to improve the moving order I've seen tha…… -
What happens when a subclass does not define a constructor in Java?
I have a few things I want to know First, if you don't have a constructor: class NoCons { int x; } When I do the new n…… -
javax. servlet. HttpServletRequest. Getcontentlength() returns only int
In order to handle the large request body in HTTP post or put, it depends on HttpServletRequest Getcontentlength () is…… -
Java – how to automatically connect resttemplate using annotations
When I try to automatically connect to spring resttemplate, I receive the following error: The nested exception is org…… -
Java – connection using connectionpooldatasource
Connect to the database I need I intend to use the connectionpooldatasource class But how to use this instance to set …… -
How do I create an ArrayList from array in PowerShell?
I have a list of files in the array I want to enumerate these files and delete specific files from them Obviously, I c…… -
Exception in thread “main” Java security. Invalidkeyexception: illegal key size or default parameter
The following code throws this error message: Exception in thread "main" Java security. Invalidkeyexception: illegal k…… -
Java – Jface tableviewer vs treeview – performance
Has anyone noticed that there is a huge performance difference between treeviewer and tableviewer (treeviewer is much …… -
Event listeners in Java
I've been using the event listener in AS3, but it doesn't seem to be in Java (except graphical components) Amazing The…… -
Generate a range of random even numbers in Java
The posts I read almost explained this problem, but they all use integer values. To be honest, I don't fully understan…… -
Java – parsing anonymous classes does not implement abstract methods
I'm trying to retrieve objects from parse cloud storage from button click events in my main activity, which is from pa…… -
How to recompile and reload java source code when “lein repl” runs?
I have a clojure project and I'm using leiningen I'm also using tools Namespace reloads clojure code when repl is run …… -
Java – can the final method be emulated in powermockito in a non final concrete class?
Suppose I have a non - Final concrete class, and the last method is as follows public class ABC { public final Strin…… -
How to delete records (strings) Java and MySQL
I successfully deleted an integer, but when I tried to change it to string, it would say Here is my code: private void…… -
How do I build Java typed objects at runtime from generic type definitions and runtime type parameters?
Assume universal type declaration (Java) class Foo<T> { public T bar; } At runtime, how do I instantiate a t…… -
Java – how to merge long strings into jlabel
As the title shows: I need to install jlabel into JFrame, but the text in jlabel is too long, so I need to add some li…… -
Java – spring MVC cross domain validation: code smell?
Is this a taste of code or the best way to implement cross field verification in spring forms? @FieldrequiredIf.List({…… -
Java – find out if one circle is inside another
I'm in a bit of trouble. I have a task asking me to find a second circle, whether it overlaps, inside or in the second…… -
Java class type
I have a piece of valid code. I want to ask what happened? Class<?> normalFormClass = null; – - add – – The wild…… -
Java – code complexity analysis tool goes beyond loop complexity
Although loop complexity is a valuable indicator, I tend to think of it as a poor tool for identifying code that is di…… -
Java – how to generate RSA keypair using password encrypted private key?
I want to generate the private key pkcs8 format for key encryption. I try to use this Code: String password = "123456"…… -
Java – operator priority issues cause “error: unexpected type”
Due to many operator priority problems recently, I began to use some code and came up with this: int x = someNumber; i……