Java
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java. math. BigInteger pow (exponential) problem
I did some tests on the pow (index) method Unfortunately, my math skills are not enough to solve the following problem…… -
Java – spring MVC does not record all exceptions
I have spring MVC settings to log exceptions using commons, but I find that some runtime exceptions are not logged Thi…… -
Java – how to compile only changed source files using ant
I'm trying to write an ant build for compiling the source folder, which is the target of my compiled script <target…… -
Java – Alphanumeric regular expression
I want a regular expression in Java, which must contain at least one letter and one number in any position The passwor…… -
Java – how do I initialize graphics G?
I want to display gameover images in Pacman games at the end of my life But I call paintgameoverscreen (graphics g), a…… -
Java – displays tooltips above cells in JTable
When the user enters an incorrect value in it, I need to display a tooltip above (or below:) the cell (see the figure …… -
Java 8 time zone conversion
In Java 8, I want to convert datetime from UTC to ACST (UTC 9:30) Input – > 2014-09-14t17:00:00 00:00 Output – >…… -
What happens when a collection in Java exceeds its capacity?
I have a service that schedules all calls in memory because we don't want to lose data. At the same time, we need this…… -
For Java applications based on play 2.0, can I use groovy templates instead of scala?
I'm the new play 2.0, and it's hard for me to understand the scala template used to create views Solution Yes, there i…… -
Java – parameter org.org not found gradle. api. Project method (Android)
I got a bug. When I tried to compile my project in the studio, I had searched a lot without a real solution Error: (17…… -
Java – explicit and implicit locks
Using locks (Java. Util. Concurrent. Locks. Lock) instead of the keyword synchronized, is the method wait() exactly th…… -
External connection and ORM mapping in Sqlalchemy
I use ORM mapping 0.6 in Sqlalchemy eight I have three tables (a, B and C) and there are no foreign keys between them …… -
Enforce warnings in Java
I want a mechanism to manually throw compile - time warnings I'm using it to mark unfinished code, so I can't forget i…… -
Java – Android – asynchronous network call – response interdependence
I encountered this situation when developing Android applications today. I need to render graphics according to the re…… -
Java – how to use smack in openfire
Hello But I have little guidance on how to use it on openfire servers Does openfire provide a basic user interface, su…… -
Java – a variant of “looking for a common ancestor”
I recently had a telephone interview It encodes the problem as part of the whole process A / B | \ C …… -
Strange behavior of Java argument*
I wrote this lesson: public class ListArg { public static void main(String args[]) { for(int i=0;i<…… -
How to encrypt PDF using Java?
I've been trying to encrypt PDF using Java So far, I can successfully encrypt other file types (. TXT,. PNG, etc.) Whe…… -
Java – in spring data public 2.0 Querydslpredicateexecutor not found in 4
It took me hours to find querydslpredicateexecutor. In the spring data Why do you call it Solution It's in 2 X from qu…… -
Java – spring boot and thymeleaf – remove strict HTML error checking
I use spring boot as an MVC application, and my view technology is thymeleaf One thing I need to do is copy the HTML o…… -
Java EE – securitycontext is not applicable to @ rolesallowed
I am currently using Jersey 2.5 in Tomcat 7 1 create a backend server For security, I use @ rolesallowed, @ permitall …… -
Java – jarentry. Java when the jar file is opened from URL to InputStream Getsize() returns – 1
I tried to read the file from jarinputstream, and the size of the file returned - 1 I am accessing the jar file from t…… -
Java – how do I limit spring component scanning to files only in my war?
I'm using spring's component scan to find beans in my application <context:component-scan base-package="com.myapp"/…… -
Java to C cross compilation
Who knows a good java to C cross compiler? Do they work well? Solution Can you explain why you want to port java code …… -
Java regular expression content between single quotes
I try to write a regular expression in Java to find the contents between single quotes Can someone help me? I've tried…… -
Exchange server – cannot get sender email address using EWS Java API
I am using EWS Java API 1.1 5. I am trying to get the email sender as follows: ItemView view = new ItemView(10); FindI…… -
Java – programming spring MVC controller and JSP for httpdelete
I tried to delete an entity on a page by deleting a link (a href) or a delete button (form) I'm using the delete butto…… -
NoClassDefFoundError uses Scala classes from Java
I don't have Scala experience, so this problem may be basic According to the "person" example in this tutorial, I am u…… -
Java – is this AES encryption secure enough?
I from http://www.ravenblast.com/index.php/blog/android-password-text-encryption/ Having obtained this code, although …… -
Java – find all the leaves through binary search tree iteration
I'm new to trees. I'm trying to create a "leaf iterator" I think it should put No Left and All nodes with the right va…… -
Java – the URL can be accessed using a browser, but it is still a FileNotFoundException with urlconnection
I use httpurlconnection to connect to a website and receive a response code = 404 (http_not_found) However, there is n…… -
Java – disruptor – eventhandlers not called
I was playing with the disruptor framework and found that my event handler was not called This is my setup code: priva……