Recent Posts
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Java – OpenSSL decryption returns false
I try to encrypt the password in Java and decrypt it in PHP using opensll I got nothing but Boole This is my java code…… -
Java – why objectoutputstream Readobject() accesses MyClass readObject()
I'm reading the basics of Java io. I see that in order to use the custom writeobject function in a class, it must be d…… -
Java – debug in GWT 2.7 super development mode. Is stacktrace missing?
I just got from GWT 2.5 1 migrate to 2.7 and use superdev mode for the first time com.google.gwt.event.shared.Umbrella…… -
Configure Java HBS to find the location of some templates
In short, Java HBS (jkack. Handlebars) is looking for some templates in a directory completely different from the pare…… -
Java – Tomcat uses defaultservlet to get static content in external directory
I have a simple web application that allows users to upload and access files When users access uploaded files, the ser…… -
Java – generate name arrangement and database
Using "generating all permutations of a given string" as a reference, I try to have my program (when a name field is d…… -
Java – is there any way to restore Youtube API videos?
I'm using the Youtube API to write a simple application for Android – I want to realize the automatic recovery state o…… -
RX Java – with observable Just() and rxjava flatmap with one parameter
I'm using RX Java, and I have a question to understand flatmap Observable.just(1) .flatMap( …… -
About classes extended from base classes (Java)
I am a beginner of Java, trying to write a party task system for the game I am writing. I have a few questions I want …… -
Java – object cache data structure with “object expiration”
Which data structure in Java is best suited for in memory object caching, where objects have a separate expiration tim…… -
Java – you want to use transactions in Hibernate queries to delete existing documents from folders and database values in tables
I have a file upload application After uploading the file, create a new document path and save the document in the fil…… -
Implementation of redblacktree insertion in Java
I am trying to implement the CLRs pseudo code of red black tree NullPointerException is thrown when I try to run the p…… -
JavaFX is relative
Everything is great to work on this desktop application There were some problems with her and there, but each one was …… -
Disable the close button in the Java Jface dialog box?
How to disable the close button in the Java Jface dialog box (if possible, make it disappear completely)? Solution For…… -
Java – the swing button does not react immediately! How can I change?
I built a form with the visual editor of NetBeans When I press one of the buttons, it should do the following: >Set…… -
Java – cannot add to ArrayList “misplaced construct (s)”
I have a simple ArrayList setting, but I can't seem to add objects import java.util.ArrayList; public class Inventor…… -
Java – relative file path with “user. Dir” system attribute
I'm trying to read a local file in a web application on the server When testing JBoss outside deployment, the file pat…… -
How to solve the exception in thread “main” Java Lang.nullpointerexception error
See English answers > what is a NullPointerException, and how do I fix it? 12 java.lang.NullPointerException at two…… -
Why can’t I programmatically close the dialog on JavaFX?
This code example shows but does not turn off JavaFX on JavaFX scene. control. Dialog： Dialog<Void> dialog = ne…… -
Is it a good habit to use Java 8 for Android development?
I read the instructions for Android development using java 8 from this answer and (orfjack / retroambda) I wonder if i…… -
java. io. Is filewriter designed for one-time use only?
I'm using Java io. Filewriter builds a program that keeps writing to the same file During runtime, whenever I need to …… -
Is java – spring too complex for JDBC operations?
I've just seen spring's JDBC framework - it looks like a learning curve - and I still can't find the latest quick star…… -
Java – eofexception when reading files using objectinputstream
I have basically encountered a similar problem: eofexception in Java when reading objectinputstream, but I can't find …… -
Java – how do I prevent eclipse from moving my line comments after comments?
I set some comments on the class and comment on the same line as the comments, for example: @SampleAnnotation // sampl…… -
Java – InputStream closed by imageio
I encountered a very strange problem with imageio Some objects in my java program have an image I use the static metho…… -
Java – check if string x is equal to any string in string []
If the string entered by the user is equal to any string in the string array, I try to set a Boolean value of true I i…… -
Get all users and roles in Java webapp
Question: >Is there a general role for user and concept servlet containers? > If so, is there a container indepe…… -
Use lambda to provide stack based context (for example, the path of a file operation)
I have a subtle way (which may have been implemented and discussed) to do the same in groovy (from groovy documentatio…… -
Java – Google server authentication code failed login
So I managed to use the new Google login to work GoogleSignInOptions gso = new GoogleSignInOptions.Builder(GoogleSignI…… -
Java – ora-01733 (virtual columns are not allowed here) after database update
One of our databases has been updated from Oracle 9i to 11g Since then, one of our programs has repeatedly encountered…… -
Java – use Multimap instead of map to send parameters of rest assured call
I'm declaring a variable static Multimap<String,Object> multiList = ArrayListMultimap.create(); And add image mu…… -
How to convert XML to JSON in Java and avoid the parser trying to parse strings into numbers
I'm using org json. XML library to parse XML into JSON http://www.json.org/javadoc/org/json/XML.html In my XML documen……