包含标签：Java 的文章
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Java – can you write a constructor that does nothing?
To use class methods, I need to instantiate a class At present, this class has no constructor (so I want to write it) …… -
Java – how to clear jtextfield when the mouse clicks jtextfield
When the mouse clicks on the text field, I need to make the program clear the text from the text field I've tried some…… -
How to set the timeout with BufferedReader according to urlconnection in Java?
I want to read the content of the URL, but I don't want to "hang" if the URL doesn't respond I have created a Buffered…… -
Java – spring data elasticsearch: multiple indexes with the same document
I used spring data elastic search and everything was normal at first @Document( type = "products",indexName = "empty" …… -
Java – command button in JSF
How to implement the back button as a command button for general work? Unlike the back button, I don't mean the browse…… -
Java – the caller blocks until getfoo () has a value ready?
I have a java thread that exposes properties that other threads want to access: class MyThread extends Thread { pri…… -
Closure in Java – syntax differences between the three main proposals?
Three main schemes for adding closures to the Java language have been proposed: >Bgga (bracha gafter Gosling ah é) …… -
Java – Hibernate: cannot deserialize – invalid stream title
Any ideas about how I can solve this mistake? I am using spring JPA and hibernate Here are the necessary details Entit…… -
Java – how to delete XML version strings from strings
I've read the XML file and used the code given below – String XmlString = ""; String resourcePath=FilePathHelper.get…… -
Pure Java text interface for roguelike games
OK, that sounds like a crazy idea - but I'm interested in emulating the 1980s style roguelike game text interface in p…… -
Java – the custom Jackson httpmessageconverter is no longer applicable to spring 4.2
I'm starting from spring platform version 1.1 3. Release update the application to 2.0 1. Release, which changes the S…… -
What is the range of variables declared in static blocks in Java?
Can variables declared within static blocks be accessed elsewhere? Solution Usually, programmers do not need to declar…… -
Java – the same method in the interface and abstract classes
I came to the situation: public interface Intr { public void m1(); } public abstract class Abs { public void …… -
Operating legacy MDB with Java 8 (access 2.0)
Java 8 no longer supports JDBC - ODBC bridges Is there a way to access old MDB files without a bridge in Java 8? Accor…… -
Java – use JDBC to insert slowly on PostgreSQL
I work on a system that downloads data from a cloud system to a local database (PostgreSQL, mysql,...) Now I have a Po…… -
Java 8 method signature inconsistency
Java 8 gives us a new method. It's really a long signature, like this: static <T,K,U,M extends Map<K,U>> C…… -
Java7 watchservice – how to detect renaming / moving of the actual monitoring directory
I am using watchservice to synchronize data files with the application workbench When I rename / move a monitored dire…… -
Connect mongodb created in mongolab through Java application
I created a mongodb instance in Mongolian mongodb://<dbuser>:<dbpassword>@ds041177.mongolab.com:41177/mycl…… -
. Net – number of CLR and GC instances running on the machine?
I created 2 Net application and running on one machine – how many CLRs and GC will there be? Also: I want to have some…… -
Java – akka: how to schedule retry failures when the delay interval is extended?
What is a good way for an actor to try again and fail, but the time interval between retries is getting longer and lon…… -
Change the default button in Java to make it look better
I tried to imitate the default Windows XP simple calculator When I change the background color of buttons in Java, it …… -
Type safe flattening of nested sets / structures in Java
I want to smooth the collection / structure of some T-class elements nested arbitrarily deep in Java >Only live vie…… -
Java: return class (not an instance)
Can I return a class as a static method? I'll explain I have: public class A { public static void blah(){} } public cl…… -
Java – why is meta-inf called meta-inf?
I'm trying to explain the basic principles of web applications I encountered this problem on Meta - inf and Web - inf …… -
Parsing Facebook signed using java_ Request will return malformed JSON
I'm trying to parse Facebook signed in dopost of java servlet_ request. I use Base64 of Commons - codec - 1.3 to decod…… -
Java – supersymmetric line algorithm?
In a special case, I need to generate supersymmetric lines or rays in the 2D grid in the order from (x0, Y0) to (x1, Y…… -
Java – matching wildcards are strict, but declarations cannot be found for elements
I'm using springsource Tools Suite 3 and trying to intercept Servlet's context In XML <?xml version="1.0" encoding=…… -
Java – spring starts MVC: JSP not found
Problem: I can't reach my point under WEB-INF / JSP of my spring boot web MVC application What did I do? This is my js…… -
How to return a boolean method in Java?
I need help on how to return a boolean method in Java Here is the sample code: public boolean verifyPwd(){ if …… -
Java – Maximum traversal cost in matrix using dynamic programming
Suppose I have an M x n matrix in Java I want to find the maximum traversal cost from the first column to the last col…… -
Java – symmetric key encryption algorithm
I am looking for a secure symmetric key encryption algorithm compatible with JavaScript and Java I've tried to impleme……