Java
-
Use event listeners as Java 8 stream sources
Fast cleaning Can a traditional event listener be refactored into a Java 8 stream so that the listener event becomes a…… -
Java – Model View Presenter and composite view
I try to follow the MVP (especially passive view) pattern in Java Swing UI applications The basic design of the applic…… -
Java – we can create runnable objects as its interfaces
I see a sample code that uses the new runnable (), which is an anonymous inner class Runnable runnable = new Runnable(…… -
Migrating from Jack to native Java 8
I'm trying to use lambda expressions and streams in my android project I use the streamsupport library as a stream and…… -
Java – Show / hide JPopupMenu from JButton; Focuslistener is not working properly?
I need a JButton with an additional drop-down style menu So I took a JPopupMenu and attached it to JButton in the way …… -
Java – how to get hibernate dialect at runtime
In my application, I use hibernate and SQL Server database, so I set <property name="hibernate.dialect" value="org.…… -
Java – strange behavior when downloading HTML using httpurlconnection
In my android Wikipedia reader application, I'm using httpurlconnection to download the HTML of the article. Some user…… -
Java – focus on snippets
I'm looking at an open source project on GitHub. I found the following code line in Java, static byte[] byteArray = ne…… -
How to find errors in the new JavaFX error tracker
The existing JavaFX error link has died How to find errors in the new system? For example How to find bugs Solution As…… -
Eclipse UML plug-in with java code generation
Does anyone know that a good (read: free) eclipse UML plug-in can also do code generation? If not, does anyone know an…… -
If may is complete, convert may to single from another source
I want to build a repository class that returns single < something > This class should first check the cache, wh…… -
RX Java – groupby operator, items from different groups are interleaved
The following codes: Observable .just(0,1,2,3,4,5,6,7,8,9) .doOnNext(item -> System.out.pri…… -
Java – use log4j to create new log files every day
I want to use log4j in my java project. What configuration should I provide log4j.appender.FILE = org.apache.log4j.Dai…… -
Java – why did this method call fail? (generic and wildcard)
I received the following error: 'call(ContainsMonitor)' cannot invoke 'call(? extends webscout.Monitor)' in 'WebScoutC…… -
Java – JNA memory leak
In view of this, C code: void LoadData(char** myVar) { std:: string str("[Really Long String Here]"); unsigned…… -
Java – Protocol buffer: enumeration problem
I have the following Proto file: enum Enum1{ X=0; Y=1; } message SomeClass{ required Enum1 enum1=1; …… -
How to convert a string to a date in Java, regardless of the system format [copy]
See English answers > parse any date in java3 public static String dateToString(String date){ if(date.equals(""…… -
Java – browser authentication via httpurlconnection
At present, I am studying the implementation of tmdb API There is a method called user authentication I have successfu…… -
Java – Apache spark lambda expression – serialization problem
I tried to use a lambda expression in the spark task and threw a "Java. Lang. illegalargumentexception: invalid lambda…… -
JPA – correct join in jpql
I have the following JPA entities: @Entity class UserClient{ @Id @GeneratedValue(strategy = GenerationType.AUT…… -
Java – using PostgreSQL, why doesn’t hibernate / JPA create cascading constraints?
I have an entity: @OneToMany(cascade = CascadeType.ALL,mappedBy = "bar") private Set<Foo> fooSet; An entity foo:…… -
Java – spring batch: different job initiators for different jobs
I have two different jobs (actually more, but assume 2 for simplicity) Each job can run in parallel with another job, …… -
java. security. AccessControlException：access denied(“java.lang.RuntimePermission”“accessClassInPackage.sun.reflect.annotation”)Spring
I use Google application engine and spring security to create a simple spring MVC application When I run my applicatio…… -
Java – Apache POI docx – how to set the page size?
Does anyone know how to change the page size (from letter to A4) for X wpfdocument (docx)? I can't find any printsetup…… -
Java messaging service and Haskell
I wonder if there is any way to receive JMS messages from some providers in the Haskell program, such as ActiveMQ or w…… -
Java – Jackson Deserialize the missing attribute to null optional
Suppose I have such a class: public static class Test { private Optional<String> something; pu…… -
Java – sqlitedatabase ‘does not implement interface’
This error occurs when sqlitedatabase is used as closeable I have a sample project to recreate it: https://github.com/…… -
Java – convert simpledateformat to datetimeformatter
Therefore, when trying to replace some legacy code with simpledateformat and date, use Java time. Datetimeformatter an…… -
Java – types are created safely to be passed to comparator Function instance of comparing()
Suppose I have a method with the following signature: <T,U extends Comparable<? super U>> Comparator<T&…… -
Java – how to build and run birt source code in eclipse Mars
I can get birt source (4.2.2 branch) from here: https://github.com/eclipse/birt/ Use M2e (Maven integration of eclipse…… -
Should the Java – domain model mapper be static?
In many projects I participate in, we often have many classes to map content from one domain model to another For exam…… -
Java – the request method ‘post’ is not supported
According to spring documentation here: They have completed the latter and can be implemented using the following spri……