Java
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Java – JPA: extending persistence context and separating entities
There seem to be two modes to implement business transactions across multiple HTTP requests and jpas: >Entity manag…… -
Java – populate the HashMap with entries in the properties file
I want to use the properties class to populate the HashMap I want to load The entries in the propeties file, and then …… -
Java – NoClassDefFoundError does not have any class name
I tried to run Java tasks from ants I'm trying to run the "org. Apache. Tools. Ant. Launch. Launcher" class I keep get…… -
Java – how to get a heap dump from running Tomcat 7
I tried this get a heapdump on JVM from Tomcat 6 Solution The easiest way to get a heap dump is to use jmap Execute th…… -
Java – how do I get a fully qualified class name in eclipse?
Is there a quick way to click on a Java class in eclipse and get its fully qualified name, or copy it to the clipboard…… -
Java – GlassFish security – jdbcrealm: how to configure login using SHA-256 summary
I use JDBC realm to protect my GlassFish v3 0.1 b22. It is set to use the user table in my database for authentication…… -
Is there such a thing in every loop in Java?
If there is such a thing, I will imagine that the grammar is the same while(Integer item : group<Integer>; item …… -
Java – why do I get “unable to parse symbols”?
I haven't encountered any difficulties before. I have imported this project before I'm not sure what has changed I cli…… -
JavaFX: use JavaFX to embed browsers different from WebView
I am using a JavaFX application that contains several HTML, CSS, and JS files rendered by an internal WebKit browser N…… -
Is there such a thing in every loop in Java?
If there is such a thing, I will imagine that the grammar is the same while(Integer item : group<Integer>; item …… -
Java – how does spring JDBC temaplate send the full batch size to the DB2 server at one time?
Although JDBC template Batchupdate (...) is running. I can see that the DB row count increases gradually (by running c…… -
AOP – how to exclude methods from AspectJ
I'm trying to use AspectJ to exclude several methods from log files (I only use spring and load time weaving) Is there…… -
Java – a best practice for sharing web layer code (controllers and JSPS) between similar web applications
I'm trying to rewrite some aging web applications There are two very, very similar, but I didn't share the code today.…… -
Java – where can I get these exercises to solve it?
Recently, I successfully did a Java programming exercise sent by the recruitment company. The problem statement is lik…… -
Java – stateless session bean with instance variables
I have a stateless session bean that contains a public method, several private methods, and some instance level variab…… -
Java generates excel instance code through Apache poi
First, jar Maven add dependency At first, I thought it was POI, and then I directly added the dependence of POI. Who k…… -
Java httpurlconnection sends file and string information
Java httpurlconnection sends file and string information Transfer parameters in the form of documents Pass parameters …… -
Thread pool principle of Java concurrency thread pool (2)_ Power node Java college sorting
Thread pool example Before analyzing thread pools, let's look at a simple thread pool example. Operation results: The …… -
Example of Java using socket communication to transfer files
This article gives an example of how Java uses socket communication to transfer files. Share with you for your referen…… -
Java Swing imitation cool dog music player
Today, I'd like to introduce a music player developed with Java swing, high imitation cool dog music player. The compl…… -
Fair lock of Java concurrency (1)_ Power node Java college sorting
@H_ 404_ 1 @ basic concepts In this chapter, we will explain the principle of "thread obtains fair lock"; Before you e…… -
Java uses HttpSessionListener and filter in jetty9
Java uses HttpSessionListener and filter in jetty9 HttpSessionListener Called when a session is created or destroyed E…… -
Atomiclong atomic class of Java concurrency_ Power node Java college sorting
Atomiclong introduction and function list Atomiclong is used to perform atomic operations on long shaping. In a 32-bit…… -
Atomicreference atomic class of Java concurrency_ Power node Java college sorting
Atomicreference introduction and function list Atomicreference is used to perform atomic operations on "objects". Atom…… -
Course design of java music player
1、 Curriculum design purpose 1. Programming music playing software to realize the function of music playing. 2. Culti…… -
Teach you to easily make java video player
preface Skip the nonsense and look directly at the text Java went into the pit because of its cross platform advantage…… -
Java to create a simple video player
Recently, there was a multimedia assignment that required visual c + + and OpenCV to write a simple video player, whic…… -
Explain in detail the loading order of inheritance relationship classes in Java
Explain in detail the loading order of inheritance relationship classes in Java Example code: Operation results: Accor…… -
Concurrentskiplistset of Java concurrency set_ Power node Java college sorting
Introduction to concurrentskiplistset Concurrentskiplistset is a thread safe and orderly collection, which is suitable…… -
Goodbye to Java 8’s new features, permgen_ Power node Java college sorting
Many developers have seen the problem of "Java. Lang. outofmemoryerror: permgen space" in their systems. This is often…… -
Using java to make a simple music player
This paper mainly uses the swing technology in Java and the API in jmfjar to share the specific implementation code of…… -
Method example of realizing single thread communication with java socket
This paper describes the method of realizing single thread communication with java socket. Share with you for your ref……