Java
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Java – Maven incremental build
We currently have a large Maven 2 project, which is a collection of many separate projects with complex dependencies, …… -
Java – overwrite paint or paintcomponent when you need to restore the original state of the drawing
I realized that most of the Java code covered paint or paintcomponent, and most of them did not restore the old state …… -
Java – double quotes in regular expressions
How do I use regular expressions to get strings in double quotes? I have the following string: I want to put the strin…… -
Java – hibernate on Oracle: mapping string attributes to CLOB columns
Warning: please see my own answer below The problem is caused by the addition of 10.2 Caused by an old Oracle driver i…… -
How to override the toString method of ArrayList in Java?
I want to use the toString () method for ArrayList in Java However, even if I add such toString () to the class contai…… -
Compiler construction – will different JDK updates produce different Java bytecodes?
Scenario: I have a project whose source compliance level is specified as 1.5 Now I compile this project with two diffe…… -
How are enumerations internally represented in Java?
Java enumerations are classes They are compiled into classes How does the following example compile? What is "class"? …… -
Can Java applications detect whether the debugger is attached?
I know that the (JVM) startup option lets the JVM wait until the debugger is connected - that's not what I mean Can I …… -
Java – jax-rs Jackson Jason provider date format problem
Wrt found the following problems: Jersey + Jackson JSON date format serialization – how to change the format or use cu…… -
Java – spring and Hibernate suddenly set transactions to read-only
We have one in JBoss 4.2 3, using spring 2.5 2 and Hibernate 3.2 6.ga. This is running on Linux jee01 2.6 16.60-0.54. …… -
Java – Convert integer list to int array
See English answers > how to convert list < integer > to int [] in Java? 17 Solution I believe you can find s…… -
Java – break down work into multiple threads
I have the following problems: for performance reasons, I need to split work across multiple threads, but I don't know…… -
Java – set request prioritization
I am using the volley Library in Android to set the priority of my request I can't find out how to prioritize requests…… -
Tab navigation in JavaFX textarea
How do I click tab in textarea to navigate to the next control? I can add a listener to the CATH de key press event, b…… -
Java – how to set JFrame as the parent of jdialog
I cannot set the frame as the owner of the dialog box Usually, when I extend the jdialog class to create a dialog box,…… -
Java simple server monitoring
I'm trying to find a solution that allows me to monitor the resource consumption of the server Best of all, the metric…… -
Java – does integer auto boxing and auto boxing provide performance problems?
We are using X for some iterations and other operations; Where x is an integer, not int Operations may be repeated in …… -
Java – list of all system properties supported by JRE
Yesterday I added a Java - djsse. Java in JDK 6u30 System attribute with enableccprotection = false I didn't know unti…… -
java – Hibernate. How does initialize () work
I know that we use lazily to load objects / collections outside the session. We do hibernate Initialize (object obj) s…… -
Java – the fastest way to insert a very large number of records into a table in SQL
The problem is that we insert a large number of records (more than a million) into a single table from a Java applicat…… -
Kotlin code compiled as jar for Java projects?
I wrote a Java library in kotlin, and I want to compile it into a jar that can be used by Java and kotlin applications…… -
Why do we need to use shift operators in Java?
>What is the purpose of using shift operators instead of division and multiplication? Solution Segmentation and mul…… -
Check is not empty in Java
Imagine that I generated an XML generated entity in Java, which contains some data I need <Car> <Engine>…… -
Java – inject EJB into eclipse link sessioncustomizer to provide Oracle schema name
In the Java EE 6 application running on GlassFish (3.1.2.2b5), suppose you have a configurationservice, which will rea…… -
How to control the width of jtextfields in Java swing?
I try to have several jtextfields on a single line, but I don't want them to have the same width How do I control the …… -
jsf – FacesContext. Getcurrentinstance() returns null in the runnable class
I tried to call FacesContext. in the run () method of the Runnable class. Getcurrentinstance() to get facescontext, bu…… -
Java-8 – why doesn’t map extend functions?
While using the new Java 8 stream API, I want to know why not: public interface Map<K,V> extends Function<K,V…… -
Java – how do I use the onejar Maven plug-in to set additional class path entries in the manifest?
Is there any way to use the onejar Maven plugin to add arbitrary classpath entries to the jar file manifest? I found t…… -
Multithreading – lockless memory reclamation with dangerous pointers
Hazard pointers is a technique for safely reclaiming memory without garbage collection and lock - free code The idea i…… -
Java – database design, without passing JDBC
I have a database design problem and I am facing one of my projects I try to implement a service, and part of this ser…… -
Java – the best way to implement a large state machine?
Basically, I have a state machine that controls the attack of game characters, and its time is based on the length of ……