包含标签：Java 的文章
-
If the variable modified by the thread is marked volatile, why false sharing problem
I've been reading Martin Thompson's article This is an explanation of false sharing http://mechanical-sympathy.blogspo…… -
Enumerations disassembled with javap do not display constructor parameters
When I disassemble enumeration with javap, the implicit constructor parameter of enumeration seems to be missing. I ca…… -
Java – how to format strings using properties in beans
I want to create a string using the format and replace some tags in the format with properties in the bean Is there a …… -
Drag multiple button views in Java
I have an application where I need a button to move the stack (like moving part of a pile of cards from one pile to an…… -
Random chaos probability in Java (or any language)
See English answers > what distribution do you get from this broken random shuffle? 10 for(int i = 0; i < N; i++…… -
Java – hibernate annotations compilation error
When I tried to compile a dto file with hibernate annotations to map to DB, I encountered a strange problem When it fa…… -
Java – we put servlets in Tomcat’s directory structure?
I copied a helloservlet application from the web and put it in the root folder Solution This document can help you htt…… -
Why are there so many versions of Java that are different from c#?
I decided to learn another language and was in the picking stage At present, we are studying Java and C #, but because…… -
NetBeans (Java Swing): setting the window size
It really drives me crazy When I set the appropriate size for my window in design mode, it just ignores this size and …… -
Explanation of Java generic getthis technique
I'm reading about Java genetics. I'm a little confused when I encounter this topic come from: http://www.angelikalange…… -
Java – how do I detect which program plays sound on Windows 7?
I'm trying to write a small background program that will prevent music from playing Winamp. Com when another program p…… -
Java – Jenkins build blocked “option Code: 65002”
My Jenkins can't build our project. This is the log: Jenkins is fully up and running déc. 02,2014 12:34:35 PM Infos hu…… -
How to use java calendar to check whether today is Sunday
I wrote a few lines of code that didn't work Why? Can you explain something? Calendar date = Calendar.getInstance(); …… -
Java – limit jtextpane memory usage
I have an application that continuously receives data on the socket, records the data to a file, and displays the data…… -
Java – how to reduce the impact of visual VM on heap usage?
I'm trying to optimize the memory usage of my application Unfortunately, use - DCOM sun. management. JMX remote runs m…… -
ORM’s fuelphp update resulted in “rather than” sporadic “
I am using PHP 5.4 And I got very strange behavior using the fuelphp ORM save and update function I'm trying to save s…… -
This is in Java – the thread “main” Java Exception in lang.stackoverflowerror
Why do I receive a stackoverflow error? My class – public class Tester { int id; Tester(int id){ this.id = id; }…… -
Java – collections. Java used in JDK 1.5 An alternative to newsetfrommap?
I want to use this "collections. Newsetfrommap()" method in JDK 1.5, which does not support it protected Set<String…… -
Java – how to configure jcombobox not to select the first element when it is created?
Question: @ h_ 403_ 2 @ update: DefaultCombo@R_754_2419@Model model = new DefaultCombo@R_754_2419@Model(); model.s…… -
Are there two identical keywords in Java?
Because we use the "default" keyword as an access specifier, and it can be used in switch statements for completely di…… -
java – com. sun. mail. smtp. SMTPSendFailedException：530 5.7. 0 must first issue the starttls command
I am creating an application 2.2 1 and try adding an email tool to it To this end, I have been in my build Dependency …… -
The Java – quartz job vs. thread executes a task immediately
Assuming I have some units of work to complete, I want to execute asynchronously relative to the rest of my applicatio…… -
Java – what is the difference between Maven archetype mojo and Maven archetype plugin?
Run the output fragment a.txt of the command MVN archetype: generate > 332: remote -> org.apache.maven.archetype…… -
Java – how to allocate memory in Scala
We know that, unlike Java, Scala treats everything as an object For example, we have – object A{ val arg1=1 de…… -
ORM – upgrade GlassFish V2 to JPA 2.0?
I'm trying to use hibernate 3.5 on GlassFish v2 5 and spring hibernate JPA vendoradapter, but when the spring context …… -
Java – how to make the callable task submit to executorservice timeout
I submit the callable task (using submit()) to the implementation of executionservice Occasionally I seem to encounter…… -
Java – xStream serializes null values
Suppose I have class Student { String name; int age; String teacher; } then: public class App1 { public static …… -
Java – use the domain alias account in appengine to send e-mail
I created an App Engine Application owned by x@foo.com. Foo. COM is a Google App account I've also added bar to the Go…… -
Should variables always be declared using interfaces in Java?
People often see the suggestion that variables should be declared with an interface rather than implementing a class F…… -
Java – how do WhatsApp and instant messaging applications run in the background without persistent notifications in Oreo?
What did I learn from stack overflow and Android documentation Unable to create background service for continuous task…… -
Java – deserialization version conflict
My question is, what is a good way to upgrade obsolete objects? For example, suppose you have a class like this: publi…… -
JavaFX – use FX: ID as CSS ID in fxml
It seems that if no ID (CSS) is specified in F XML, the FX: ID value is used by default My previous understanding is t……