Java
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Java – wait for multiple swingworkers
Consider the following code snippet: import java.awt.FlowLayout; import java.awt.event.ActionEvent; import java.awt.ev…… -
Is the swing repeat() method other than EDT in Java 7 still safe to use?
I know that even using swing's threading model, it was once considered safe to call repaint () and other methods from …… -
Java – adding to HashMap takes a long time
In my java program, I have stopped for a few lines, which takes too much time (about 20 seconds), which seems strange …… -
Processing asynchronous signals in multithreaded programs
The Linux programming interface book mentions a method of processing asynchronous signals in multithreaded programs: T…… -
Java – Jersey serialization / deserialization problem: abstract types can only be instantiated with other type information
I'm serializing and deserializing my jersey I used Jersey to create a rest channel on Weblogic I have result objects t…… -
Java – the correct way to automatically connect hibernate session in spring transaction JUnit test
This problem is similar to the previous one I tried to @ autowire a hibernate session in my spring JUnit transaction t…… -
Java – how do I update a map or list on the AWS dynamodb documentation API?
The new AWS dynamodb document API allows two new data types to directly correspond to the basic JSON representation: M…… -
Java – parses a 20 GB input file into an ArrayList
I need to sort 20 GB files (composed of random numbers) in ascending order, but I don't know which technology to use I…… -
Java – how to make izpack installer Jar file Exe file
I use izpack to install an installer It's here Jar file I think so Exe file for distribution What should I do? A simpl…… -
How to use list properties in Google App Engine data store in Java?
Objects placed in the data store will have a set of tags public class Model { List<String> tagList ... …… -
Java – spring property placeholders do not work properly
I'm in stackoverflow I've seen similar problems on. Com, but no solution is helpful to me #possible values: dev test p…… -
Why are Java and C # different in oops?
1) Why are the following codes different C#： class Base { public void foo() { System.Console.WriteLine("base…… -
Java – modern for loop for raw arrays
Is there a performance difference between for loops on the original array? Undertake: double[] doubleArray = new doubl…… -
Java – naming convention for akka messages and actors
I am currently making a very large Java application based on akka. I have encountered several problems and I am not fi…… -
Java – ignore ‘file Result of mkdirs() ‘
This is mydir My code in mkdirs(); This code shows that I ignored file Result warning for mkdirs() I tried to fix this…… -
Java – how to add @ serialVersionUID to an anonymous class?
I want to translate the following code from Java to scala: Foo foo = new Foo() { private static final long serialVersi…… -
Java – how can an EJB client not find an EJB server without a URL?
I'm new to Java EE At present, I am passing the Java EE 6 tutorial Volume 1 (basic concept beta) of Sun Microsystems I…… -
Java – wildfly 8, remote debugging applications
I need to debug y nodes remotely in JBoss 8 / wildly cluster (running two nodes on one machine) For this, in our maste…… -
Java – Hibernate: how to use cascading in annotations?
How to use cascading and annotation in Hibernate? But I doubt: I have this situation: public class Package(){ @OneTo…… -
Java synchronization method with expensive parameters
I have a synchronization method that seems to "use" synchronization significantly longer than it should be It looks li…… -
Java – Solr cannot load MySQL JDBC Driver
I use Solr 4.6 on Mac 1. I try to find out how to load data from MySQL using data import But I couldn't load the jdbc …… -
Java – operation is not allowed after the resultset is closed
Well, he has been trying to solve this problem for the past two days Statement statement = con.createStatement(); …… -
Java – how to disable closing the keyboard if you press done on the keyboard
When the user presses "finish" on the soft keyboard, the keyboard closes I want it to be turned off only when certain …… -
How to use CSS in JavaFX to animate?
I want to change the style of the node by changing its style class Button button = new Button(); button.getStyleClass(…… -
Mix of slider and progress bar JavaFX
I want to click ProgressBar on the slider And learn a certain proportion of the track I need to create progress in a m…… -
Java, generics don’t work
In my opinion, it should work, but that's not the case Why? Source code: package javaapplication1; import java.util.*…… -
Java – difference between bounded type parameters and upper bound wildcards
I know a similar question has been released, although I think I have some differences Suppose you have two methods: //…… -
Java – eclipse Juno – why is there no warning to use uncommented private fields?
In previous versions of eclipse, this worked correctly Error / warning I checked "unused private fields" – > warnin…… -
Date timezone conversion in Java?
The most direct code I can think of is: SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); String in…… -
How to use Java library. Add rxtxserial to path?
See English answer > java lang.UnsatisfiedLinkError: no rxtxSerial in java. library. path11 java.lang.UnsatisfiedLi…… -
Monitoring Java Web applications – is JMX the right choice?
We have a Java Web application. We want to set up some basic monitoring in order to expand this monitoring in the futu…… -
The Java decompiler has the saved line number of the actual physical location
Many ide debuggers match physical line numbers http://java.decompiler.free.fr/ Not one Solution I have released a supp……