Java
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Java – how to configure spring boot applications to continue using resteasy?
I have an old web application (pure servlet without spring) and I want to run it as fat jar Solution You can use reste…… -
Is there a standard option or nullable class in Java?
Nullable (c#) has some different meanings, but in any case, option (Scala) and nullable can be used to express the con…… -
Java – understand the last value and value returned by try catch
I have the following code public static void main(String[] args) { System.out.println(returnString()); } private s…… -
What is monad emulation in Java?
I know that in scala and many other functional languages, monad is mainly an interface implementation (for example, us…… -
Java – strange gradle IntelliJ error
When I tried to import the gradle project in IntelliJ idea, the following error occurred: The beginning of the IDE log…… -
Java – resttemplate does not pass the origin header
I'm trying to use spring's resttemplate for cross - source requests Communication is done between two spring boot weba…… -
Java – Hide / filter nodes in JTree?
I have a data object in treemodel, and I want to show only a part of it in JTree - for argument, say leaves and their …… -
Java – Bayesian network in Scala
I am looking for a library to create Bayesian networks and learn and reason in scala (or Java, if there is no better s…… -
Java – how to make Maven build fail on duplicate dependencies?
If I have two identical dependencies in the same POM, I want the build to fail At present, I can use Maven dependency …… -
Java – is there a simple and safe way to convert a printwriter to a printstream?
Is there a simple way to use Java io. The instance of printwriter is converted to Java io. PrintStream？ Solution Firs…… -
What are the methods of drawing 3D trees using Java and OpenGL?
I know how to draw basic objects using jogl or lwjgl to connect to OpenGL What I want is something that can generate s…… -
How to use java to control the LED lights connected to PC through USB / SerialPort, etc? What equipment should I use?
I want to write a program in Java, which can control the LED light to connect to the "thing" connected to the computer…… -
Java – return try block in block vs return block
I have a try statement in a small static method. Is there a best practice for where I should return? try { mightTh…… -
Java – add some days for jodatime instant
I'm trying to write a simple utility method to add an integer day to joda time instant This is my first attempt /** *…… -
Java – disable all reports in Maven’s project info reports plugin
I want to generate custom reports through Maven's site plug-in, but only this custom report, instead of all reports ge…… -
Java – which is better when calling a function: twice or storing the result in a variable?
I doubted this problem many times, but I couldn't find the right solution I'll clear it this time I like something 1. …… -
Java – Android gets the PID of other applications
I want to be able to start an activity or service and get the PID of the process as soon as possible, which will be th…… -
Java – what does “reference implementation” mean?
I'm trying to learn the cachedrowset in Java, and I'm reading some tutorials about it for example Who can please be ki…… -
How do I catch all checked exceptions (in a single block) in Java?
Editor: this problem only involves Java 1.6 (and below) I'm sorry I didn't make it clear in the original post The hier…… -
Java – how can restful web services be better than soap based web services
I have experienced various websites, and the only answer they provide is – restful web services use HTTP's own methods…… -
How to wait for multiple nested asynchronous calls by using rxjava Android?
I'm new to RX Java. This is my situation, >Send request a and get the list < a > back > for each a, send r…… -
Java – add multiple jpprogressbars to the tablecolumn of JTable
I have added multiple jpprogressbars to the tablecolumn of JTable After some calculations, I'm updating all jpprogress…… -
Java – is there a way to expose hibernate entities as restful resources without dto?
I'm developing a simple webapp that exposes the domain model as a restful resource When grouping hibernate entities in…… -
Java – who calls the class initializer method and when?
I know that the new DUP, invocation and astere bytecode patterns will call the instance initialization method < ini…… -
Software testing tool – for Java
Can anyone list five software "software tests" in a java project? I need to learn 5. What do you recommend? Solution &…… -
Groovy equivalent of Java 8 lambda expression
I have only one method that has this java interface@ H_ 419_ 2@// Java Interface public interface AuditorAware { Audit…… -
What is the correct code pattern for completing transactions in Java (exception rollback and successful commit)?
I am looking for a common code pattern to correctly handle transactions that may be abnormal I assume that there is a …… -
Java – what happens when l (long) – = f (float)?
See English answers > floating point arithmetic not producing exact results 7 public class SimplePrint { public st…… -
Java: enumeration and if then else performance
I didn't have real luck. I used Google to get this concise answer rather than my time-consuming evaluation. I thought …… -
Java: look and feel
What happens when I use NetBeans on a Windows machine is that if I run the main java file, I get a different look than…… -
Java – how do I decide which bufferedimage image type to use?
The Java bufferedimage class has a long list of class variables called image types, which can be used as parameters of…… -
How do I synchronize from two processes – atomic writes on one file?
I have two processes. Each process writes big data buffer. I want to control the synchronization of these processes to……