Java
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Java – gradle dependencies are not recognized in IntelliJ
I am using gradle as a dependency management system or any other way to develop spring boot application After adding s…… -
Java – what is an interface based framework?
I'm reading effective Java and reading static factory methods to create objects Chapter 2, item 1 Do you have an advan…… -
Java – how to use reflection to call methods with parameters?
This is my lesson: public class A{ private void doIt(int[] X,int[] Y){ //change the values in X and Y }…… -
Java – capitalize the first word in a string with multiple sentences
For example: String s = "this is a.line. Over" Should come out "This is a.line is. Over" I thought about using string …… -
Java – Jackson deserializes JSON with timestamp fields
I have this string: { "debug":"false","switchTime":"2017-04-12 17:04:42.896026" } I try to get objects in this way:…… -
Java – can I convert relax ng to XSD?
See topic: if so, my second question is, how? I tried to use the Trang Java library and nothing happened:（ Solution T…… -
Java – why is “t instanceof T” not allowed, where t is a type parameter and t is a variable?
Eclipse indicates that the instanceof operation is not allowed for the type parameter due to the generic eraser I agre…… -
Is there a zero time start (no recompilation) switchable condition flag in Java?
I'm looking for a way to provide the fastest possible on / off flag for if conditions (I mean zero time - compile / cl…… -
How to convert an input stream to a Java object
ByteArrayOutputStream baos = new ByteArrayOutputStream(); ByteArrayOutputStream baos = new ByteArrayOutputStream(); Ob…… -
Java – when to use runtime Maxmemory() and totalmemory() [copy]
See English answers > What are runtime getRuntime(). totalMemory() and freeMemory()? 6 What are the typical use cas…… -
Java – call the ColdFusion function on another server?
I have a Java class that must be run, and my current web host (share) will not allow Java I need to host it on another…… -
Java – dynamodb global secondary index with exclusive startup key
Can I specify an exclusive startup key when querying dynamodb table through global secondary index? I am using AWS Jav…… -
Java – JSP custom tag: missing DTD / XML schema
I wrote my JSP custom tag with the following TLD: <?xml version="1.0" encoding="UTF-8"?> <taglib xsi:schema…… -
Java – what is the best way to “Ping” a database through JDBC?
I tried to determine the best way to Ping the database through JDBC "Best" I mean fast and low cost For example, I hav…… -
Java – what is the difference between JPA project and EJB project in eclipse?
Which one is used? When I want JSF stateless bean JPA entity application, do I need to integrate EJB project and dynam…… -
Java – how to exclude object properties in GWT from serialization?
Is there any way to exclude the original and object properties in serializable objects from GWT serialization? public …… -
Multithreading – is it possible to execute a single threaded program on multiple CPU cores at the same time?
When I run a single threaded program I wrote on four core Intel, I can see in the windows task manager that all four c…… -
Use java to delete all files with extensions
I'm (relatively) new to Java and I'm trying to implement a to run a command list Jar, at the command prompt of Windows…… -
Java – how to place log files in the user’s home directory in a portable manner in logback?
I want to put the log file in the user's home directory How do I do it in a portable way, i.e. working on windows, Lin…… -
How do I get the difference between two Java maps?
I have two maps as follows: Map<String,Record> sourceRecords; Map<String,Record> targetRecords; I want eve…… -
Java – what is the difference between jars and packages?
What is the difference between jar files and packages? Solution A package is a method of logically organizing classes …… -
Basic problems of Java
public static void main( String arg[] ) public static void main( String arg[] ) In the above statement, can I use int …… -
Java linked list that supports rapid deletion of any node?
java. util. LinkedList does not allow you to quickly delete a given object in the list The remove (object) method perf…… -
Java based web framework alternatives
I tried to choose a Java based web framework to start a new project, so far I have a little troublesome decision I hav…… -
Java – how to calculate next week?
I want to accurately calculate the time of a week on a given date, but the output I get is an hour earlier Code: long …… -
How to implement unit converter in Java
How can I implement a unit converter in Java??? I'm thinking about an abstract base class: public abstract class Unit …… -
Java – is generic programming an example of polymorphism?
I'm doing a homework (a project) and one of the criteria is that I must take advantage of polymorphism in a way that s…… -
Minimal java8 NiO secure websocket client (WSS)
It took me a long time to find a simple java websocket client that can use WSS without mess I tried https://github.com…… -
Even if you implement Java in a simple POJO Java class io. Is serializable also a best practice?
In general, let a simple POJO Java class implement Java io. Is serializable a best practice? Solution Not usually Josh…… -
Java – classes that implement interfaces without type parameters cannot be compiled
I have the following test codes: public interface Container<I> { public void addClass(Class<?> clazz);…… -
If Java does not have a preprocessor, what is “import”
This article is in 2.2 1 says that there are no more typedef, definitions or preprocessor In C, include is part of the…… -
Java – extract data from PDF417, such as driver licenses
I have an android app and I'm scanning PDF417 barcode images After scanning the bar code, I got the following results ……