Java
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Java – what is the purpose / purpose of abstract classes? Look for real-world examples
Can someone show me an example of an abstract class in Java? Something with real - World Applications (rather than tex…… -
Java – what is the difference between putting the most likely real conditions in if, else if, or else
Is there any difference in putting the most likely conditions in if, else if, or else conditions For example: int[] a …… -
Java – an effective implementation of equals (object o)
After I finished writing the title, I read so post, but still decided to discuss the implementation of bugs in Java Th…… -
Java enumeration list in class [copy]
See English answers > java enums: List enumerated values from a class 4 Namely public static <T extends Enum>…… -
What is the difference between byte [] and list in Java?
Both can be used to create byte lists But what's the difference between them? byte[] buffer; List<Byte> buffer; …… -
Java / Swing: low key button height?
I want to reduce the vertical size of JButton The following code applies to k > 1, but I can't seem to reduce the s…… -
Java string format
I have a property file containing strings in the following format: audit.log.events.purged=The audit events were purge…… -
An attempt to use resources in a multithreaded server in Java
I'm reading a book "java networking 4th Edition" and Chapter 9 on server sockets, while explaining the multi-threaded …… -
Java – commons exec: when I call the executor Suspend when execute (commandline);
I don't know why I try to capture the output of the process through commons exec, and then I continue to hang I have p…… -
How to perform memory analysis on remote Java Web Applications
I know we can use tools like jpprofiler Any ideas? Solution You have visualgc, which is not very advanced, but you can…… -
How do the consumer and begin methods work within the Java functional interface
Who can let me know how the following procedures work internally: public class Main { public static void main(String…… -
Java – why is enum considered safer than constants?
In our example, we can choose to define an enumeration type that will limit the possible specified values (i.e. improv…… -
Why not use class for Java – t getInstance (final type)?
So I'm delving into Java and curious about the use of this type parameter <T>T getInstance Then arg Class<T&g…… -
Java – applet – how do I use this code using strings instead of characters?
I'm slowly trying to write a program that converts hexadecimal numbers to decimal numbers I'm not interested in readin…… -
Being confused by Java generics requires a cast
I'm confused about the following code: import java.util.ArrayList; import java.util.LinkedList; import java.util.List;…… -
Unit test – how to simulate the improved service observable that calls onerror?
I'm testing this code service.getProducts() .subscribeOn(Schedulers.io()) .observeOn(AndroidSc…… -
What is a “runtime class” in Java?
I try to understand object The function of the getClass () method Documentation means that it "returns the runtime cla…… -
Java – generics and comparators
I was studying generics and found that the following code gave compile - time errors when comparing methods class A<…… -
Java – Android navigationview cannot respond to the click event on the project
I'm trying to add a Navigation view to my application, but for some reason, I can't make it respond to any click event…… -
Java – sun. Not found security. ssl. SSLSessionImpl
When I try to use okhttp or javax ws. rs.client. Client, the following error occurs In sun security. Search in SSL pac…… -
How do I send commands to a running Java program?
I have a java program that I want to send commands from my Win32 Application Usually I use WM_ COPYDATA, but what opti…… -
Java thread is in doubt
I previously published a query about Java threads ( link text) Based on the answers I received, I decided to implement…… -
How do I force two Java threads to run on the same processor / core?
I want a solution that does not include critical parts or similar synchronization alternatives I'm looking for somethi…… -
Java – other languages in PHP and Hadoop / MapReduce implementations and other languages in the cloud
I began to learn some Hadoop / MapReduce, mainly from PHP background, and only need some Java and python However, it s…… -
Java – when to use getinstanceof instead of constructor
A few months ago, I attended a speech hosted by representatives of two independent software development companies It i…… -
Java – how to find an executed SQL query that does not return anything?
import java.net.URL; import java.net.URL; import java.net.URLConnection; import java.sql.*; public class searchlink{ p…… -
Java – how do I automatically log in to this site using system credentials?
I need to develop a web application for intranet users I don't want them to enter login credentials every time they vi…… -
Java – how to load property files based on spring configuration files
How to create a project architecture to support multiple environments With the help of spring, each environment will h…… -
E-mail module in Java?
Please suggest the best email module for sending email in Java Solution To further simplify the use of JavaMail, you c…… -
Java – how do I pass parameters to a thread and get the return value?
public class CalculationThread implements Runnable { public class CalculationThread implements Runnable { int inp…… -
Java – ArrayList and indexof problems of my objects
I have an ArrayList problem with Java I created an object that contains two attributes X and Y. now I loaded some obje…… -
Java – what is the exact difference between these two sets of statements?
Set<Type> union = new HashSet<Type>(s1); Set<Type> union = new HashSet<Type>(s1); and Set<T……