Java
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How to create a simple but well structured score table (score) in Java?
I'm using very basic sound synthesis to create audio and effects in my game Basically, I have some ways to make a freq…… -
Java: interface containing internal enumeration; Extend functionality in implementation classes
I have the following interface: @ h_ 502_ 2@package example; import java. awt. Point; public interface Thing { public …… -
Java – can I schedule messages using a custom algorithm instead of using rabbit MQ for looping?
I am using the looping function of rabbitmq to send messages among multiple consumers, but I can only receive one mess…… -
Java – extract files using junrar
I asked a question about extracting rar files in Java. Someone pointed me to junrar The official website has been clos…… -
Java – how to sort Horizontally Partitioned Data
I have a telco billing software system There are daily user telephone records Logs are divided by date (month) level E…… -
Java – what is the best practice when implementing equals () with entities that generate IDS?
If I have a table a, B, C, D Now, if I'm going to create a business object based on this table (for example, in Java),…… -
Java – weave yourself into a corner
We have a set of classes derived from a set of common interfaces IFoo-> BasicFoo,ReverseFoo,ForwardFoo IBar -> U…… -
Java – can I register a receiver in a test case?
I want to test whether the alarm programmed with AlarmManager is triggered in the unit test. If so, it will be trigger…… -
Java – how to call super (…) and this (…) in the case of overloaded constructors?
I never needed to do this before, but since both must be the "first line" in the constructor, what should I do with it…… -
java – Cron Job in play framework 2.0
How to schedule tasks in play framework 2.0 through cron expressions? Equivalent to @ on ("< enter cron expression …… -
Java – the usual hibernate performance trap
We have just finished configuring our application She's starting to slow down This is a legacy mapping Who works, do t…… -
Do a “memory dump” Java application?
I have Java applications that unfortunately start consuming considerable memory after a period of time To complicate t…… -
Java – where do I sort?
I have a database, I query, I don't know where to perform the sorting of results, so far, I have the following options…… -
Reflection – Java 8 – invalid constant type
I have a problem with the reflections library Dependency and in POM Build in XML <dependency> <groupI…… -
How to eliminate the gap between large Java Swing Tags
In my application, I have a label with a font size of more than 200 This label contains large up and down (irregular) …… -
Java – configure spring security to use custompasswordauthenticationfilter
I have implemented my own lowercaseusernamepasswordauthenticationfilter, which is just a subclass of usernamepassworda…… -
Java: socket read timeout exception
I tried to call a very heavy process When I execute this process, I set a ridiculously large number of timeout times: …… -
Java syntax sugar
I came across this code block today. I don't know how it works I know how to do anonymous classes, but I'm used to see…… -
Java – how to convert string arrays to objects using gson / JSON?
I have a JSON like this: [ [ "Passport Number","NATIONALITY","REASONS" ],[ "SHAIS100","INDIA","" ],[ …… -
Can I use two Java classes with the same name and the same package?
Can I import and use two different classes with the same name and package in Java? For example, suppose I have two cla…… -
Java – how to use in Net?
Lucene is a good search engine, but Net version is the official JAVA version (the latest stable. Net version is 2.0, b…… -
Java Double vs double：class type vs primitive type
I'm curious about the performance difference between Java classes and primitive types So I created a small benchmark a…… -
How to get the source code of web pages from Java
See English answers > How do you programmatically download a web page in java8 > http://www.cumhuriyet.com.tr?hn…… -
Java – thread exit and uncapped exception: no stack trace
My application is causing a forced shutdown somewhere instead of using the usual (and very informative) stack trace in…… -
Java – hide the program in the windows system tray
I want my program to display an icon in the taskbar status area near the clock in windows and find a way The thing is,…… -
Deadlock in Java: when occurs
I'm developing an application for J2ME. Sometimes it's completely frozen. AMS takes a long time to close it In my opin…… -
Although the serializable interface in Java has no methods and no fields, it can realize its functions What about?
Although Java io. Serializable interface public interface serializable {} surprisingly does not contain any methods an…… -
Java – can I specify a class wide group on a TestNG test case?
I have a base class to represent database tests in TestNG. I want to specify that all classes extended from this class…… -
Java – how to clear bad characters that are not suitable for utf8 encoding in MySQL?
I have dirty data Sometimes it contains characters like this I use this data to query WHERE a.address IN ('mydatahere'…… -
Java’s better way to delete files (if any)
We need to be in file Delete () before calling file. Exists() before deleting the file File file = ...; if (file.exis…… -
Java – why do we need to synchronize on the same object to make notify () work
I got Java lang.IllegalMonitorStateException. I mentioned this problem and it solved my problem The first answer is To…… -
Java – how do I check if a thread terminates?
When does the thread reach the termination state? When the end of the run () method is reached, will it be terminated?……