Java
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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?…… -
Which mobile phone supports which J2ME (Java Micro Edition) specification?
I can't find the latest chart on which mobile device supports which Java I'm particularly interested in Nokia smartpho…… -
Java – how to get int values from a spinner
I use NetBeans 7.1 to write Java I have a JFrame. I have a spinner with integer value on it. I want to know how to get…… -
Java generics and return types
I've just come across something I don't understand Why is every loop illegal when the second is the same? public inter…… -
Is there a Java geometry library? (not JTS)
I want to be equivalent to CGAL (c) – I want convex partitions of polygons or at least triangulation It must also be f…… -
Java – how to solve ‘define and throw special exceptions instead of using general exceptions.’
When the length of the two lists is not equal, I need to throw runtimeException We use the sonarqube tool for code rev…… -
Java – Proguard does not obscure jar dependencies
I have a project with POM given below XML file When I issue the command MVN clean compile assembly: single install, I …… -
Java – simulate a spring validator when unit testing the controller
When coding the unit test postmortem into the code created by another project, I encountered the problem of how to use…… -
Java – how to identify whether a string contains special characters that cannot be stored using utf8-mb4 character sets
Please refer to this tweet and the thread below. We are trying to store similar tweets to the database I can't store t…… -
Java – use huge memory in notifications
I am developing a service application that displays the progress of the timer in the notification area (with progress …… -
What is the difference between const and volatile pointers?
What is the difference between const and volatile pointers? Solution The difference really comes down to the differenc…… -
Java – optimistic cache concurrent design pattern
I have a web service running on a set of servers The network service performs some internal processing, and then you c…… -
Java – relative to the current date in the Dbunit dataset
I wonder if there is any way to specify, for example, tomorrow as the date in the Dbunit XML dataset Sometimes the cod…… -
Java – how to convert jsonobject to gson JsonObject？
I have an org json. Jsonobject object Create gson. From What is the simplest method of jsonobject object? thank you So…… -
How to set the default file name of swing Jfilechooser?
I want to set the default file name to untitled. In this Jfilechooser text box txt. Can I set it? Solution Use the fol…… -
Java – unit testing using Apache Mina as an emulated / in memory SFTP server
I'm working on how to use Apache Mina Their documents are a little inadequate for my powerless brain I've seen useful …… -
Code snippet for creating a file from the contents of a blob in Java
I have some files stored in the blob column of the database in Oracle 9 I want to store those files in the file system…… -
Java: datainputstream replaced with byte order
The following is my code to replace datainputstream to wrap an InputStream, but in addition to the common method of re……