Java
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Java – how do I check if a string is a valid XML element name?
You know the functions in Java, which will verify that a string is a good XML element name Form W3Schools: I found tha…… -
Java – create meta-inf / services folder in eclipse
I tried to create an extensible application in Java and chose to use SPI According to this tutorial, I'm paying attent…… -
Java – how to delete / filter / ignore certain packages from Emma (code coverage)
I tried to delete some packages from my report and got into trouble Can someone help me? I use Emma in my ant process …… -
Java – why not more boring GC
Except Azul, all GCS I know are concurrent, but at least there are some small worldwide components Why isn't there mor…… -
How to call collections on a part of a Java array Shuffle
So I have the following array: String [] randomList = new String [16]; randomList[0]="Dog"; randomList[1]="Dog…… -
Java – use the properties in the properties file
I apologize for the title I can't find a better way to explain the situation I use the property class to load property…… -
Java – how do I change the background color of jooptionpane?
I've added joptionpane to my application, but I don't know how to change the background color to white@ H_ 301_ 2@`int…… -
Java – check user name and password in Android
I have a username and password field, now I need to check it and redirect it to the next page of Android public void o…… -
Do java – HQL queries always hit the database and get results?
I'm going through hibernate and when to use criteria vs HQL. My understanding is to use hibernate. Whenever we query t…… -
Java – resource folder in Android studio unit test
I have a gradle project with the following structure: project/ src/ androidTest/ java/ …… -
Java – get the absolute path of all files in a given folder
I need to save all the file names and absolute paths in a given directory in memory myDirectory. List () – retrieves o…… -
Can you make an unclosed and indivisible Java application?
Is there any way to ensure that users cannot close or leave my swing application? I tried to make it full screen, but …… -
Predicate based method of Java 8 stream indexof
See English answers > stream way to get index of first element matching Boolean int index = list.stream().indexOf(e…… -
java – Selenium – driver. Getpagesource () is different from the source viewed from the browser
I tried to use selenium to capture the source code from the specified HTML file, but I don't know why. I didn't get th…… -
Java – simple XML parsing from XML to list
I use simple XML (simple-xml-2.6.2. Jar) to parse XML files, such as: <?xml version="1.0" encoding="UTF-8" ?> &…… -
Open source Java reporting framework
I want to create several reports and select data from several SQL tables, so I don't create different reports. I want …… -
Java – declare and throw and throw without is declared exceptions
What is the difference between dual methods in Java? public void methodA() throws AnException { //do something …… -
Check whether the elements in the array are subclasses in Java
Let's assume that I want to check whether the values in the object array belong to a superclass or subclass. For examp…… -
Java – get an instance of class [runtime type token]
I created a preferences class. For getters, I don't want to use runtime type token So this is my getter method: public…… -
java. math. BigInteger pow (exponential) problem
I did some tests on the pow (index) method Unfortunately, my math skills are not enough to solve the following problem…… -
Java – spring MVC does not record all exceptions
I have spring MVC settings to log exceptions using commons, but I find that some runtime exceptions are not logged Thi…… -
Java – how to compile only changed source files using ant
I'm trying to write an ant build for compiling the source folder, which is the target of my compiled script <target…… -
Java – Alphanumeric regular expression
I want a regular expression in Java, which must contain at least one letter and one number in any position The passwor…… -
Java – how do I initialize graphics G?
I want to display gameover images in Pacman games at the end of my life But I call paintgameoverscreen (graphics g), a…… -
Java – displays tooltips above cells in JTable
When the user enters an incorrect value in it, I need to display a tooltip above (or below:) the cell (see the figure …… -
Java 8 time zone conversion
In Java 8, I want to convert datetime from UTC to ACST (UTC 9:30) Input – > 2014-09-14t17:00:00 00:00 Output – >…… -
What happens when a collection in Java exceeds its capacity?
I have a service that schedules all calls in memory because we don't want to lose data. At the same time, we need this…… -
For Java applications based on play 2.0, can I use groovy templates instead of scala?
I'm the new play 2.0, and it's hard for me to understand the scala template used to create views Solution Yes, there i…… -
Java – parameter org.org not found gradle. api. Project method (Android)
I got a bug. When I tried to compile my project in the studio, I had searched a lot without a real solution Error: (17…… -
Java – explicit and implicit locks
Using locks (Java. Util. Concurrent. Locks. Lock) instead of the keyword synchronized, is the method wait() exactly th…… -
External connection and ORM mapping in Sqlalchemy
I use ORM mapping 0.6 in Sqlalchemy eight I have three tables (a, B and C) and there are no foreign keys between them …… -
Enforce warnings in Java
I want a mechanism to manually throw compile - time warnings I'm using it to mark unfinished code, so I can't forget i……