Recent Posts
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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 …… -
Java – find all the leaves through binary search tree iteration
I'm new to trees. I'm trying to create a "leaf iterator" I think it should put No Left and All nodes with the right va…… -
Java – spring boot and thymeleaf – remove strict HTML error checking
I use spring boot as an MVC application, and my view technology is thymeleaf One thing I need to do is copy the HTML o…… -
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…… -
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 – 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 – 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 – length in array and length () in string
When we talk about arrays and length (), why is the length of data fields when we talk about strings in Java? Means: i…… -
Java – Android – can you publish different applications with the same keystore file in multiple accounts?
There is already an answer to this question: > can I use the same keystore file to sign two different applications?…… -
Java – about the precision of float type
I can't understand why float f = Integer.MAX_VALUE; System.out.println(Integer.MAX_VALUE); System.out.println((int)f);…… -
How do I escape a set of special characters in Java in a method?
I use Lucene to search, but Lucene has a bunch of special characters to escape: - && || ! ( ) { } [ ] ^ " ~ * …… -
Java – length in array and length () in string
When we talk about arrays and length (), why is the length of data fields when we talk about strings in Java? Means: i…… -
Do you need a reference to the second value to sort tuple vectors?
I have a vector of integer tuples and want to sort them by the second element of each tuple: fn main() { let mut t…… -
Java – default parameter in jar manifest
Is there any way to create a jar file that contains some parameters passed to the main class? (no need to add paramete…… -
Java – JAXB: how to customize XML serialization of two fields
I have a legacy class with many public double fields Use double MAX_ Value initializes all double fields to indicate t…… -
JBoss – jee6 rest service @ aroundinvoke interceptor is injecting an empty HttpServletRequest object
I have a @ aroundinvoke rest web service interceptor. I want to use it to record common data, such as classes and meth…… -
Java – is this AES encryption secure enough?
I from http://www.ravenblast.com/index.php/blog/android-password-text-encryption/ Having obtained this code, although …… -
Java – in spring data public 2.0 Querydslpredicateexecutor not found in 4
It took me hours to find querydslpredicateexecutor. In the spring data Why do you call it Solution It's in 2 X from qu…… -
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 – 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 …… -
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 – JPA many to many connection table entity, compound key “null ID generated”
This is my entity: public class Account extends AbstractEntity<Long> { @Id @SequenceGenerator(name = "a…… -
Redirect Java – version to a file or variable
This may be a stupid question, but I tried to redirect the exit of the "Java - version" command to a file or variable,…… -
Java – spring boot and thymeleaf – remove strict HTML error checking
I use spring boot as an MVC application, and my view technology is thymeleaf One thing I need to do is copy the HTML o…… -
Java – button text disappears in KitKat (API level 19)
The main menu of my application (a game) uses standard Android buttons In addition to nexus 7 and Android 4.4 All equi…… -
Java Apache POI, how to set the background color and border at the same time
At first I wanted to say that I was new in the developer world I tried to generate an excel table with a bordered mult…… -
Zero length matching in Java regex
My code: Pattern pattern = Pattern.compile("a?"); Matcher matcher = pattern.matcher("ababa"); while(matcher.find()){ …… -
How do I determine the size of permgen in a Java application (that is, programmatically)?
>Is there any way to measure the permgen size currently used in my java application? I cannot use external analysis…… -
Java generics and factories
Establish: I have some formatter interfaces: interface Formatter<T extends AbstractItem> { String format(T ite…… -
Java – generic list type with question mark
See the English answer > what is PECS (producer extensions consumer super)? 11 List<? extends Command> myVar …… -
Java – mask string with characters
Hey guys, I tried to find a way to hide the string, but the code I found is only applicable to my application... Is th……