包含标签：Java 的文章
-
The Java – JDK API documentation is incorrect for the ArrayList constructor Is this a bug?
The JDK DOC of ArrayList constructor indicates that the initial capacity is 10 This is actually wrong because the init…… -
Use sun misc. Unsafe get the address of the Java array item?
I'm trying to understand Sun misc. Unsafe's document - I think no one really bothers to make it readable because it's …… -
Java – how do I load the camel attribute into a bean?
I've been reading the following pages about camel properties: http://camel.apache.org/using-propertyplaceholder.html I…… -
Java – eclipse can have multiple output folders like multiple source folders
I have an eclipse project that has two source folders – 'SRC' and 'test' I want to build from these two folders into a…… -
How do I use regular expressions to get a second matcher in Java?
See English answers > match at every second occurrence VA-123456-124_VRG.tif I tried this: Pattern mpattern = Patte…… -
Java – how to get publickey object from EC public key byte?
I am developing an application. I need to verify sha256withecdsasignatures with the help of secp256r1 (NIST p-256, p-2…… -
Java – how to use spark to process a series of HBase rows?
I tried to use HBase as the spark data source So the first step is to create an RDD from the HBase table Because spark…… -
Java – why is HashMap faster than HashSet?
I've been reading / searching why HashMap is faster than HashSet I am not familiar with the following statement >Ha…… -
Java – AWS S3 – lists all objects in folders without prefixes
I encountered a problem retrieving all objects (file names) in folders in AWS S3 This is my code: ListObjectsRequest l…… -
Java – how do I map values to enumerations?
Given an enumeration, each instance is associated with some values: public enum sqlState { SUCCESSFUL_COMPLETION("00…… -
Java – add JfreeChart to JPanel
If I have a my JPanel and a my JfreeChart How do I add this chart to JPanel? XYSeries series = new XYSeries("XYGraph")…… -
Are loops allowed between Java platform modules?
This is Java Module declaration of RMI module: module java.rmi { requires java.base; requires java.logging; …… -
Java – videoview ontouch event: pause / resume video and show / hide mediacontroller and actionbar
Problem summary: 1) How do I pause the video first instead of playing it now? 2) How to pause / UN pause video touch, …… -
Java – when the first day of the week is in the previous year, how to strictly analyze a date with only one year and one week?
My goal is strict parsing (for example, banning dates like 98 / 99) However, the following code raises a Java text. Pa…… -
Java – override server connector configuration with env variable with dropwizard
I have posted this question on the DW mailing list, but I have no answer I can assume that the following YML format is…… -
Java: Micro optimized array operation
I am trying to make a simple feedforward neural network Java port My current code is as follows (delete error handling…… -
Java – programmatically check whether there is enough memory on the SD card
My application is saving the file on the SD card, but before saving the file, I need to check whether there is free me…… -
Java – how to determine whether a string is an English sentence or code?
Consider the following two strings. The first is the code and the second is the English sentence (the phrase is accura…… -
Validate certificates for Java certificate store via cli
How do I validate x509 (or der format) certificates on the Java certificate store from the command line? I've studied …… -
Java – JSTL: check whether the string is empty
See the English answer > evaluate empty or null JSTL C tags8 This is hard coding I'm trying to replace with JSTL Th…… -
Java – the response of a web service using Apache CXF displays “unbound operation information..”
The problem description may be long Please be patient and provide any help, because I am a new network service What I …… -
Java – how to find UTC offset using joda?
I want to end with a string in the form of - 5:00 (if we're in New York State) What is the best way to use joda? Solut…… -
Java – querydsl – subquery in set expression
I use spring data JPA and querydsl (3.2.3) My simplified model is as follows: @Entity public class Invoice { @Many…… -
Java – scroll to specific text within the jtextarea
I'm trying to implement a function in the current program I'm writing. I want to learn how to scroll down to specific …… -
Java – git process: how to configure the one click release process in Jenkins?
We use the standard git stream branching model (development, master, release, patch, etc.) As part of our workflow, we…… -
Exception in thread “main” Java util. Missingformatargumentexception: format specifier ’10s’
There is no doubt that I will miss something very obvious here, but I can't understand it Any help would be appreciate…… -
Java – how do I use enumerations in getters and setters?
So what I want to do is this: Write a user class A user: >There is a user name, such as' fj3 '> there is a UserT…… -
How to prevent method overload in Java?
You can prevent overriding methods by using the keyword final. Similarly, how to prevent overloading? Solution You can…… -
Java – eclipse can have multiple output folders like multiple source folders
I have an eclipse project that has two source folders – 'SRC' and 'test' I want to build from these two folders into a…… -
Design – what makes Erlang suitable for soft real-time applications?
Some background I am working on building a programming language for digital media programming. It should support non s…… -
Java – mockito – “wanted but not called; but there are other interaction errors with this simulation”
I verified that a function was called using mockito, but mockito told me that the function I was verifying had never b…… -
Java – libgdx and scrollpane with multiple widgets
Trying to add multiple items to the scroll bar, I soon found that all "addactor" functions were not supported So, I ad……