包含标签：Java 的文章
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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")…… -
Emberjs with Java rest backend
I'm working on Java (possibly Scala) for a project that will use ember and ember data I know I can write back ends to …… -
Java – understanding the future / threads
I tried to use futures for the first time It looks smart. You can cancel a job, but it doesn't work as expected In the…… -
Java implementation chain surface test questions
This note has been sorted out for a whole week. Each line of code is written by yourself, and the test run is successf…… -
Java – simple rest resource versioning in jax-rs based implementations?
The best practice of rest resource version control is to put the version information into the accept / content type he…… -
How does the prime test in Java work?
The following code snippet checks whether a given number is prime Can someone explain to me why? This code is to give …… -
Java – wicket 1.5 to 1.4
Compared with the latest version 1.4, what are the 1.5 new features of small portal? The first candidate will be annou…… -
Detailed explanation of HTTP communication using java
Overview of HTTP communication There are two main modes of HTTP communication: post mode and get mode. The former send…… -
Java – how to programmatically obtain jmap histograms?
I want to programmatically get the output equivalent to jmap histo from within the monitored application I see that bi…… -
Method of creating zip compressed file in Java
This article describes the method of creating zip compressed files in Java. Share with you for your reference. The det…… -
Java implementation of reverse order of single linked list
The following code accurately introduces the reverse order of single linked list implemented by Java. The specific con…… -
Is there a class in Java 8 that implements “null termination” flow without scrolling?
Or is there a better way to do this? I'm missing? I want to create a vendor - based (usually unrestricted) flow, but w…… -
Multithreading – Delphi forms are created without freezing the main thread
I'm in trouble with what I want to do I have some big forms that need some time to create To make the application load…… -
Java – hidden fields in MVC
I want to use spring hidden tags in the following code Is it possible that in the following code, I have to write thes…… -
Methods for creating custom Java annotation classes
If you are already using java programming and any popular frameworks such as spring and hibernate, you should be very …… -
Java implements the method of reading files in segments and uploading them through HTTP
This example describes the method of reading files in segments and uploading them through HTTP in Java. Share with you…… -
On parsing and generating JSON using java
JSON overview JSON, namely JavaScript object notation, is a subset of JavaScript object notation. It has the following…… -
Method of operating excel with Java
This paper describes the method of operating excel with Java. Share with you for your reference. The details are as fo…… -
An example of an infinite loop caused by a for statement in Java
For loop is often used in java development. It is very helpful to simplify business processing and improve efficiency.…… -
Discussion on the method of overload in Java
Reload (reload method): Java allows multiple methods in a class to have the same name, but with the same name, they mu…… -
Multithreading – is there a way to kill all forked threads in a ghci session without restarting it?
Based on my previous question, I would like to ask if there is any way to kill all user created threads in ghci sessio…… -
Using XOR operator to encrypt string in Java
Through the XOR operation symbol and a specified value, the value of each character of the string can be changed, so t…… -
Java – how to find the arctangent of a line?
I have a line (x1, Y1) and (X2, Y2) I want to use Tan inverse to find the angle of the line. How can I do this in Java…… -
Java – why can interfaces only be declared in top-level classes?
OK, I know this is the rule: I just want to know why and what might happen if interfaces were allowed to be declared i…… -
Java implementation to find the depth and width of binary tree
This is a common operation on binary tree. To sum up: Set the data structure of the node as follows: -
JDBC operation MySQL database instance
This article describes the method of JDBC operating MySQL database. Share with you for your reference. The details are…… -
Eclipse configuration Tomcat and JDK steps diagram
The first time I configured Tomcat and JDK for eclipse, I would encounter some problems. Xiaobian was also confused at…… -
Java – you need a way to scale fonts to fit rectangles
I just wrote some code to scale the font to fit a rectangle It starts at 18 wide and repeats until it fits It seems ve……