包含标签：Java 的文章
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Java – retrieves the subdocuments in the array as dbobjects
I'm new to mongodb. I'm using a Java driver I have this file structure: { "_id" : ObjectId("4f7d2ba6fd5a306d82687d48")…… -
How to use generics in Java to return numbers?
I have a class similar to the following, but I have a question about using generic return values import java.util.Arra…… -
Perform: creates a local backup of the current pending list
In perforce, I have a list of files to change Now I want to go back to the base, but I haven't loosened my changes, so…… -
Java – multithreaded gae servlet to handle concurrent users
I want to multithread my gae servlet so that the same servlet on the same instance can process up to 10 concurrent req…… -
Opencv – how to interpolate between data points?
I am developing a software using OpenCV and QT to draw data points I need images that can fill in incomplete data I wa…… -
Java – enable lambda expressions
In the program entities.stream().filter(m->m.getId()==id).findAny().get(); Where entities are lists Set all librari…… -
Java – get only the date of the timestamp
This is my following function. I'm passing a timestamp. I just need to return the date from the timestamp, not the hou…… -
Java – how to add the contents of a list to the end of another list?
How to append the contents of a list to the end of another list? Solution List. addAll() -
Lightweight web services produced in Java (no application server)
Is there any Java library that allows you to build a simple stand-alone Web service server without any application ser…… -
Java – JList – when you click a selected item, deselect it
If I click on the selected index on JList, I want it to be deselected In other words, clicking on the index actually s…… -
Examples of abnormal behavior in Java
Can anyone explain why the following if statement evaluates to false? public void addShapeToWhiteboard(PolyLine shape)…… -
Java – rxtx on MAC – serial port is already in use
I installed rxtx on my Mac Both Java jar program and Arduino software regard Arduino as a USB modem if they both claim…… -
Java – Dao and services?
I always have a problem. I can't really think of a service object that encapsulates many Dao methods I mean, for my se…… -
Implementation of simple and easy folder encryption with JavaScript
So today I want to tell you a good way: encrypt Windows 9x / 2000 folders. By encrypting a folder, all files in the fo…… -
Eloquent ORM code prompt phpstorm
So I just started with laravel (using V5) and eloquence I'm trying to get some basic APIs and run them, and notice tha…… -
java. lang.NoClassDefFoundError：org / springframework / context / EnvironmentAware
I am using spring MVC to create a web application I have started to integrate the spring security library When I try t…… -
Java – Stanford robot Karel throws NullPointerException
I have started to learn the programming method (cs106a) course on Stanford website I use eclipse indigo classic 3.7 1 …… -
Java square root integer operation is not cast?
Math. The sqrt() function takes double as the parameter and returns double I'm using a program that uses a perfect squ…… -
Java – which length is the string key of a HashMap that is considered a bad habit?
I always pay attention to good performance and clean code I tried to grasp whether it was reasonable to have a HashMap…… -
Java: interface vs abstract class (about fields)
From the content I collected, I want to force a class to use specific private fields (and methods). I need an abstract…… -
Java – using Apache velocity and spring framework 3.2 four
I'm new to spring. I want to use velocity to set it up Therefore, I created a new spring project, a new spring MVC pro…… -
Java – this: cannot be used in a static context
Can you help me with the following code? The error is: "cannot be used in static context" public class Sample2 { /…… -
Java – eclipse command line parameters
I know how to run my application using the run configuration menu and command line parameters My problem is that wheth…… -
Solution to the problem of Chinese garbled code in Java compressed zip file
Usually, after using java to package files to generate compressed files, there are two places where there will be garb…… -
Java – record JSON requests and responses for JSON
I have a Java Web application that exposes restful APIs My requirement is to record all JSON requests and responses pr…… -
Object oriented programming: abstract data types in Java
In this article, we will examine data types in Java, but we will introduce the concept of abstract data types (ADT). W…… -
Learn game design of Java swing from me (2)
Remember the minicooper who shuttles through the traffic of Hollywood like an elf in stealing the day? Mark Walberg an…… -
Java – multithreading – multiple users
When a single user accesses an application, multiple threads can be used. If there are multiple cores, they can run in…… -
Self modifying code in Java
Have you ever created or encountered self modifying code in Java? Solution Ignore the sad world, you may pass the self…… -
Java – libgdx: read from JSON file to ArrayList
I need help reading the JSON file to ArrayList I have JSON files: [ { "name": "Wall","symbol": "#",},{ …… -
. Net – multithreaded self managed WCF service
It seems that WCF uses only one thread when using self - hosting I want to use multiple threads or some kind of thread…… -
Java – sets the button height and width to wrap the contents and populate the parent
I'm developing an application where users should be able to change the appearance of buttons by pressing other buttons……