包含标签：Java 的文章
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Java-8 – optional, do not handle null elements
When I experiment with optional < T >, I do not process null elements, so in the following example, it throws Nu…… -
How to add a scrollbar in JavaFX
I'm trying to add a scrollbar to H@R_869_2419 @Yes Scrollbar was added, but I didn't scroll How can I make it work? pu…… -
Java – get all rejected additions to set
I'm not very good at hashsets. I want to know if I can use them The addall method retrieves duplicates deleted by hash…… -
After adding the default method in Java 1.8, does the interface remain completely abstract?
After adding the default method in Java 1.8, does the interface remain completely abstract? I'm sorry if I can't state…… -
The list of Java objects is sorted by specific objects, not by
I have the following jsonarray trying to sort it So, to convert my jsonarray to ArrayList, then sort them and convert …… -
Cannot add an object of type T to the list in Java
I've been learning generics in Java Although I understand the concepts of type inference, parameterized classes and me…… -
Java – Android retro fit: missing method body or declaration abstraction
I'm writing an Android application that will use retrofit to make API requests I have such a helper class: public clas…… -
Java – boxed Boolean equivalent
Quick question: are you sure this code is always true? Boolean b1 = true; Boolean b2 = true; System.out.println(b1 == …… -
Java – is there a way to fix the window?
Is there any way to fix the window so that users cannot change the window size in Java? Solution The frame class (and …… -
How many classes and packages do we have in Java 6?
I want to know the number of built-in classes and packages provided by Java 6 Please provide a web address for this in…… -
Java – monitor Internet activity
I want to design the Java application for montior Internet activity Let's consider opening different browsers and send…… -
How to write a Java directory selector?
How to write a directory selector is as follows: or In Java? PS 1: I'm developing a desktop application. I use swing i…… -
Java – swing component: vertical text problem
If I have a button like the one in this image: http://www.freeimagehosting.net/image.php?4cd775814c.png How can I make…… -
Java – get request parameters in @ viewscoped bean
I have a list from which the user can select "PQ" (link list) When clicking or otherwise entering the browser, the mai…… -
How to wait and close the command prompt in Java
I use the following code to execute the batch file: java.lang.Runtime rt = java.lang.Runtime.getRuntime(); Process pr …… -
Java – convert object to object []
The method in the library I'm using returns an object, but it's actually an array of objects I'm trapped where I need …… -
Java – what does this’ static ‘mean and why
public class tt { public class tt { static{ System.out.println("class tt"); } } This is the first time I have …… -
Java API for calling rest services
Can anyone suggest a better open source Java API to call rest services? I also want to know if the restlet API support…… -
Where to find synchronization contention evidence in Java?
Our Tomcat web application feels slow when used by hundreds of users The server is in the hosting company, and their r…… -
Forking processes with Java
Can a complete "program" branch be created from a single execution sequence into two subroutines? The subroutines are …… -
Java – how does a class that references itself work?
Suppose we have a class like this: class XCopy { public static void main(String[] args) { int orig = 42; …… -
How do java public / private and static modifiers affect multiple variables declared on one line?
Are the following equivalent? private static boolean readAllFiles = false,readAllDirs = false; private static boolean…… -
Java compensate 0.05 for money
I have 7.125 (double) and need to make it 7.15 What is the easiest way? Found round, but I got 7.13, please help thank…… -
Java – create a unique random number
I created the following method to create a unique random number (this unique value belongs to the node of the tree): s…… -
Java – connect two calls through a web application
I need to add a feature to my java based web application that allows users to click on links, and the application will…… -
Java – how do I step through the program in eclipse?
I want to follow a java program so that I can understand how everything works together I can do this with visual studi…… -
Java – is there a real-world project using clojure that uses multi-core systems that I can see?
Is there a real-world project using clojure that takes advantage of the multi-core system I can see? I think if clojur…… -
Java – MySQL timeout – should I set autoreconnect = true in the spring application?
After a period of inactivity on my website (using spring 2.5 and MySQL), I received the following error: org. springfr…… -
Java – the problem of converting integer to string
I want to add two numbers from the EditText field So far, I have the following code that I believe converts the EditTe…… -
Java – Eclipse INI file; Parameters, meaning and best practice values
I want to fine tune my eclipse INI file to best adapt to my system and development environment http://wiki.eclipse.org…… -
Java – let selenium pass Htaccess popup login
I use webdriver (selenium 2) and Java on Linux I am using webdriver to automatically fill out the form and submit it I…… -
Java – eclipse link, JPA, Oracle, Weblogic, calling persist do not commit the database
I'm just starting to look at Java persistence (currently using eclipse's eclipse link default provider) Basically just……