包含标签：Java 的文章
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Java – the difference between sha256 and RSA and sha256, and then RSA
What is the difference between using the following two methods to calculate a signature? >Use signature GetInstance…… -
Create repeated timer reminders in Java
I want a class that changes its private variables every 2 seconds I know if I do something import java.util.Timer; //.…… -
What is the correct action to take when closing a window in Java / swing?
I wrote this test code in my customuipanel class: public static void main(String[] args) { final JDialog dialog = …… -
How to initialize dynamic arrays in Java?
If I have a class that needs to return a string array of variable dimensions (and the dimension can only be determined…… -
Java – “package should contain content type part [m1.13]”
I tried to write to an excel file, but I kept getting an error: According to my understanding, I missed a jar file Any…… -
Java – thread / handler error – the specified message queue synchronization barrier flag has not been published
I received this error – As a relative newcomer to Java / Android, there is no doubt that I missed something, but what …… -
JavaFX IllegalStateException when processing jfxpanel in swing
I just came across something strange about JavaFX and swing When processing a JavaFX panel that has been added to a JF…… -
Java – how to populate with a list?
I have a list < string > in the controller I pass to the view I need to fill in < form: Select > with thes…… -
Using classpathxmlapplicationcontext in a stand-alone Java class
I haven't touched spring yet I saw the following code in a separate java project in my system You can help me understa…… -
Spring – JPA and Dao – what is the standard approach?
I am developing my first application using JPA / Hibernate and spring My first attempt in Dao class looked like this: …… -
Java – why do anonymous classes access non final class members of closed classes
We know that the final local variables can only be accessed in anonymous classes. Here is a good reason: Why are only …… -
rx-java – RxSwift – . subscribe vs . What’s the difference between subscribenext?
What is the difference between these two operators? http://reactivex.io Don't mention it subscribeNext. Solution In rx…… -
Java – PDF file download using BlockingQueue
I'm trying to download a PDF file using urlconnection Here is how I set up the connection object URL serverUrl = new U…… -
Can you help me collect the online material collection of Java best practices?
I work in a medium-sized development team and maintain a web application written in Java 1.4 for 8 years For new devel…… -
How to instantiate the Java Boolean wrapper class?
In Java, I can write code like this Boolean b = true ; It will work. I now have an object with a value of "true" How d…… -
Java generic parameters are scoped to any type
Is there a syntax or solution to restrict generic type parameters to any type? I know you can limit types to all types…… -
Delete the first element of stream in Java 8
I have used java Files in NiO library The walk () method generates a stream in Java 8 The problem is that the method c…… -
Why does my java custom cell renderer not highlight when rows / cells are selected?
I have a custom cell renderer to wrap cells with words, so more content can be read This is the code: import java.awt.…… -
Java – how to use the string list in namedparameterjdbc template to get the result
Try spring JDBC I use this as a reference I'm trying to get an actor with the same name Running this code gives me the…… -
Java – align swing components across panels
We have a JPanel that contains multiple jpanels containing jcomponents (let's say jlabels and jlabels) JText@R_540_241…… -
Java – remove the “Z” section from xmlregistry calender
When I like it below, GregorianCalendar calendar = new GregorianCalendar(TimeZone.getTimeZone("UTC")); calendar.setTim…… -
Java – change the default XML namespace prefix generated using jaxws
I am using jaxws to generate a web service client for the Java application we build When jaxws builds its XML for use …… -
Avoid multiple if statements in Java
I have written such a method But I think it should be refactored private String getMimeType(String fileName){ if(fil…… -
java – SimpleDateFormat String
I have this code block, where dateformat The format parameter will always be a string, which is why I do this ToString…… -
How does rxjava’s observable “iteration” work?
I started playing with RX Java and reactfx, and I became very fascinated But I have dozens of questions and I keep stu…… -
Java – what happens when we add two integer objects?
When we add two integer objects to Java, can anyone explain the internal behavior? (just like un@R_778_2419 @Object to…… -
How to use reflection to instantiate Java. Net using generics util. ArrayList
How to use reflection to instantiate Java. Net using generic classes util. ArrayList？ I'm writing a program that sets…… -
Java: a very simple scatter chart utility
I know there are many comparisons of java drawing libraries, but I can't find what I need I just want a simple and con…… -
Java-8 – always use cube-java8 to get exception “wrong type of constant pool index”
I am designing a sample project for Java 8 dialect My problem is that I didn't get it running I always get the followi…… -
Java – how to make the background activity smaller when opening the navigation bar?
I want my background activity to slightly open the navigation drawer to simulate the impact in the airbnb application …… -
Java – use the eclipse compiler in Jenkins to get compiler warnings / errors
I want to display eclipse compiler warnings in my Jenkins job Has anyone tried to use the eclipse compiler in Jenkins …… -
Java – converts a class object to a human readable string
Is there any way to automatically convert custom class objects to human readable strings? For example, consider the fo……