Java
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Explain in detail the basic methods of implementing SHA1 and MD5 encryption algorithms in Java
SHA1 MD5 MD5 (message digest algorithm 5), that is, the fifth edition of message digest algorithm. Message digest is a…… -
An example explains the association query of data in MySQL by Java’s mybatis framework
Mybatis provides advanced association query function, which can easily map the result set obtained from the database t…… -
Java array element deletion and implementation of forward code
No more nonsense, just post the code to everyone. The specific code is as follows: -
Java to find the number of substrings in the string
1. Use indexof method: 2. If the substring is not a string with the same beginning and end, it can also be implemented…… -
Java implementation of single linked list and two-way linked list
This example shares the relevant codes of Java implementation of single linked list and two-way linked list for your r…… -
Preliminary notes on the use of Java’s JSON format conversion library gson
Now there are some open source projects that can convert Java objects into JSON. But most projects require you to add …… -
Give an example to explain the basic usage of Java JSON class library gson
Gson, a Java class library, can convert Java objects into JSON or JSON strings into an equivalent Java object. Gson su…… -
Detailed steps for Java connection to MySQL database
This article mainly takes MySQL as an example to talk about how Java connects to the database. The specific contents a…… -
On overloading of Java methods
Method overloading means that multiple methods with the same name but different parameters can be defined in a class. …… -
Why Java net. Sockssocketimpl is the default Java net. Socket implementation?
The question is simple Why does a socks aware socket implementation implement Abstract Java net. The default choice of…… -
JavaFX – how to create screenshots of snapshot / (invisible) WebView
I want to create a snapshot / screenshot / image in WebView in JavaFX (8) This WebView does not need to be visible (in…… -
Java – can’t contain the same interface as different parameters?
Consider the following example: public class Sand@R_886_2419@ { public interface Listener<T extends JComponent&…… -
Java – subtract 1 hour to datetime using joda time
I just want to subtract 1 hour from datetime. I try to find it on Google. I find a method called minus, which requires…… -
Java – pause the timer and continue
Please refer to the code posted by @ Yuri here How to stop a timer after certain number of times. If I want to stop it…… -
Java: faster alternative to string (byte [])
I am developing a binary data downloader based on Java The data is transmitted via text - based protocol (Uu encoding)…… -
Java – cortlin: why can’t I do a task in the loop guard?
Why is this syntax invalid? The error reported by IntelliJ is that only expressions are allowed in such a context (lin…… -
Java – sets the number of lines to display for multiline text in SWT
I am using the following for textarea ToolBar bar = new ToolBar(@R_532_2419@,SWT.NONE); ToolItem item = new ToolItem(b…… -
Java – how to set environment variables through tasks?
I have a graduation application My main graduation document includes some tasks (groovy) Solution As far as I know, yo…… -
Java – fast double string conversion with given precision
I need to convert double to string with the given precision String. Format ("%. 3F", value) (or decimalformat) execute…… -
Java Card: how to load SIM applet into a real smart card?
I developed a Java card applet in eclipse and obtained a cap file Then I use jcmanager – Java secure card manager to l…… -
Java – how to obtain the column name of the primary key through JDBC
I have the following code: DatabaseMetaData dmd = connection.getMetaData(); ResultSet rs = dmd.getPrimaryKeys(null,nul…… -
Creating a console in Java
When I try to use Java lang.System. Console(), I get a null pointer I can still write and read from it, but this only …… -
Java – Custom httpmessageconverter in spring MVC
When implementing the restful API, I wrap all the data in one object to make it look like this {error: null,code: 200,…… -
Java – robolectric shadow does not work
I tried to create a test with robolectric My goal is to be able to replace the functionality of a class from custom be…… -
How to convert itextpdf documents to byte arrays
I need to convert the itextpdf document file into byte [] I have tested that I did not create PDF correctly The proble…… -
Java – call the destroy method of the servlet
According to link http://www.xyzws.com/Servletfaq/when-is-destroy-of-servlets-called/20 , one of the reasons for calli…… -
ORM – many relationships in laravel: belongstomany() vs. hasmanythrough()
What is the difference between using belongstomany() or hasmanythrough() when defining many to many relationships in l…… -
Creating a console in Java
When I try to use Java lang.System. Console(), I get a null pointer I can still write and read from it, but this only …… -
Java – digest authentication with Jersey client
I've written a rest web service with Jersey server (completely rock!) On the server side, I chose a digest authenticat…… -
Java – gson parsing dynamic JSON fields
I can't seem to figure that out I read several so posts (here and here) and my situation is a little different I'm not…… -
Java – fast double string conversion with given precision
I need to convert double to string with the given precision String. Format ("%. 3F", value) (or decimalformat) execute…… -
Java – NCSs type count violation
I am not quite clear about the violation proposed by PMD Basically, I have two questions: >What can I do to get rid……