Recent Posts
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Java – how do I store passwords securely in memory when creating accounts?
Our web - based application uses the password specified during account creation to bind user accounts to users For Jav…… -
How to capture the exit status of shell commands in Java?
I am creating a JUnit test file for my csvreader I am reading the contents of the CSV file and writing the contents to…… -
Java – find the set of integers where two linear equations hold
What algorithm can I use to find the set of all positive integer values of N1, N2,..., N7, where the following inequal…… -
Java – use collection Stream is dynamically grouped by specific attributes
I tried to group a list of objects by multiple attributes by using java 8 collection stream This is very effective: pu…… -
What is the easiest way to do “yes” in Java?
Many languages have tools to check whether an object belongs to a certain type (including a parent class), which are i…… -
Java – classnotfoundexception when including library jar
In my android project, I added a library jar. Jar in the LIBS folder >Google gson (COM. Google. Gson) > JBoss ne…… -
Java – get HashSet from the key of HashMap?
I have a very large (100'000s entry) HashMap Now, I need a HashSet that contains all the keys in this HashMap Unfortun…… -
Java – can can can Guice automatically create instances of different classes according to parameters?
The standard object factory may be as follows: interface I { ... } class A implements I { ... } class B implements I {…… -
Gson, jsonelement, string comparison in Java
Well, I want to know that it may be very simple and stupid, but after a period of struggle, I don't know what happened…… -
Tyrus – simple java application – implementation class not found
I am developing simple applications to help me learn the concepts of websocket and Tyrus in Java This is my server (se…… -
Convert object [] array to int [] array in Java?
There seems to be no simple way to do this, but this is what I have done so far. If someone can correct it, its work w…… -
Compiling java files using Java programs
Is it possible for programs written in Java to compile files using the JDK compiler (in addition to using java to open…… -
Java – writing files in clojure
I am using this function to write files in clojure (defn writelines [file-path lines] (with-open [wtr (clojure.java.…… -
How to use java to get all text files from a folder?
I need to read all ". TXT" files from the folder (the user needs to select this folder) Please tell me how to do it? S…… -
Java – liquibase attempts to apply all changesets, even if the database exists
I use spring - liquibase to perform any migration required to stage the database applicationContext. XML looks like &l…… -
Java – the default date year is set to 1970
I need to parse a string with no year set But when I output the date, it will increase the year. I tried to set the ye…… -
Compress and unzip folders and files using java
If my application wants to use java to compress resultant files (filegroups) dynamically, what are the options availab…… -
Java – throw an exception during the try with resources declaration
Suppose I have the following try with resources statement in Java: try (MyResource myResource1 = new MyResource(); MyR…… -
Java – how to prevent concurrency in Web Service APIs?
We have three web services (/ A, / B, / C), where each service maps to a method (go ()) in a separate Java class (clas…… -
Multithreading – synchronize () suspends the thread
I wrote a DLL library in Delphi, which created multiple threads Let me describe the problem step by step I'm sorry to …… -
Java common interface performance
A simple question, but I guess it's a tricky answer Does using a common interface compromise performance? Example: pub…… -
Java generic type parameters
I have a method that uses list As an argument public static String method(List<?> arg){ // Do something ba…… -
Java – spring singleton has been created many times
I have defined a bean in my spring web application. I want only one instance of this bean. This is my bean definition:…… -
Does Java – IllegalStateException apply to immutable objects?
You throw an IllegalStateException if: >The method cannot complete its work because of the value of one or more fie…… -
Where is setvisible in the Java – NetBeans palette?
I use NetBeans in design pattern to make a GUI I'm looking for a property corresponding to Java's setvisible method, a…… -
Java regular expression, but matches everything
I want to match division * Everything except XHTML I have a servlet to listen to * XHTML, I want another servlet to ca…… -
Returns a list of nodes in a Java node. A parent node can have multiple child nodes
I'm trying to write java code to return a list of nodes in the tree The node class is class Node{ String label; List…… -
How to centralize JavaFX controls
More specifically, why is my JavaFX control not centered? Here are two screenshots. The first one is after the beginni…… -
Java – when to call getwarnings() on connections, statements, and resultset using JDBC?
In JDBC, connection, statement and resultset types all have getwarnings () method, which is specified to generate the …… -
Name conflict in Java import
Unless we change the compiler, Java missed importing x as y syntax, which would be very useful in my case: at this mom…… -
Java – LinkedList – performance decreases with the number of different classes in it
The following code measures the time it takes to call the method handle (object o) 100 times from the interface handle……