Recent Posts
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Java – “unable to parse: com. Google. Firebase: firebase core: 9.0.0”
I want to use fire base for authentication in my Android application >I created the application, then downloaded th…… -
How to convert telegraph API core date: int type to Java date?
See English answers > converting long to date in Java returns 1970 11 There is date: int, a ten digit integer with …… -
Java – cannot be in class org apache. log4j. core. layout. Calling factory methods for element jsonlayout in jsonlayout
I tried to log in to JSON format through log4j2 This is my log4j2 XML file: <?xml version="1.0" encoding="UTF-8"?&g…… -
Java – spring boot HSQLDB / H2 always displays “port in use” on Windows 10
I am developing a spring boot application. When I try to run the application using an embedded database (HSQLDB or H2,…… -
Java – the typed method in the jparepository does not return the correct type
I have a method in the jparepository that should return a list of JPA entities: @Entity public class SomeEntity { …… -
Java – extends existing ant path Tags
Can existing path markers in ant build files be extended? For example, I want to expand: <path id="project.classpat…… -
Java – JWT login process and token validation on the server
What is the correct way to verify tokens on the server? I use the JWT token mechanism in my application, which is how …… -
Java – unable to resolve host ”; There is no address associated with the host name
Reading RSS links in my android app, I received this error: In my simulator, I can connect to Google. Com through a br…… -
How to convert date to hexadecimal in Java
I am not familiar with Java. I need to get the current datetime and express it as a string, for example: #1:1357902468…… -
Java – how to stop and start executing a for loop
I'm creating a framework for our project, Before method (use JXL to read the first line) @BeforeMethod public void Tes…… -
Java – after GC applications run slowly
I have an application (game) running on the JVM The game's update logic (run 60 times / second) is complete, about 25%…… -
Why is Java’s exchange Slot cache line fill like this?
When I read the 'false sharing' mechanism in Java, I was in Java util. concurrent. Exchanger. The following code is fo…… -
Java – hibernate does not automatically update the @ elementcollection
According to the book, I update a list of elementcollection, I don't do transition Begin, hibernate will submit automa…… -
Java – Android: how to build dates from server dates
I have the following code to convert the date string returned by the server into a self - string /** * Change date for…… -
Using sockets in Java to communicate with multiple clients
Suppose I have 100 clients in my office I must create an application in which a running main thread is waiting for any…… -
Java – missing application resources
Write Spark Program in Java. The code is as follows: import org.apache.spark.SparkConf; import org.apache.spark.api.ja…… -
Java – without a print statement, the loop cannot see the value changed by other threads
In my code, I have a loop waiting to change a state from a different thread Another thread works, but my loop will nev…… -
How to find an unknown duplicate substring in a string or table Coulmn
I have a large string of numbers as input to the program (I think the sequence name is's'). It can be a string or a ta…… -
Java / parse error Trying to send from Android SDK to parse
This was set for another application a few days ago and works normally. The result was successfully sent to mongolab A…… -
Java – unable to handle the business interface of EJB classes
When starting Maven with test parameters, I got the exception mentioned above When creating an integration test deploy…… -
Java – Import Hadoop source code into IntelliJ
Does anyone know what to do? I read import Maven dependencies in IntelliJ idea But it doesn't work thank you Solution …… -
Java – format spring error message parameters
I have a spring boot web application, and I reject the value in the controller, as follows: @RequestMapping(value = "/…… -
Java – spring starts security, and oauth2 logs off to invalidate the session, so as to complete the authentication and approval cycle in the authorization server
I've been following Dave syer tutorial, SSO and oauth2, Part 5 https://github.com/spring-guides/tut-spring-security-an…… -
Java – the interest calculator does not display results
I try to finish this at the last minute of my java class. When I run the program and ask whether the user information …… -
Java – do string parameters usually escape automatically in Web services?
Today, I found that a simple% of the string parameters passed from the client to the server can lead to an incorrect r…… -
Java thread performance on raspberry pi
The goal of the application is to process 800 concurrent clients through TCP, and each client sends a 3.5kb XML. XML p…… -
Java – parsing tables with jsoup
I'm trying to use jsoup to extract email addresses and phone numbers from the LinkedIn configuration file, each in a t…… -
Java – spring MVC – unable to compile classes for JSP
I'm following the spring MVC course of virtualpairprogrammers. There seems to be some problems with the workspace they…… -
Java – user registration page not verified
<?PHP <?PHP $name = $_POST["name"]; $age = $_POST["age"]; $email = $_POST["email"]; …… -
Multithreading – if there were more threads, would my program get more CPU time?
If the current kernel is scheduling 60 threads, they belong to 3 processes: They are all doing calculations (no disk I…… -
Get the input and output quantity of MapReduce in Java
I want to get the number of inputs and outputs of the map phase and the reduce phase and time of completing the map / …… -
Java – Android HTTP request with client certificate
I'm trying to use this code to make a request to a server with client certificate authentication: try { /*** CA Ce……