Java
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Java – set ehcache replication – what multicast settings are required?
I am trying to set up ehcache replication as follows: http://ehcache.sourceforge.net/EhcacheUserGuide.html#id.s22.2 Se…… -
How to determine whether the obtained Java resultset is empty?
Class.forName("org.sqlite.JDBC"); Class.forName("org.sqlite.JDBC"); Connection conn = DriverManager.getConnection(…… -
Java – Tomcat auto shutdown
I use Apache and Tomcat on the windows server. Since this morning, Tomcat has stopped working without any logs It does…… -
Java – how does caching work in jax-rs?
Suppose I use the @ get method to make the following web service calls: @GET @Path(value = "/user/{id}") @Produces(Med…… -
Java – use scl010 to obtain the uid of Mifare Ultralight
I want to get the uid of Mifare ultralight NFC tag TerminalFactory factory = TerminalFactory.getDefault(); List<Car…… -
Java – polymorphism and constructors
I'm a java student. I'm taking an exam When I encounter this problem, I don't understand the answer: Consider the foll…… -
Java – how to use hibernate Properties file instead of hibernate cfg. xml
I'm trying to connect to a DB in a servlet using hibernate I have read that we can use hibernate cfg. XML or hibernate…… -
Java – how to use libgdx to move sprites using keyboard keys?
I've just started using Java and libgdx, and I have this code. It's very simple. It will print a sprite on the screen …… -
Java – how to match the key value pairs of the map using mockito?
I need to send a specific value from a mock object based on a specific key value Specific category: map.put("xpath","P…… -
Java – randomly “walk” near the center of a limited area
I don't know if I can correctly express this problem, but here I want to write an example where the dots have a speed …… -
Java – is there any way to play in app products from the back-end server using Google?
Consuming Google play in app goods can be easily from client applications（ http://developer.android.com/google/play/b…… -
Java – SWT invalid thread access on Mac OSX (eclipse Helios)
I have the simplest of all simple SWT programs (it doesn't even show Hello World): package com.samples.swt.first; imp…… -
Java – stop JPopupMenu stealing focus
I have a jtextfield, and I want to suggest that the results match the user's input I show these suggestions in JList i…… -
Java – classes generated using JAXB are used for elements that require integers with patterns
An element in my XML schema is defined as follows: <xs:complexType name="MyNumberCodeType"> <xs:sequence&…… -
Why can’t Java tell me when I can’t use integers?
For a small project (question 10 Euler), I try to sum up all primes less than 2 million So I use a powerful method to …… -
Why does Java’s InputStream Close() will block?
My java program uses processbuilder (redirecterrorstream is set to true) and has a loop to run the read method of the …… -
How to use BigInteger class to implement an unsigned 64 bit int in Java?
I'm looking for a data type with an exact capacity of 0 to 2 ^ 64 – 1 We know that Java does not support 'unsigned' re…… -
Java – Orient DB slow write
The official website of orientdb says: However, executing the following code can show that it takes 17000ms to insert …… -
Java – JNDI lookup of EJB3 in ear file on GlassFish
I have an ear file containing a large number of jars, one of which contains local session beans (EJB3) I need to perfo…… -
Java – @ bean is different from @ Autowired
Why can't I use @ Autowired in this case @SpringBootApplication public class Application { @Autowired Booking…… -
java – org. apache. jasper. Jasperexception: function tests must be used with prefixes when no default namespace is specified
I am using the following for my project: @Component @Scope(value = "singleton") public class TestBean { public voi…… -
Java – how to integrate BeanShell
I am developing a Java based component game engine. Now when I make changes to the component to be rebuilt and restart…… -
Force java to release all file locks / handles in Java
My java application (which is quite a lot of code) performs a lot of file operations In my application, I need to move…… -
Java – how to receive the content sent by convertandsend?
I am reading the Spring Framework Reference chapter on JMS integration There are some examples of sending text message…… -
Java – why does my swingworker thread continue to run until execution is complete?
I am implementing the GUI for the console application, and I need to perform some operations (for example, parsing XML…… -
Java – eclipse – TestNG refers to the nonexistent project XXX and starts the configuration
When I try to run a test as a TestNG suite, I get a very cryptic error message indicating that TestNG cannot start bec…… -
Java – keytool – genkey error: keystore file does not exist
I try to create a new self certified keystore file The commands I use are: keytool -genkey -selfcert -dname "cn=My Nam…… -
Java – a graphical tool like hpjmeter to view the – agentlib: hprof analysis output
What tools are available to view the output of the built-in JVM Analyzer? For example, I am starting my JVM: -agentlib…… -
Java – use org. Org JSON parsing JSON
I tried to parse the output of a server, which looks like this: { "GetFolderFilesByZoneResult": [ { "ID": …… -
Java – eclipse can have multiple output folders like multiple source folders
I have an eclipse project that has two source folders – 'SRC' and 'test' I want to build from these two folders into a…… -
How do I use regular expressions to get a second matcher in Java?
See English answers > match at every second occurrence VA-123456-124_VRG.tif I tried this: Pattern mpattern = Patte…… -
Java – how to get publickey object from EC public key byte?
I am developing an application. I need to verify sha256withecdsasignatures with the help of secp256r1 (NIST p-256, p-2……