包含标签：Java 的文章
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Distributed cache with expiration control in Java
The requirement is to cache a large number of (100000 to 1000000) small objects and control the expiration of a single…… -
Java – same day from this year
I need it on the same day this year Example: now it is 2019, and the variable contains the value July 15, 2022, so I n…… -
Java – how to find enumerations of class definitions?
I know that I can get public static members of a class in the following ways: obj. getClass(). getFields() But that di…… -
Java – parses user input about search criteria
I'm looking for a way to parse some user input The input should show which searches must be performed and how they mus…… -
Java – how to divide an ordered list of integers into sub lists of uniform size?
Does anyone have a good algorithm to get an ordered list of integers, that is: In a given number of ordered sublists o…… -
How to use reference methods in unaryoperator Java 8
At present, I have an unaryoperator like this UnaryOperator<Object> defaultParser = obj -> obj; I don't know …… -
Splitting strings in Java streams
I have a POJO product List<Product> list = new ArrayList<>(); list.add(new Product(1,"HP Laptop Speakers",…… -
Java connection pool without JNDI?
I have a connection pool to access MySQL database from servlet I use JNDI to get the data source. JNDI is in my meta-i…… -
Java – authentication fails and a message is displayed using Google’s firebase UI (Code: 10 message: 10)
I made a chat application using firebase real-time database I want to note here: I added SHA1 fingerprint How can I so…… -
Is it feasible for Java to check locking by forcing synchronization twice?
I've read everything about double check locking fixes that will never work. I don't like delayed initialization, but i…… -
Java generalizes methods to validate nulls in object parameters
I'm trying to implement a logic. I have a POJO class with 7 properties The following is the implementation Map<Stri…… -
java – PrintWriter. Printf and printwriter Differences between format methods
Is there any difference between the Java printwriter method printf and the format? The document says printf is a conve…… -
Java 8 streams finds the element and adds it to the beginning of the new list
I wonder if I can use the Java streams line to solve this problem: I need to find a string in the string list and crea…… -
I / O priority in Java
I want to use the vista feature of I / O prioritization Is there a platform independent way to set the I / O priority …… -
Java – why call a method call that takes a parent class as a parameter instead of a method that takes a child class as a parameter?
I have a class named a and a class named B, which extends a public class Main { public static void main(String[] a…… -
How does Java – class object relationships work?
What happens when we create an instance of a class? I mean, every field and method of the class will be inside the obj…… -
Java – how to copy “show tables” in Hibernate?
I'm trying to iterate over all my tables, so I can truncate each table (at the beginning of each jbehave test) I thoug…… -
Java – Generic ChangeListener
Scenario: I have a container object that contains a mixed object package. All objects inherit from the mycontainerdobj…… -
Comet programming and ASP net
If an event occurs on the browser, I want to push the data to the user's browser We can do this using commet programmi…… -
How to correctly format SOAP message envelopes using a custom soaphandler
I have a class that implements soaphandler interface Handlemessage is defined as: public boolean handleMessage(SOAPMes…… -
Java – represents Association and inheritance in UML
If I have a class definition similar to the following: class A extends class B { private B b } How can I express this …… -
Java – I use generics, but not this class!
I tried to use Google collections to call this method to connect two arrays public static <T> T[] concat(T[] fir…… -
Java – hibernate – entity manager factory
I recently encountered a problem that my web application can't start normally, and the stack trace can't tell exactly …… -
Java – how to get enumeration values from attributes
I have an enumeration with values valid and invalid, which has Boolean attributes associated with it I want to get the…… -
Java – how can I guarantee to send a “stay alive” heartbeat?
We have an RMI client application written in Java that needs to send "keep alive" messages to the server application r…… -
Java – deploy spring based war and externalize its jar dependencies
I have a spring application that has many dependencies (18 megabyte jar files..) – Now, when I test on a remote Tomcat…… -
Java – eclipse – sonar s2629 may have false positives with new strings
I'm using the latest eclipse and sonar plug-ins Record the following lines in answer: log.debug("Request body: {}",new…… -
How to use helvetica in Java?
Helvetica is available in one form or another on windows, Mac OS X, and Linux Under windows, I can see it from Microso…… -
Java – how do I add an array in the middle?
I try to create a method named insertat, which accepts three parameters (int index, int n, int value). If I call: Int …… -
Java development standards and tools (compared with c#)
I don't know anything about the Java platform. I want to know what tools (and methods) can be used to help develop mai…… -
Java – the best design to decompose business logic and data layers when they appear to overlap?
I'm building an MVC web application (using the spring MVC framework), and I'm a little confused about the best way to …… -
Java – how do I combine two streams?
I'm trying to learn / understand the flow in Java and have this Code: List <Tag> tags = (classA.getTags() != nul……