Recent Posts
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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…… -
JavaFX – from list to map using java 8
Is it possible to generate hashmaps using streams and collectors? myList.stream() .map(Label::new) .collect(Collectors…… -
Java – web developer wants to learn desktop programming
I am a web developer (Java and cold fusion) who wants to learn to write some simple desktop applications Most of them …… -
How do I send an EOF for a Java InputStream element?
So I have the following code to open the input stream and successfully collect information: httpInput = httpconnection…… -
Java – spring boot 2.1 embedded Tomcat – incorrect keystore password
Update – > add security addProvider(new BouncyCastleProvider()); Solved this problem Adding ActiveMQ broker to my c…… -
Where do I place the comparisons in Java?
I think of this problem over and over again when creating objects that must validate conditions Should checks be place…… -
BlackBerry – use MIDlet Platformrequest() opens the file
Can I use MIDlet Does the platformRequest (string URL) method let the device open the file on disk? I want to use the …… -
Java – Android: firebase search query does not work properly
I'm new to Android application development I created a simple search query to search my firebase database by name (see…… -
Java; Runtime interpretation; Policies for adding plug-ins
I started my first big project It will be a program very similar to Rosetta stone It will be a program for learning a …… -
Can I create a Java UDP socket to listen for all addresses?
I want to have a datagram socket to listen to unicast and broadcast messages Is that possible? Solution By definition,…… -
You want to calculate the average value of the tag, but do not print the decimal point (Java)
See English answer > @ L_ 502_ 0 @ 14 public class NotenDurchschnitt{ public static void main(String[] args){ …… -
Java – implementation is also overridden
I added spring security to my application and encountered a problem My userdetails implements org springframework. sec…… -
Multithreading – * * * glibc detected * * * double free or corrupt (fasttop):
The clear call to qbytearray generates the following exception: *Glibc * / home / Yan / fps2 / fps2 detected: double f…… -
How will you implement a secure static login credential system in Java?
We recently conducted a security audit and exposed some weaknesses in the system here One of the resulting tasks is th…… -
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…… -
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: double to float type is converted to a larger value to give ‘infinity’
Suppose I have a variable of type double with some random large values: double d = 47867778678678686546746783467347634…… -
What else must you master besides framework and Java syntax?
In addition to learning Java, spring, hibernate, servlets, JSP, how to use eclipse / NetBeans, MySQL / Oracle / Postgr…… -
Java – print all strings from the list by passing in a char variable
I need to print all strings in the list by passing in a char variable When I have something I like, for example, I pas…… -
Java – why can’t I get filechannel from filewriter?
I wonder why getchannel is only implemented in fileoutputstream instead of filewriter Is there any real reason? Is the…… -
Java – beansbinding, jgoodies binding, Jface or glazed list?
I started to investigate beans binding and my head began to rotate There are many options, but this is a core design d…… -
Sun training for sun certified Java programmers (scjp) – classroom or web based?
Has anyone had sun training experience? What are the advantages / disadvantages of the two kinds of training? -Goe Sol…… -
Java – simulate / test core objects in my system
I was asked to change some classes that are core to the system we work on Each problematic class needs 5-10 different …… -
Java – how to determine the controller (spring) for a given URL
How to use spring defaultannotationhandlermapping to find the controller that will eventually process the given URL I …… -
Java – how to encrypt the password of jconsole password file
I am using jconsole to access my application MBean and use password Properties file However, according to sun's specif…… -
Java – how to use timezone to parse datetime without t or nanosecond
I am trying to parse the date time string in the following format: 2019-02-22 19:29:43+00:00 I am following this guide…… -
The Java 8 stream cannot resolve variables
I'm new to Java 8. I want to refactor this code and convert it into more Java 8 styles, for (RestaurantAddressee Resta…… -
Java – do calls to thread safe functions also need to be synchronized?
If I am using concurrenthashmap (where put is thread safe) and I provide a common function myput using concurrenthashm…… -
Java – the following code is thread safe
I have a scenario. I must maintain a map that can be filled by multiple threads. Each thread modifies the correspondin…… -
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…… -
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……