Java
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Java – the fastest byte array connection method
I get a mapping containing the N part of the message as a byte array After the last article enters the map, you must c…… -
Java assignment static variable
When I assign the value of a static int to another int, it performs the assignment in an order that does not seem to f…… -
Java – why count less or even use the synchronized keyword?
I began to learn some Java concurrency concepts public class Count { private int count = 0; public synchroni…… -
Use Apache POI in Java to read integers from numeric units
I have an application that uses Apache POI to read the XLS table When a cell has a value, I use row getCell(i). Getnum…… -
Java – how to use twitter4j to retrieve images in tweets?
I want to issue a query for a keyword or topic tag and retrieve all images from all tweets containing that keyword I c…… -
Java – sharing constants in multiple classes (Android Minesweeper)
I'm using the extended button to create an instance of a class and access integer variables directly for better perfor…… -
Mapping – dozer, instantiationexception on custom converter
I wrote my own customer converter: public class MyFancyCustomConverter extends DozerConverter<Integer,AnObject> …… -
java – System. Does the out object belong to system class or printstream class?
I'm a novice in programming and just started learning Java I'm curious, object system Does out belong to system class …… -
Java – use play 2.0 X for permanent redirection
I want to know how to play in the framework 2.0 X to permanently redirect the subdomain 301 Solution Global object wil…… -
Java – how do I know if my phone is charging
I need to know (through my app) whether the Android device is charging Any ideas? thank you Solution One thing I found…… -
Java – what are the uses of objects of type object
I saw the code below the exercise in the scjp book Object obj = new Object(); First of all, I think this may be a mist…… -
Collision detection between two rectangles in Java
I have two rectangles, a red rectangle (movable) and a blue rectangle When a collision occurs between blue and red rec…… -
Reduce map using java 8 stream API
I have a map of the following table: Map<Integer,Map<String,Double>> START Make inner an internal map, i.e…… -
java – JDK 1.4. 2 “contains (charsequences)” method in string class
In Java 1.5, the contains (charsequences) method was added to the string class This method How would you do this in Ja…… -
java – Jersey：com. sun. jersey. spi. inject. Errors $ErrorMessagesException
I'm having trouble using the Jersey (1.8), Maven and hibernate I received this error (full log) INFO: Scanning for roo…… -
Java NullPointerException for null condition check
I have a very basic method as part of the binary search tree. If the current binary node has a correct child node, it …… -
Base-n series generator for a given number in Java,
I want to create a program to generate a given base-n series, Is there any general mechanism to find these numbers so …… -
Which simulates the optional parameters in Java better?
I have a Java method with three parameters, and I hope it also has the fourth "optional" parameter I know that Java do…… -
Java program for factorial incorrect output
I execute the following java code in the eclipse ide public class Programs { public static void main(String[] arg…… -
Java – make jlabel disappear
I am writing an application to perform a task and notify the user when the task is successfully completed Inform the u…… -
Java – order and difference between HashSet and JDK 7 / 8
This is a two-part question: >Whether HashSet implements some hidden sorting mechanisms, or just references documen…… -
Java string format
I have a property file containing strings in the following format: audit.log.events.purged=The audit events were purge…… -
How do I force two Java threads to run on the same processor / core?
I want a solution that does not include critical parts or similar synchronization alternatives I'm looking for somethi…… -
Java 8 – restrict the flow of the first object and convert it to a specific object?
I used earlier: List<Person> person = UserDB.getUserDetails(); Person p = person.get(0); // index of first posit…… -
Java – how to use regular expressions to check whether HTML documents contain non empty script tags
I try to check whether an HTML document contains script tags that are not empty using regular expressions Regular expr…… -
The best way to translate this java code into kotlin
URL url = new URL(urlSpec); URL url = new URL(urlSpec); HttpURLConnection connection = (HttpURLConnection)url.openConn…… -
Duplicate code blocks in sonar for import statements in Java
On sonar 4.5 6 (default setting), I see the message duplicated blocks as The Java code of the message I received is as…… -
Java – converts two Boolean values to int
This can be very easy If I have two Boolean values a and B, how can I get the equivalent "binary" number? false and fa…… -
Java – refactoring a simple populated long method
I'm refactoring a method with more than 500 lines (don't ask me why) @ h_ 403_ 7@ public List<Hashmap> getProduc…… -
Java – why does my jdialogs leak?
I have a JFrame from which I open a jdialog and another jdialog – menas from the dialog. I have three windows visible …… -
Java – Tomcat server timeout in eclipse
I encountered a Tomcat server problem in eclipse I received the following timeout error: Server Tomcat v7.0 Server at …… -
Combining functions and predicates in Java 8
In the isbigorder method, if the total price of the products in the order is greater than 1000, it must return true Ho……