包含标签：Java 的文章
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Java – VTD – XML parsing performance (key factor of speed) Request feedback / comments
I'm about to use VTD XML (in http://vtd-xml.sourceforge.net/ Found), but I'm interested in getting feedback on any act…… -
Java – how to create CSV files using servlets?
I want to download the CSV file from the servlet Data from object [] obj = search getSearch(); I have a data object []…… -
Java – when we change to bytes, why is the result – 2 when 127 * 2?
This is my code: public class test { public static void main(String[] args) { byte a=(byte)127,b=2; byt…… -
Java – rest Service on wildfly pathparam is empty
I am building a rest service using Jee 7 and deploying it on wildfly 8 With the exception of pathparam, everything see…… -
Algorithm – search for the 7th largest element in the largest heap?
So my friend and I don't agree on this issue It requires the time complexity of searching the 7th largest element in t…… -
Java monthly timer
I'm trying to create a timer / TimerTask that will run on the same day of each month I can't schedule a repeat timer b…… -
Java Concurrent HashMap
I want to convert concurrenthashmap to treemap Can I do that? Solution If you need a sorted concurrentmap, please chec…… -
Accessing subclass fields from a base class in Java
I have a base class called geometry, in which there is a subclass sphere: public class Geometry { String shape_name;…… -
Java – refresh the Android viewpager fragment on refresh
I'm new to Android. I really don't understand why the dynamically added fragment content (such as some images added af…… -
How to truncate PostgreSQL tables from JDBC
I have a PostgreSQL database. I want to truncate some tables using JDBC What do I do? This is what I've tried, but the…… -
Detect pending Linux shutdown
Since I install pending updates for my Ubuntu server as soon as possible, I have to restart my Linux server frequently…… -
Java [unchecked] unchecked case warning
Well, I've been looking around and doing a lot of Google searches, but I still can't find a way to avoid this warning …… -
How to use mockito to simulate a for loop
I'm new to mockito My question is how to use mockito to simulate a for loop? For eg: This is the main class: import ja…… -
Java – intentional Android contact information update?
I can use putextra to transfer information as additional data to create a new contact with intent. Can I use informati…… -
How to implement (x POW y) in Java, where x and y are double?
I want to calculate the power of X, y, x, y are double values Why did Java give me a compilation error? What is the be…… -
Get the location from the execution location of the Java code
I have a swing Java application that can save a lot of data (for example, you can consider games and their saving) The…… -
Does Java’s split overwrite the length of the array, even if it is pre initialized?
String [] arr = {" "," "," "}; // String arr = new String[4]; String [] arr = {" "," "," "}; // String arr = new Str…… -
Java: Refactoring static constants
We are refactoring some code We developed a feature in one project and we want to use it in other projects We are extr…… -
Java – calling the run method directly is not a good practice
In most cases, I want to run a piece of code in a new thread, which will take some time, but in some cases, I want to …… -
ORM – primary key – native, sequence or GUID key?
When I read this and this, and then read this (which ironically quotes the other two), I found that I wanted to know h…… -
wsgen vs java2wsdl
What is the difference between wsgen and Java2 WSDL tools? Solution The main purpose of wsgen in Jax - WS RI is to gen…… -
Java – how to attach a byte [] to a list?
How to attach the element of byte [] to list < byte >? Solution With guava, you can use bytes like this asList(b…… -
GWT: how to pass Java arrays to JavaScript native methods?
I have a string array, and now I want to pass it to the jsni function I tried to use jsarraystring in GWT, but I found…… -
Java – how to get the URL of the client
I will request from display JSP to trialshow JSP page, but whenever I call ${pageContext.request.requestURL} on TrialS…… -
Java – automatically in ‘system out. Display date in println() ‘statement
I know that every line you print can be marked with a date (and saved as a log file) For example, in minecraft: [16:21…… -
Java – swingworker – we can call a swingworker from another swingworker instead of EDT
I have a swingworker as follows: public class MainWorker extends SwingWorker(Void,MyObject) { : : } I called t…… -
java. net. Unknownhostexception: Test: Test: unknown error failed to get the local InetAddress of VMID
I'm in spring-jersey 1 C 3p0 is used for connection pooling in restful web services When I started the application, I …… -
Java – store multiple values in the mapping of a single key
I have the following name in C: ght Txt, which contains the following data Id|ytr|yts 1|W|T 2|W|T 3|W|T The problem no…… -
Java – develop a simple ORM
I want to develop a simple ORM that performs crud functions Shold, do I use reflection? Solution Yes, hibernate uses r…… -
Java – JSF – session scope beans shared by browsers on different machines
We have a search form where filters are bound to properties on managed beans (session scope) It is not a component bin…… -
Java – use the base64 class in JDK7
I tried to use the base64 class in JDK7, but the base64 I got could not resolve the error Why does eclipse throw this …… -
Java – finds the second smallest integer in the array
In our assignment, we need to recursively find the second smallest integer in an array However, in order to better und……