Recent Posts
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Example of image distortion effect using Android API
This article illustrates how Android uses API to realize image distortion effect. Share with you for your reference, a…… -
Java 3D game engine?
Recently I entered minecraft, a 3D game made in Java I did several 2D java games without any external libraries or ide…… -
Maximize Java heap space
I try to use a very large square matrix in Java, n = 1e6 or greater Matrices are not sparse, so I don't see many ways …… -
Java – the problem of deleting cookies in servlets
I try to use this code to delete cookies in the servlet Cookie minIdCookie = null; for (Cookie c : req.getCookies()) …… -
Java – combined code generation using eclipse
Effective Java and other sources suggest that we should consider using composition over inheritance I often find mysel…… -
Java – should data sources be defined in the application or application server?
I have developed applications for two different teams (running on the JBoss server) One team has a data source configu…… -
Java – understanding managed beans / backing beans
See the English answer > difference between managed bean and backing bean11 I have some trouble, understand correct…… -
Java – how to make spring cache store ResponseBody instead of intermediate object
I use spring cache and this method to return the query value as JSON: @RequestMapping("/getById") @ResponseBody @Cache…… -
Why can’t the Java 7 and eclipse 3.8 compilers compile JDK code with the new Java 7 Diamond operator?
import java.util.*; import java.util.*; public class SimpleArrays { @SafeVarargs public static <T> List<…… -
Can Java applets use printers?
Java applet can easily print text / HTML to standard printer drivers (all common platforms win / MAC / Linux)? Do you …… -
java. time：DateTimeParseException for date“20150901023302166”
See English answer > is Java time failing to parse fraction-of-second? two LocalDateTime.parse("20150901023302166",…… -
What is the built-in function to find the next maximum prime in Java?
Does the Java API provide a function to calculate the next maximum prime given the input x? Solution This will be a ve…… -
Java casting order
Suppose I have the following settings class A { B foo(); } class C extends B { } // later A a = new A(); C theF…… -
Java – basic histogram in JfreeChart
I need to create a simple histogram using JfreeChart There should be 3 sets of numeric values assigned to these groups…… -
Automatic printing does not work in Java
I have asked to print PDF files in two different ways - one through the web page, the user will see the print preview,…… -
Array – Java ArrayList to kotlin array
Is there an easy way to convert a Java ArrayList into a kotlin array? The following codes: fun test(): Array<String…… -
Java – BlackBerry thread model
I've read a lot of comments and mentioned that BlackBerry threading model deviates from Java standard and may cause pr…… -
Java – eclipse ADT error: unable to run program ADB
On Ubuntu, I just installed the Android SDK ("SDK only") for 64 bit Linux Then I installed the ADT plug - in for eclip…… -
Implement Java util. Random. nextInt
This function is Java util. Random. It returns a pseudo-random int evenly distributed between 0 and a given n. unfortu…… -
Java – memory exception analysis hprof file dump
This is related to this problem java. lang.OutOfMemoryError at android. graphics. BitmapFactory. nativeDecodeAsset(Nat…… -
Java – is there a way to force checkstyle to ignore specific warnings in the source code?
See the English answer > how to disable a particular checkstyle rule for a particular line of code? 5 Does checksty…… -
How does the JavaFX gridpane layout set margins for elements in rows?
I am using the gridpane layout to locate the content in the application I want to know how to set margins for elements…… -
JSF – how to handle multiple submissions before rendering the response?
According to the test report, if the response speed is not fast enough, we may press a button many times, resulting in…… -
Java – why did my string to string comparison fail?
I have an Android application. I want to check whether the installed application name matches the string passed to the…… -
Java – JScrollPane resizes with variable size content
The contents of my resizable JScrollPane have a minimum width If the JScrollPane is less than this width, a horizontal…… -
Java – processing the file name * parameter with spaces through RFC 5987, resulting in “in the file name”
I have some legacy code I'm working on (so I can't just use the URL with the encoded file name component), allowing us…… -
Java – how to set null to integer in spring context
This is only a small part of my background: <property name="a" value="1"/> where a is Integer. How do I set null…… -
Java – modify methods using annotations
How to change methods in Java and what are they doing? I mean, I tried to use comments to do the following code @Anno1…… -
The Java – wicket check box automatically submits its changed value to the domain object
What is the cleanest way I can make a check box automatically submit the form it belongs to in wicket? I don't want to…… -
Java – JPA hibernate – loop in entity relationship – cascade strategy
I have a group of entities connected to each other to form a cycle, that is, the parent entity P has two one to many r…… -
. Net – why do we need iequalitycomparer, iequalitycomparer interface?
The 'equal' and 'GetHashCode' methods exist in the object class, and our type inherits the object base class If we rew……