Recent Posts
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Java – vertx Web: where do I put the Webroot folder?
It should be easy, but not so far I've been using vert X 2 and recently switched to vert x 3. I thought I would try a …… -
Print an integer with 2 decimal places in Java
In my code, I use integers multiplied by 100 as decimals (0.1 is 10, etc.) Can you format the output for me to display…… -
Java is backward compatible, but why do we need to upgrade many libraries when we upgrade the JDK from 1.6 to 1.8?
Recently, I upgraded the JDK version from 1.6 to 1.8 in a java project However, there are some compilation or runtime …… -
Java – how to query the values of columns set in parse as pointers to other tables
I use parse as my application. I want to query a table in which columns are set as pointers to other tables This is a …… -
java – Hibernate：org. hibernate. hql. ast. Querysyntaxexception: unexpected token
I use hibernate. I have this query: List<Person> list = sess.createQuery("from Person").list(); With this statem…… -
Java – jooq and transactions
I've been reading about transactions & jooq, but it's hard for me to see how to implement it in practice Suppose I…… -
Java – why does jodatime and calendar return different results
Why did this test fail: DateTime dateTime = new DateTime(1997,01,00,DateTimeZone.UTC); long jodaMills = dateTime.g…… -
Java – get an exit instruction from the library
To my surprise and fear, I just met system Line of exit (1); In the library I use I'm planning to contact the author o…… -
Java – how can I fail Hudson / Jenkins if the sonar threshold is broken?
I'm using Maven to build my java application. Jenkins provides metrics for CI and sonar At present, I have a construct…… -
Java – deserialize immutablelist using gson
I use a lot of immutable collections, and I'm curious about how to deserialize them using gson No one answered. I foun…… -
Java programming environment: Emacs or eclipse?
I'm new to Java. I need to build a programming environment (edit, compile, test, debug and deploy / make jar files) Th…… -
java – Class. Field order returned by getfields()
Class. The Javadoc of getfields () said: "the elements in the returned array are not sorted, and there is no specific …… -
How to set java system properties globally on OS X?
Short stories I need a system level approach to Java awt. The headless property is set to true for all Java calls That…… -
Check whether the fastest method in string can be resolved to double in Java
I know there are a million ways to do this, but what's the fastest? This should include scientific notation Note: I'm …… -
How to get the unique ID of each object in Java?
See the English answer > how to get the unique ID of an object which overrides hashcode()? 9 It should be object an…… -
You can (and how to) use javax in EJB modules naming. Context #lookup find CDI managed beans?
Yes (if so, how?) Using javax. XML in EJB modules naming. Context #lookup find CDI managed beans? I use GlassFish v3 I…… -
Java – parse manifest.xml in jar What is the correct method for entries in MF files?
Manifest.jar included in many Java jars MF contains headers that look like headers See example [*] I want something th…… -
Java – how to get files from a resource folder Spring framework
I tried to dissolve my XML file: public Object convertFromXMLToObject(String xmlfile) throws IOException { FileInp…… -
Java – why can’t a class extend a static nested class?
This class: public class OuterChild extends OuterChild.InnerParent { public static class InnerParent { } } Una…… -
Replace all substrings that appear in the string – is this more efficient in Java?
I know two ways to replace all substrings in a string Regular expression (assuming that "sub character substitution" d…… -
Java – a good working example of selenium 2 and webdriver
I've been using selenium 1, but now I want to migrate to selenium 2 / webriver To be honest, I find it a little diffic…… -
Java – Apache nutch – path problem
I tried to set Apache nutch to grab the URL and follow this guide As an old guide (this guide is 1. X, I use 2.3), I h…… -
Guava’s immutablelist Is the builder thread safe?
Guava’s ImmutableList. What is the thread security of builder? Javadoc doesn't say Solution Although guava invariant c…… -
How does Java embed virtual function boundaries?
I am reading some materials to explain whether Java can be faster than C, and I encounter the following quotation: "Ja…… -
Multithreading — is it safe to call multiple threads of DLL function in a single application?
I write a server application in Delphi 2009 to realize several types of authentication Each authentication method is s…… -
Java – why do some xhdpi phones only display images in / RES / drawable?
This is a scene There are folders: Drawable LDPI > drawable MDPI > drawable hdpi > drawable xhdpi Images (usu…… -
It’s slower than the sum of Java
This is the case cat sum100000000.cpp && cat sum100000000.java #include <cstdio> using namespace std; …… -
Java – in Apache POI 3.7, double values are written in numeric cells in a specific format
I need to write a double value in a numeric cell in a specific format. I mean, the generated XLS must have a numeric c…… -
Java – how to use the eclipse generated WebService client class?
I use eclipse Helios to create a web service client to consume an axis 1.4 web service The internal client package has…… -
The fastest way to write integer arrays to files in Java?
As the title says, I'm looking for the fastest way to write integer arrays to files Arrays vary in size and can actual…… -
Bitmap explanation of Android image cache (I)
Foreword: I'm going to study the picture caching framework recently. Based on this idea, I think I'd better understand…… -
Main framework of Android imitation Baidu wallpaper client (I)
This is a good tutorial. I took it out and shared it after I learned it. I wanted to write a post, but I found that it……