包含标签：Java 的文章
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Java – why can’t a class extend a static nested class?
This class: public class OuterChild extends OuterChild.InnerParent { public static class InnerParent { } } Una…… -
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 get files from a resource folder Spring framework
I tried to dissolve my XML file: public Object convertFromXMLToObject(String xmlfile) throws IOException { FileInp…… -
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 – 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 – 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 …… -
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…… -
How do I format the Spanish month in a sentence using simpledateformat?
This is my code: /* package whatever; // don't place package name! */ import java.util.*; import java.lang.*; import …… -
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…… -
Java – prevent SWT scrolledcomposite from eating part of it
What did I do wrong? This is my code excerpt public void createPartControl(Composite parent) { parent.setLayout(new …… -
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…… -
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 …… -
Java – where the result set is stored when using JDBC and Oracle drivers
Once I use JDBC with the Oracle driver and run the select query, do I store the query results in Oracle memory or file…… -
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…… -
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…… -
Java: what is jitc’s reflection on inflation?
I recently came across this interesting word and searched on the Internet to learn more However, the information I fou…… -
Java – unreachable statement: while true vs if true
There is already an answer to this question: > unreachable statement error using while loop in Java 2 while (true) …… -
Java – how to use UUID and Hibernate as fields?
I try to use the generated UUID without @ ID annotation because my primary key is something else Applications don't ge…… -
Java error in bilinear interpolation of 16 bit data
I have a problem using bilinear interpolation for 16 bit data I have two images, Orig image and display image I want t…… -
Separate files for class definition and declaration in Java
I am a C programmer who is currently learning Java. I want to know if OOP in Java follows the same principle as the cl…… -
JavaFX 2.0 WebView / webengine renders web pages to images
I'm looking for a way to load the page and save the rendering as an image, just as you did with cutycapt (QT WebKit ex…… -
Java – Jenkins slave goes offline during the build process
Jenkins slaves were offline during construction How do I solve this problem? I saw many related problems on so and Jen…… -
Why and how does this java code compile?
See English answer > which overload will get selected for null in Java? three public class Riddle { public sta…… -
Javadoc – is there an @ inheritdoc equivalent in Doxygen?
I know Javadoc will compile {@ inheritdoc}, but what is Doxygen doing? Solution There is a clear copydoc, which I thin…… -
Java – what is the “link to editor” function in eclipse?
I'm new to eclipse (and I don't know NetBeans) I'm reading the eclipse tutorial But I was stacked and couldn't underst…… -
Javafx-2 – set fonts globally in JavaFX
How do I set font types globally in JavaFX applications? Is there a solution you can use? In JavaFX 8, the default fon…… -
Java – can two threads access synchronous methods at the same time?
public class Deadlock { public class Deadlock { static class Friend { private final String name; p…… -
Memory usage of byte arrays in Java
See the English answer > java process memory check test2 public class Main{ public static void main(String[] ar…… -
Java string hashcode caching mechanism
Looking at the Java string class, we can see that the hash code is cached after the first evaluation public int hashCo…… -
Why does Java imageio smooth JPEG colors
When I see some JPG files, the color becomes flat This is a simple example. It reads a JPG and writes the same image t…… -
Why does Java allow method void with class name and type
There is already an answer to this question: > methods with same name as constructor – why? 7 Example code: //my cl…… -
GWT and JPA
I'm using GWT 1.5 3. Build database application I use JPA annotations with my objects It seems that the RPC of GWT wor……