包含标签：Java 的文章
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Java – dynamically create groovy classes
Given a class name, I want to dynamically create a groovy class and add properties and methods to it I use to create n…… -
How to embed Base64 images into e-mail using JavaMail
I'm trying to send email from JavaMail using embedded Base64 images (IMG ALT = 'image PNG' SRC = 'data: image / PNG; B…… -
Why is user-defined exception class preferred / important in Java?
When we have system defined exception classes in Java, why do we need to create user-defined exception classes? Becaus…… -
hazelcast – java. lang.NoSuchMethodError：com. google. common. util. concurrent. MoreExecutors. sameThreadExecutor
Try: mancenter-3.1 3. When war is deployed to my Weblogic 12, I receive the following exception Fullstacktrace is: org…… -
Import local Java classes into clojure
I understand the general idea of importing Java classes in clojure, as follows: (import 'a.random.Class) However, supp…… -
Java – does it create a new string object every time I use string?
Suppose I need to iteratively retrieve the value of the same key from Java HashMap for(int i=0; i<INTEGER.MAX; i++)…… -
How can I deny Java fraction? This is a class I created
This is my fraction class code. There are several methods. My requirement is to take the numerator as a denominator: /…… -
Java – draws a smooth color scale and assigns a specific value to it
I am considering a new implementation, a simple 2D graphics matrix, in which the color of the items depends on the val…… -
Java – generate a large stream for testing
We have a web service. We upload files and want to write an integration test to upload a slightly larger file The test…… -
java – inflater. Inflate gives the nullpointer in the adapter getview method Why?
In my Android application, I'm building my first custom adapter. I now encounter a nullpointer in my expanded convertv…… -
Java – avoid using the final method when using mockito for unit testing?
Mockito is not allowed to laugh at the final method I don't want to change the implementation details just to make the…… -
Java code for calculating the number of nights in the date range (00:00:00)
I'm trying to write a Java block to find noon in a specific date range For example: Start date: 05 / 01 / 2014 00:00:0…… -
Java – every environment configuration for Android
What solutions does Android provide for each environment configuration? In the web world, I'm used to c# having config…… -
Java – abstract classes return instances of private nested classes
I want an abstract class A Then I want a class B that can only be instantiated by A No one else can access B – only a …… -
Java – JPanel in jtabbar is not scrollable
Enter the code here. I have the following questions I added two jpanels to a panel and finally added it to my tabbedpa…… -
JavaFX charts, snapshots
I'm trying to get a snapshot of my java popup The Java window looks like: But the snapshot looks like: http://www.dire…… -
Java – akka – implement a custom deadletterlistener actor
I'm trying to add other behaviors to deal with dead letters in akka I think the best way is to implement our own dead …… -
Java – why did this background task fail due to a fatal exception?
The following code in my mainactivity failed with a fatal exception in the overridden doinbackground() method: public …… -
Java – parses strings into integers in the BeanShell sampler in JMeter
I'm trying to parse a string into an integer in JMeter, but I failed due to a follow error If I try to print vars Get …… -
Aggregate function on list in Java
I have a list of Java objects and I need to reduce it to apply aggregate functions, such as through database selection…… -
Generic producers and consumers in Java
I have this method to retrieve objects that are instances of a given class: public class UtilitiesClass { public …… -
Java – why use superclass references for objects?
See English answers > What does it mean to "program to an interface"? 32 public class Musician { public void p…… -
Java version for PMD, findbugs and checkstyle
I need to use PMD, findbugs and checkstyle as development projects in eclipse Is java 6 sufficient to use these tools?…… -
Java – pass some JUnit tests
Is there a simple way to tell JUnit that you only need to pass a certain percentage or a certain number of tests? I ma…… -
The Java compareto() method returns ClassCastException
Suppose I have an employee base class and a manager subclass, which extends employee Now suppose I create an object x …… -
Java – system Setout redirects back to standard output
System. Setout redirects standard output For example, FileOutputStream f = new FileOutputStream("file.txt"); Syste…… -
Can Java throw an empty reference to an exception?
See the English answer > why can I throw null in Java? 7 try { .... } catch (MyException e){ /*Can e be nul…… -
Java – libgdx actor draw overlay
I tried to override my player class, which extends the actor drawing method, but I received an error saying Why can't …… -
Java – speaker recognition using marf
I am using marf (modular audio recognition framework) to recognize the sound of speakers But I don't get the correct r…… -
The lambda expression example does not work in Java 8
I'm trying to learn lambda expression in Java 8 I did install the Eclipse Plug-in and Java 8 SDK, but when I tried to …… -
Java – comparable vs. comparable
I don't see any difference between this default sort method (from Java. Util. Collections) public static <T extends…… -
Java – exceptions to runtime optimization using openjpa MySQL
There must be many questions about this question. I have read some, but the answer is still not found I'm new to JPA. ……