包含标签：Java 的文章
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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. …… -
Java – information about @ inject in CDI / weld and di / Guice
I tried to distinguish between (some) CDI and di About @ inject, CDI (jsr-299) only brings di (jsr-330). What is it? C…… -
Java – lists implementations that do not resolve casts
I created my own array - based list implementation, and it doesn't limit invalid parameters If I use cast to create my…… -
Time zone in Java – webapp
I want to know the best practices for dealing with time zones in web applications >When user1 adds a new date, it i…… -
What does the name of an object in Java mean (array, ArrayList)
See English answers > java arrays printing out weight numbers and text 10 ArrayList<Integer> myList = new Arr…… -
Java – constructor printwriter (bufferedwriter) undefined
I'm trying to create a report that I show syntax errors be used for: new PrintWriter(new BufferedWriter(new FileWriter…… -
Java – JPA and first level cache, what’s the point?
Entitymanager maintains the first level cache for retrieved objects, but if you want to have a thread safe application…… -
Java – call thread What kind of corruption may occur when the stop method is used?
See the English answer > thread Stop () – deprecated 4 I just don't quite understand What does an inconsistent stat…… -
Java – packed numeric array
I have a large array (~ 400.000.000 entries) with integers of {0,1,..., 8} At present, I use byte array and save 2 num…… -
Java – how to add data in a list item in Android
I am a new Android Developer I am developing a sample application I want to add some data to the object list My mainac…… -
Java – close a runnable joptionpane
I have this runnable window: EventQueue.invokelater(new Runnable(){ @Override public void run() { op =…… -
Java – runtimeException: the buffer is insufficient to hold pixels
I received a bitmap in the byte array through the socket, I read it, and then I want to set it to OS. In my applicatio…… -
Java – unrecognized propertyexception when reading yaml file
When using the dropwizard, My dropwizard service reads config YML file public void run() throws Exception { this.r……