Java
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MediaPlayer. Java. In the displaying () method lang.IllegalStateException
public static MediaPlayer mp=null; public static MediaPlayer mp=null; public static void playGeneric(int name,final Im…… -
Use “this” and method (in Java)
What about using the "this" method in Java? Are there selective or mandatory situations? The only thing I encountered …… -
Does Java – Maven dependency plugin use the same other types of artifact resolution as other mavens?
If I use the Maven dependency plugin, I cannot use the version range In addition, it seems that the version of a defin…… -
Java EE – compare openejb with GlassFish
Can we replace GlassFish with Tomcat / openejb for lighter applications? What are the limitations of openejb instead o…… -
Java – notificationlistenerservice: NullPointerException on getactivenotifications
According to this tutorial, I try to implement notificationlistenerservice in my application: http://www.kpbird.com/20…… -
How to call C from Java?
I want to call a C method from Java I read about JNI, but I didn't get how to get all the library files. I should keep…… -
Java – Reference “this” when calling the super constructor?
I have a Class A and write a subclass B. only one constructor is parameterized B must call this super constructor of A…… -
java 7 uuid bug？
I believe I may have found a UUID multithreading error in Oracle java7 update 5. I wonder if anyone can confirm it wit…… -
Java – how do I get a subclass recorder?
I have a subclass and a superclass In superclasses, I have a way to record something When I create an instance of a su…… -
Java – nested bounded wildcards
When I try to compile the following code: LinkedList<List<? extends Number>> numList = new LinkedList<L…… -
Java – vector graphics in IText pdf
We use iText to generate PDF from Java (based in part on the suggestions on this website) However, embedding an image …… -
Java – forces JTable to model “commit” data while still in edit mode
I have a JTable as follows Therefore, when JTable is still in edit mode (a keyboard cursor flashes in the divide colum…… -
Java – random and uniform distribution
I know that if I use the random generator in Java and generate numbers with nextint, the numbers will be evenly distri…… -
Java – what is the difference between length and length?
See English answer > length and length () in java7 arrayone.length; However, for things like array lists or strings…… -
How to get the root node attribute on Java
I have an XML file, as shown below I want to get the latitude and longitude attributes of the pharmacy node I can get …… -
Java – use add () in the fragmenttransaction addToBackStack(),add(). Detach() and replace() What’s the difference between addtobackstack()?
In the FragmentTransaction project on Android docs, the method replace () is described, which is the same as calling t…… -
Java – how do I map spring MVC controllers to URIs with and without trailing slashes?
I have a spring controller with several requestmappings with different URIs My servlet is "UI" The servlet's base URI …… -
Bring components on JPanel to the front end (Java)
In VB, you can use zorder Before you ask, no, I didn't use the layout manager in this case If you have two components …… -
Switch scenes in JavaFX
I have a problem closing the current scene and opening another scene when selecting MenuItem My main stage codes are a…… -
The best way to merge and remove duplicates from multiple lists in Java
I have a situation where I will receive 2 ArrayList < widget > I need to be able to merge all lists and delete a…… -
Java – Apache wink and Apache CXF jax-rs implementation
Why does Apache have two implementations of jax-rs? CXF seems to be a huge bundle, including Jax WS and Jax rs. blinki…… -
Java – use JNA to link to a custom DLL
How to access customization using JNA lib / . DLL function? thank you. Solution Example (from Wikipedia): import com.s…… -
Sparksql and explode on dataframe in Java
Is there a simple way to use array column explosion on sparksql dataframe? It's relatively simple in Scala, but this f…… -
Java – added = = confused behavior
There is already an answer to this question: > integer wrapper objects share the same instances only within the val…… -
Java – continue to develop plug-ins
There is an Eclipse Plug-in managed by maven, which contains the following configurations: <project xmlns="http://m…… -
Java – sqlitedatabase multi thread locking mode
I use this class to manage connections to the underlying SQLite database public class BasicDataSource { protected…… -
Java – string decoding UTF-8
How do I decode a UTF-8 string on Android? I tried to use this command, but output the same input: URLDecoder.decode("…… -
Java – transaction. In hibernate What is commit()?
transaction. What does commit () do? Account account = new Account(); account.setId(100); account = (Account) session.…… -
Java: the difference between collections and “data structures”
In Java, I don't understand the relationship between sets and "data structures" In my opinion, set refers to list, set…… -
Java – automatically generate source code and document jars in NetBeans
Is there any way to automatically generate source code and Javadoc jars in NetBeans? Ideally, I want to put my source …… -
Java – the contents of the window disappear when minimized
I have a simple class that draws a line when the mouse is dragged or a point when the mouse is pressed (released) When…… -
How to extract dates from UUIDs using Java?
How to convert UUID to date format 2011-04-22? For example, I have such a UUID 118ffe80-466b-11e1-b5a5-5732cf729524. H……