Java
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Java – display buttons at specific coordinates
How do I display the (x, y) of a button or JButton window at a specific coordinate? Solution Although you can use setl…… -
java – MediaPlayer. Create() always returns null
I've used a media player before and I've never encountered this problem Whenever I try to use mediaplayer When create(…… -
Java error message “cannot resolve to variable”?
OK, so I have something new about Java. I'm trying to create a class that can ask the user to enter a 12 bit UPC code,…… -
The correct way to access read-only mapping synchronously in Java
I'm writing a simulation of the databaseconfiguration class, which reads the configuration from the database. I need s…… -
Elusive JAVA memory leak
I have a Java application based on lwjgl I render terrain with nine vertex buffers arranged in a 3 x 3 mesh When the c…… -
Java – can the modified quicksort be the best case of O (n)?
It is generally believed that the best case for quick sorting is O (nlogn), because each partition of the array is abo…… -
Java JPA implementation – how to read / set properties?
I'm reading the book beginning Java ee6 platform and GlassFish 3. I have some trouble understanding the access types o…… -
Java – how to dynamically add projects to listview in Android
Who can help me? I'm trying to create a listview in Android, and I'm trying to load the project into it using code (no…… -
The CTRL space completion of Java – Eclipse: main is no longer valid
I use eclipse (3.7.1), and I like Ctrl space autocompletion It was once used to generate static public void main (stri…… -
Java – how do you call the paint method in the Applet extension class?
I have two called paintme Java and starter Java class file import java.applet.Applet; import java.awt.*; public class…… -
Why are there exceptions to the following java code?
Why do I get exceptions Exception in thread "main" java.lang.ClassCastException: [Ljava.lang.Object; cannot be cast to…… -
Java – string foo = “bar” and string foo = new string in Android (“bar”)?
I searched for this, but the keywords must be too generic to narrow the relevant bits Why are both ways of declaring s…… -
Java and C 11 volatile
I want to port some code from Java to C 11. I'm confused about volatile keyword I'm not familiar with the Java languag…… -
Symfony – complex doctrine2 query with optional parameters
I want to know the best way to query the database with optional parameters For example, I have a search, its name, loc…… -
Java – Jfilechooser in JPanel; How to let users choose
The default Jfilechooser works, but what I don't like is the fact that it pops up I'd rather have a GUI where all the …… -
Java – why doesn’t JPA automatically generate an ID for my row?
I want to use the sequence policy to automatically generate IDS, but I'm breaking my mind to make it work I have no id…… -
Java – how do you share a low-level utility class between packages without exposing it to a public API?
I have a library project. I want to restrict the public API, but I also have some low-level utility classes that are s…… -
Java me – is there a way to run J2ME (jar / JAD) programs without using the Sun Java wireless toolkit or any ide of J2ME?
I want to run my j2me program (jar / JAD) on my computer without using any ide or Sun Java wireless toolkit or somethi…… -
Format string in Java, in bytes
Suppose I have a string containing non ASCII characters in Java, I want to use string Format () so that the formatted …… -
Where can I download JRockit for Java 1.5
I checked the download page http://www.oracle.com/technetwork/middleware/jrockit/downloads/index.html , but only the J…… -
Generic / interface and tree structure in Java
I'm trying to create a tree structure (binary tree) that can accommodate two different types of classes (a sphere and …… -
Java – an effective way to parse the following strings?
I get the following response from the server as a string value_ One = 3342342& amps; value_ Two = 4563445& amp…… -
The compressed (zipped) folder is not a valid Java folder
I'm trying to use zipoutputstream to compress files from the server into a folder sourceFileName="./file.txt"' …… -
Java – JPA / Hibernate has too many increments for Oracle sequences
I use hibernate on my java project. I have Oracle dB For an ID column, I determine a sequence with an increment of 1 B…… -
A good java (Tomcat) soap Library
ANSVER： I have to develop a client / server system that uses Tomcat (6) as the server and the client created in C # T…… -
Java – how to write a method that accepts stacks and queues?
So I wrote this very big method If you give it a stack, it will return a stack If you give it a queue, it will return …… -
Java – error creating bean in quartz scheduler
I changed the quartz library from version 1.5 2 is changed to 2.1 2. Using its old version, the project runs and works…… -
Multithreading – why can’t signals / slots work with multiple threads?
class A : public QObject{ class A : public QObject{ Q_OBJECT signals: void a_sig(); public: A(){ } public sl…… -
In Java, enumeration What do you mean?
What is enumeration? > meaning? Is there any way to represent general purpose? Solution <？> Syntax is Java's…… -
What is the reason for setting the minimum Java heap size?
I can set the minimum and maximum Java heap size by passing the parameters - XMS and - Xmx respectively@ H_ 403_ 7@ So…… -
Java swing GridLayout vertical constraint
Can I add components in GridLayout vertical? I mean, the next one is higher than the previous one? thank you Solution …… -
Simple java Pokemon extinguishing simulator
I wrote a class to create and fight Pokemon, but I couldn't figure out how to call the battle method in the tester cla……