包含标签：Java 的文章
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java – Scala：String“”vs“”
I am a newcomer to scala. I have seen the code for connecting strings in Scala, as shown below: "test " ++ "1" And I'v…… -
Using zxing to read QRcode in Java
Some questions about using zxing I write the following code to read the barcode from the image: public class BarCodeDe…… -
Setting the file creation timestamp in Java
I know that setting the creation timestamp does not exist in Java because Linux does not, but is there any way to set …… -
Java – how to send cookies with selenium webdriver?
Every time I run my test, the first step is to log in, not I get to the page If you run this test, the login operation…… -
Java – JSF CDI: dialog scope bean [S] best practices
I am currently learning JSF 2.0 and am very happy with the existence of this session scope function, which is very use…… -
Where to place I18N key strings in Java
When Internationalizing in Java, you can assign a string key to each message What are best practices and where to plac…… -
Java – how to generate JList with alternating colors
How do I get an alternate color JList in Java? Any sample code? Solution To customize the appearance of JList cells, y…… -
If a host is lost, the datastex Java driver will not connect
If I am not wrong, I can connect to a Cassandra cluster, know that there is at least one node in the cluster, and then…… -
Java – how to get the depth of the current node in JTree?
I have a JTree with several nodes and children When I click on a node, I want to know its depth (0,1,3) How should I k…… -
Java – Eclipse: is there any way to force import in organize import to resolve ambiguity?
I use eclipse. Com on Android projects I updated to the lion, the problem began to appear... Try something for a few h…… -
How to write good Javadoc comments?
I am a java developer. I am interested in improving the quality of my Javadoc comments in the code and programs I writ…… -
java – NoSuchMethodError：org. slf4j. helpers. MessageFormatter. format
This error occurred while running my application: [ERROR] Apr 12,2013 10:18:56 AM com.google.appengine.tools.developme…… -
Java – how to insert batch generated keys from JDBC into oracle?
I use JDBC to batch insert many records I'm using Oracle jdbc. OracleDriver final String insert = "Insert into Student…… -
Java – why does hashcode () return the same value for an object in all successive executions?
I try some code about object equality in Java As I read somewhere Now I have a sample program that I run 10 times in a…… -
Java – @ before method in testrule is not called
I implemented a JUnit 4 testrule (extending an externalresource) and injected it into my test class as a @ classrule: …… -
Java – how to reduce short circuit on stream?
Suppose I have a Boolean stream and the reduce operation I write is 𞓜 (or) Can I write in such a way that if I encount…… -
Java – how to map maps
I tried @ManyToMany(cascade = CascadeType.ALL) Map<String,Double> data = new HashMap<String,Double>(); But…… -
Introduction to Java graphics library
I have just entered information visualization and scientific visualization and have used Piccolo and some with JfreeCh…… -
Java – CPU usage and object wait
I use jpprofiler to analyze my application, so in the "CPU view" section, it shows that more than 40% of CPU time is s…… -
What is the best way to deal with low memory in Java?
We have an application that generates a new JVM and executes code on behalf of our users Sometimes, there is not enoug…… -
Javafx2 – poor performance when dynamically adding custom (fxml) panels to grid boards
problem My attempt I tried to expand from the pane public class Celli extends Pane{ public Celli() throws IOExcept…… -
Java – should the constructor of a private inner class be declared public or private?
Is there any practical difference public class OuterClass { private class InnerClass { public InnerClass()…… -
Java – interruptedexception cancel file open dialog box – 1.6 0_ twenty-six
The output of the following code is: java.vendor Sun Microsystems Inc. java.version 1.6.0_26 java.runtime.versi…… -
Java – width of jcombobox
I've created one jCombo@R_231_2419 @, but it requires the full width of the frame How to set a fixed width For the fra…… -
Java – why return null (Boolean value required) as the result of ternary operator compilation?
See English answers > Booleans, conditional operators and autoboxing I'm not allowed to write public boolean x() { …… -
Java – volatile semantics relative to other fields
Suppose I have the following code private volatile Service service; public void setService(Service service) { this.…… -
Java – a collection behaves like a queue, but allows me to get multiple elements at once?
I'm looking for a data structure that behaves like a queue (it may be a queue implementation), but allows me to get mu…… -
Java – what is the Maven coordinate of the Tomcat JDBC connection pool?
What is the Maven coordinate of Tomcat JDBC connection pool? Solution Through the improved search function on the Mave…… -
Java – where to use callable and runnable interfaces?
I am a novice in Java. I am reading the concept of multithreading. I have experienced these two concepts in various im…… -
Java – how to set the distance between vertically sorted elements?
I have this Code: JPanel myPanel = new JPanel(); myPanel.setLayout(new @R_778_2419@Layout(myPanel,@R_778_2419@Layo…… -
Java – @ cacheable breaks dependency injection
I stumbled upon a case in which the AOP proxy created with @ cacheable was created in spring 3.1 Dependency injection …… -
Java – why must an abstract method be implemented by the first concrete class rather than a further chain?
I'm curious why abstract methods must be overridden by the first concrete implementation class rather than hierarchy c……