Java 归档 - Page 307 of 655

Java – why does ThreadPoolExecutor have BlockingQueue as a parameter?

I have tried to create and execute ThreadPoolExecutor int poolSize = 2; int maxPoolSize = 3; ArrayBlockingQueue<Run……

Java

2020-02-19

Java – maximum size when parsing XML using DOM

I am currently implementing a rest client that will parse XML response messages Later, it will run on Android devices ……

Java

2020-02-19

Java – Best ant tutorial / QuickStart?

Avoid learning ants for too long (IDE and copy and paste make simple tasks easier) I now see myself forced to take sha……

Java

2020-02-19

The Java decompiler has the saved line number of the actual physical location

Many ide debuggers match physical line numbers http://java.decompiler.free.fr/ Not one Solution I have released a supp……

Java

2020-02-19

Pyspark: exception: the Java gateway process exited before sending the driver’s port number

I tried to run pyspark. Com on my MacBook When I try to start it, I get an error: Exception: Java gateway process exit……

Java

2020-02-19

Java – use opencsv to write CSV to string without creating actual or temporary files

I'm trying to write CSV files using the opencsv library The limitation is that I don't want to create files or even te……

Java

2020-02-19

Where can I find the source code of Java arrays?

Where can I find the source code of Java array? Example: double[] arr=new double[20];@H_301_5@ 所有具有任何维度的数……

Java

2020-02-19

Java – include the contents of the JSP in the servlet

I have this servlet: public class SaveImage extends HttpServlet { protected void doGet(HttpServletRequest request……

Java

2020-02-19

java. Lang. IllegalStateException: neither bindingresult nor the common target object of bean name ‘category’ can be used as the request property

I checked almost all the answers related to this question on the Internet, but I couldn't find the problem in my code ……

Java

2020-02-19

Java – MySQL InnoDB pending table level lock

I have a large production network application (GlassFish 3.1 MySQL 5.5) All tables are InnoDB The application hangs co……

Java

2020-02-19

What does Java – HashMap check when calling containskey()?

ArrayList<Integer> lis = new ArrayList<Integer>(); ArrayList<Integer> lis = new ArrayList<Integer……

Java

2020-02-19

Java – unit testing: assertions don’t work?

I've been applying for unit test for some time. Today I met some very strange things Consider the following codes: Tes……

Java

2020-02-19

The JavaFX CSS style of textarea does not work

I'm writing a simple JavaFX application, but I can't use some CSS styles This is the relevant CSS: .text-area { -fx-……

Java

2020-02-19

Java – XPath: is there any way to set the default namespace for queries?

Is there any way to set Java XPath as the default namespace prefix? For example, instead of: / HTML: HTML / HTML: head……

Java

2020-02-19

Retrieving array values from mongodb using java

I have the following code: DBCollection collsc = db.getCollection("StudentCourses") ; BasicDBObject querysc = new Basi……

Java

2020-02-19

Java – how to get the response body in zuul post filter?

How to read the response body when zuul is used as a proxy in the post filter? I try to call the code like this: @Comp……

Java

2020-02-19

Java – getgeneratedkeys() in Preparedstatement After executebatch()

I want to insert a few lines using Preparedstatement: ps = con.prepareStatement(query,PreparedStatement.RETURN_GENERAT……

Java

2020-02-19

Implementing type erasure of ArrayList in Java

I read this article on Java generics and mentioned that the constructor of ArrayList looks a bit like this: class Arra……

Java

2020-02-19

Java pdfbox – read and modify PDF (Metaphone) with special characters

I'm trying to modify the PDF using this method (the first code block – use the pdfstreamparser and iterate over the pd……

Java

2020-02-19

Java – why does NetBeans generate hashcode () in its way?

I've been using NetBeans for java development. There are some things I just rely on working without asking how These i……

Java

2020-02-19

Java – Jackson polymorphism: how to map multiple subtypes to the same class

I'm using Jackson 1.9 x. Suppose I have an animal class: public class Animal { private String type; // accesso……

Java

2020-02-19

Multithreading – cross thread communication in Delphi

Is there a document about cross thread communication in Delphi? How do I send messages to threads without windows? Sol……

Java

2020-02-19

Protected members access from different packages in Java – a curiosity

package packageOne; package packageOne; public class Base { protected void display(){ system.out.println("in Base"); }……

Java

2020-02-19

Java – scenario of extending thread class and implementing runnable interface

I am a novice in java thread programming, so it is a basic problem (I checked, but I haven't found this problem before……

Java

2020-02-19

Java – imagine a real concurrency scenario where StringBuffer should be used instead of StringBuilder?

I know the difference between StringBuffer and StringBuilder read here！ Usually, as Javadoc says, However, the Javado……

Java

2020-02-19

Java – can anyone provide a good explanation for dagger 2?

It's really hard for me to understand dagger 2 dependency injection system I understand that using the @ inject annota……

Java

2020-02-19

Java – why do you sometimes print system. Java first Err statement?

In Java, I noticed that sometimes, system The err statement starts with the system Print before the out statement, alt……

Java

2020-02-19

Java – cannot convert from actionprovider to shareactionprovider

I tried to implement a shareactionprovider in my actionbarsherlock The following code gives me this error: ReadingActi……

Java

2020-02-19

Java – interprocess communication between wars in the same container

What is the choice between two wars running in the same jetty container to achieve low latency communication? I basica……

Java

2020-02-19

Recursively search directories in Java

What is the best way to find a directory with a specific name in Java? The directory I am looking for can be located i……

Java

2020-02-19

Java – how do I start and continue running HSQLDB in server mode in my web application?

I don't want to use it in embedded mode because I may allow other external applications to access it And I want to sta……

Java

2020-02-19

Java – improve protocol buffer performance

I'm writing an application that needs to quickly deserialize millions of messages from a single file The main function……

Java

2020-02-19

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Java – why does ThreadPoolExecutor have BlockingQueue as a parameter?

Java – maximum size when parsing XML using DOM

Java – Best ant tutorial / QuickStart?

The Java decompiler has the saved line number of the actual physical location

Pyspark: exception: the Java gateway process exited before sending the driver’s port number

Java – use opencsv to write CSV to string without creating actual or temporary files

Where can I find the source code of Java arrays?

Java – include the contents of the JSP in the servlet

java. Lang. IllegalStateException: neither bindingresult nor the common target object of bean name ‘category’ can be used as the request property

Java – MySQL InnoDB pending table level lock

What does Java – HashMap check when calling containskey()?

Java – unit testing: assertions don’t work?

The JavaFX CSS style of textarea does not work

Java – XPath: is there any way to set the default namespace for queries?

Retrieving array values from mongodb using java

Java – how to get the response body in zuul post filter?

Java – getgeneratedkeys() in Preparedstatement After executebatch()

Implementing type erasure of ArrayList in Java

Java pdfbox – read and modify PDF (Metaphone) with special characters

Java – why does NetBeans generate hashcode () in its way?

Java – Jackson polymorphism: how to map multiple subtypes to the same class

Multithreading – cross thread communication in Delphi

Protected members access from different packages in Java – a curiosity

Java – scenario of extending thread class and implementing runnable interface

Java – imagine a real concurrency scenario where StringBuffer should be used instead of StringBuilder?

Java – can anyone provide a good explanation for dagger 2?

Java – why do you sometimes print system. Java first Err statement?

Java – cannot convert from actionprovider to shareactionprovider

Java – interprocess communication between wars in the same container

Recursively search directories in Java

Java – how do I start and continue running HSQLDB in server mode in my web application?

Java – improve protocol buffer performance

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