Java
-
Java classloader dilemma and locked jar
I was playing with classloaders in Java and noticed a strange thing If the classloader loads a class from a jar, even …… -
Java – NullPointerException at the end of the file
What I want is to access the EOF by reading the command line from the console and typing Ctrl z from the BufferedReade…… -
Java implicit conversion
Use the following code: Float a = 1.2; There is an error because it takes decimal as the value of double, which is a l…… -
Java – andengine – cannot instantiate activity
I'm a novice in Android development. I have a problem using andengine I tried to run an empty application, but got a r…… -
Binary search in the sequential table in Java
I'm looking for a way to implement code in Java, which works the same as binary search in ordered ArrayList, but for o…… -
java – ClassNotFoundException Android
So I encountered a problem when dealing with Android programs I have a class that converts XML strings into Java objec…… -
Java – restlet client repeatedly calls restlet server suspend
I am using restlet to implement web services The client (also using restlet) makes several consecutive calls to the se…… -
An unexpected error occurred while using Lambdas in Java 8
I use Java 8 update 20 32-bit, Maven 3.2 3. Eclipse Luna build ID: 20140612-0600 32 bits After I started using Lambdas…… -
The performance of regular expressions in Java is compared with that of indexof
Please tell me how to match "" And period "." It is also more effective to use indexof () instead of regular expressio…… -
What does the Java – cvhaardetectobjects () method do?
Some experts can explain whether I can use the cvhaardetectobjects () method to detect the box and obtain the width an…… -
Java: text strings
class A { class A { String s4 = "abc"; static public void main(String[]args ) { String s1 = "abc"; …… -
Why is tomee Java ee6 certified but not tomee?
As the title says I know very little about the internal working principle of Java ee6 certification However, it seems …… -
How to send int through UDP in Java
I'm trying to write some code to send a single int through UDP My code so far: From: int num = 2; DatagramSocket sock…… -
Java – set the location of Jfilechooser
How do we set the location of the Jfilechooser window? I tried the setlocation () and setbounds () methods, but it did…… -
What is the best way to learn security in Java A-Z
I am a J2SE / Jee developer, a novice in Java security, and plan to learn more about this topic You can help me guide …… -
Variable declaration in Java – if clause
if(someCondition) if(someCondition) int a=10;//Compilation Error else if(SomeOtherCondition){ int b=10;//no compilat…… -
Extract flow graph from Java stream >
I have a stream (this format is not set by me and cannot be changed) for example Stream<String> doc1 = Stream.of…… -
JavaFX – how does cellvaluefactory() and cellfactory() work? What’s the difference between them?
I want to know about these methods cellvaluefactory(); And cellfactory(); When will it be called? What is their purpos…… -
Java – what does the @ modelattribute annotation at the method parameter level mean?
The spring 3 reference tells us: I don't understand this magic spell because I'm sure that the alias of the model obje…… -
Java – wait for the third-party thread to complete
I have a thread running a third-party library, which will also run its own thread When the run method of my thread com…… -
Java – download files using asynctask
I tried to download a file with asynctask, but it didn't work, no error message or nothing, just didn't download the f…… -
Java – weak reference instead of getactivity () (Android avoids memory leakage)?
In order to avoid memory leakage, I wrote the following method, which will be used for activities, mainly for fragment…… -
Java – SQL prepared statement for creating tables
I want to know some methods of dynamically creating tables based on user input (SQL prepared statement) CREATE TABLE ?…… -
java – JAXBElement vs boolean
What exactly is a jaxbelement Boolean value and how to set it to Boolean equivalent to "true"? method: public void set…… -
Java – use pdfbox 1.8 8 visual signature
I'm trying to use visual signatures and pdf@R_486_2419 @Make PDF I have two streams, it seems pdf@R_486_2419 @Only fil…… -
Java – the spring boot rest controller returns 404 when deployed on an external Tomcat 9 server
I have a spring boot rest web application that runs perfectly on an embedded server However, in accordance with the bl…… -
“Cannot reproduce” – is java deterministic multithreading possible?
Can this run multithreaded Java applications in a deterministic manner? I mean, always use the same thread switch in t…… -
What types of encryption are available in Java?
I am implementing the data transfer model in Java I have implemented DES, 3DES and AES in my application. I would like…… -
Returns c# the dictionary in a multithreaded environment
I have announced a dictionary of dictionaries: Dictionary<String,Dictionary<String,String>> values; I have…… -
How to write large byte ByteBuffer to small byte in Java
I currently have a Java ByteBuffer, which already has data in big endian format Then I want to write a binary file as …… -
How to use java to calculate the number of options in the selection drop-down box in selenium webdriver?
I have a selection drop-down list: xpath //*[@id="ddlTablePay"] I need to calculate the number of options in this drop…… -
JavaFX CSS error (attribute style sheet does not exist)
I've just started building JavaFX applications in IntelliJ using the latest Java 7 SDK I have built my interface using……