包含标签：Java 的文章
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How do I run the server without using a while loop?
I'm trying to create a server program using datagram socket and datagram packet classes, but my current code uses an u…… -
AVL tree rotation in Java
I want to implement Java AVL tree and rotate the tree left and right I didn't get this Anyone can tell me how to rotat…… -
Convert hexadecimal strings to unsigned byte arrays in Java
I get a 14 byte hexadecimal string, such as a55a0b0500000000000022366420ec But I want to compare them with such bytes:…… -
Java – why is enumeration more useful than HashMap in this case?
This seems to be a common problem, but all the items in the suggestion box don't accurately explain what I'm thinking …… -
Java – @ entity entity cannot be resolved to a type
Learn spring MVC and hibernate import javax.persistence.Column; import javax.persistence.GeneratedValue; import javax.…… -
Java – common code when rewriting abstract methods – Design Problems
I have an abstract class like this public abstract Stuff { public abstract void doStuff(); } Several classes are e…… -
Garbage characters when reading text files in Java
I have a Java call windows bat file that performs some processing and generates an output file if ( filexists("output.…… -
Is there a Java equivalent of the Java sched module?
Raymond Hettinger released a snippet that uses the sched module provided in the standard Python library to call functi…… -
Initializes a Java object instance that contains an array of objects
The following code is correct: public Sample mOboeSamples[] = { new Sample(1,1),new Sample(1,2) }; public Sample mGuit…… -
Java – declare int [] array without defining size?
This is my code: int[] primes = new int[25]; for (int i = 2; i <= 100; i++) { for (int j = i; j &g…… -
Is java – x Lang safe?
I often hear this question in discussions with Java developers They (Java developers) always ask if your choice is sec…… -
Java – helps create generic classes to avoid code duplication
I have a simple question. Try to use appengine to keep dry The following two functions are the same except for the obj…… -
Java – when using Grails sortedset, the first () element cannot be accessed from an empty list
I'm trying to dynamically create some Grails domain objects and then add a sortedset declared in another Grails domain…… -
Java – what are JPanel, JFrame, jlayeredpane and jrootpane
I am a novice in Java. When reading, I encountered various frameworks and panels. What is the confusion between JFrame…… -
Java – NullPointerException when trying to read parcel ArrayList
I have a class message that implements Parcelable It contains an ArrayList, and attachmentsdata is also one of my clas…… -
Java – why link string Will trim () throw an exception?
Sorry, if this is a stupid question, but I can't find an explanation I have a string like this: String str ="This is 5…… -
JavaFX – how to add a container in the anchor pane
I have a simple project that contains fxml. XML with a splitter So fxml is like this: <AnchorPane id="AnchorPane" p…… -
Java – how many elements does ArrayList add when it resizes itself?
Java's ArrayList dynamically extends itself when needed How many elements will it add when the extension occurs? Does …… -
Java – breaks a string into two at a hyphen
I get the string variable from the request String issueField = request.getParameter("issueno"); This may or may not ha…… -
java – Codingbat- Recursion1- count7
Anyone can program the next question for me (from codingbat – recursion1 – count7) Given a nonnegative int n, the numb…… -
Java – under what circumstances thread Is sleep () the best way to pause a thread?
Thread. Sleep () seems like a very useless concept to me, because the only way I see it work is in the following scena…… -
Override the list result type in Java
I want to compile some variations of this code in Java class X { List<X> getvalue(){...}; } class Y extends…… -
Java – get the class name with generic information
In the Java serialization problem, I want to save some class names. I have some problems with generic classes Any idea…… -
Get metadata information of file owner using java
I am trying to retrieve the owner of the file using the following code: Path file = Paths.get( fileToExtract.getAbsolu…… -
Java – override generic methods using non generic implementations
I was trying generics in Java and thought of this example If I have classA < T >, I can override it with Subclas…… -
Java – VTD – XML parsing performance (key factor of speed) Request feedback / comments
I'm about to use VTD XML (in http://vtd-xml.sourceforge.net/ Found), but I'm interested in getting feedback on any act…… -
Java – how to create CSV files using servlets?
I want to download the CSV file from the servlet Data from object [] obj = search getSearch(); I have a data object []…… -
Java – when we change to bytes, why is the result – 2 when 127 * 2?
This is my code: public class test { public static void main(String[] args) { byte a=(byte)127,b=2; byt…… -
Java – rest Service on wildfly pathparam is empty
I am building a rest service using Jee 7 and deploying it on wildfly 8 With the exception of pathparam, everything see…… -
Algorithm – search for the 7th largest element in the largest heap?
So my friend and I don't agree on this issue It requires the time complexity of searching the 7th largest element in t…… -
Java monthly timer
I'm trying to create a timer / TimerTask that will run on the same day of each month I can't schedule a repeat timer b…… -
Java Concurrent HashMap
I want to convert concurrenthashmap to treemap Can I do that? Solution If you need a sorted concurrentmap, please chec……