Java
-
Java – enables existing spring batch applications to run on multiple nodes
We have an existing spring batch application, and we hope it can run on multiple nodes The scalability documentation f…… -
Why does Java use heap data structures to store objects?
Or it does not use heap "data structures" The name allocated to memory (internal pool) was just called "heap"? If so, …… -
Java – alternative to randomaccessfileorarray (byte [])
Who can tell me the alternative method of random access file or array (byte []) of iText Solution From located http://…… -
Java – an effective way to use neo4j to find a node set related to a given node
Given two nodes, is there an effective way to find a set of common nodes (with defined relationships) For example, con…… -
Java – why is it necessary to override hashcode and equals methods of HashMap?
See English answers > what issues should be considered when overriding equals and hashcode in Java? 11 Now I've rea…… -
Java dateformat: how to handle “ST”, “nd”, “Rd”, “th”?
How to use some dateformats to parse such strings? As far as I know, there is nothing in simpledateformat Solution Try…… -
In Java, is there a type constant equivalent to Pascal
In Delphi / Pascal, there is a mechanism through which local variables in a method can remember the value from one met…… -
Java – core and core_ Differences between RT and JSTL Tags
When I use <% @ taglib URI = "http: / / Java. Sun. COM / JSP / JSTL / core" prefix = "C"% > for my struts 1.3 10…… -
Using the dropwizard to process long requests
I have a simple dropwizard service. I want a rest API to start a long-running processing task - including CPU and I / …… -
Java – get interceptor parameters in struts 2
I have the following action mapping <action name="theAction" ...> ... <param name="param1">one</par…… -
Java – try creating with strings
I found an interesting case when I used a string to create and check its hash code In the first case, I use the copy c…… -
Using recursive methods in Java
For homework, I was asked to write an inclusion method for the custom linked list public class OrderedList { private …… -
Java – a technique for extending classes using private constructors
Is there a standard technique to "extend" classes with private constructors, like most singleton classes? Specifically…… -
Java – error: importing com google. appengine. api. Datastore failed to parse JPA gae GWT
Error in development mode [ERROR] [cbd] - Line 15: The import com.google.appengine.api.datastore cannot be resolved Us…… -
Java – the best way to pass objects between classes in different threads?
I have a "runnable" class "a" and I use Java unmarshallers to create new objects The maingui thread attempts to access…… -
Java – read data files into object arrays?
I encountered a problem reading files into an array of objects I created an IF statement to divide the data rows into …… -
Java – streaming video using xuggler
I can successfully play the video with xuggler using the following code I need to be able to stream from InputStream i…… -
Unexpected token using lower bound wildcard (Java)
I have something similar: interface Foo<T> { //... lines [0,45]... /*line 46*/ <R,X super T&R> Li…… -
Java try / catch problem
I'm new to Java. I always encounter problems with the try / catch function in the code, so I wonder if you can help me…… -
Java – use try catch finally to return the type
See English answers > java's return value in try catch finally mechanism4 private Integer getnumber() { Integer…… -
Java – what is the best practice for socket programming – do I turn it off or leave it open every time?
I haven't found a definite answer yet I have a client / server application in Java 7 The server and client are on sepa…… -
Click the selenium Java button
I have a button: <input type="button" onclick="onOpenSessionClick()" value="Open device access"> But when I exec…… -
Java – filechannel ByteBuffer and hashing files
I built a file hash method in Java, which accepts the input string representation of file path and file name, and then…… -
How to determine if another process is using the file (Java)
I tried many examples, but no one worked I also try to use trylock() It always returns false Why? private boolean chec…… -
Java – @ stateless WebService with JPA JTA: how to submit changes to managed entities?
I have the following simple WebService declared as @ freeless EJB in GlassFish 3.1 Run on 2.2, eclipse link 2.4 1. Use…… -
Java – append video files with different widths and heights
I'm building an application where users can record screenshots An integral part of the application is that you can tem…… -
How to connect to gromy’s JMX faster
I use the Weblogic example: http://groovy.codehaus.org/Groovy +And + JMX connects JMX to groovy The problem is that th…… -
Java – joda time days since the era
I have a question, @ L_ 419_ The number of days since epoch returned by 0 @ library changes according to the date I en…… -
Cross platform with asynchronous support Net websocket server Library
Are there any cross platform (read: single friendly) libraries that provide websocket server support and allow asynchr…… -
Java – using enumerations in Scala
I have Scala style enumerations object SomeObject { final object SomeEnum extends Enumeration { type SomeEnum =…… -
Accessing C constants (titles) from JNI (Java Native Interface)
How do I access constants defined in C header files from the Java side (through JNI)? I have a header file C_ header. …… -
Java – from system In get Unicode value
I created one from system In to get the input scanner so that I can get the input from the console Scanner scanner = n……