Java
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Rx-java2 – create custom operators in rxjava2?
It's hard for me to find examples of how to create custom operators using RX Java 2 I have considered several methods:…… -
How can I share Java functionality without providing other source code?
When programming in C language, we have header files and source files When our company sells our products (essentially…… -
Java – why is cloning arrays so slow?
This test for (;;) { int[] a = new int[10]; System.gc(); long t0 = System.currentT…… -
Java – 1e9d divided by what does that mean?
This is a clip: String myTime = someTime / 1e9d + ","; Sometime is using system Derived from nanotime() 1e9d what are …… -
Java – why does this type parameter remain in bytecode?
Type erasure page says However, for the following classes: public class Foo<E extends CharSequence> { public…… -
Java – Sudoku solving method
There is something wrong with my Sudoku solving method The plan works as follows; When the circuit board starts, it is…… -
Comments – how do I discard bindings in Ocaml?
I want to comment the function in the external library as deprecated to ensure that it will not be used in my project …… -
java-8 – Weblogic 12.2. 1 Java 8 Spring Data JPA Hibernate 5. X deployment conflict
I'm trying to use 5.0 with hibernate X and spring data JPA 1.9 Weblogic 12.2.4 1. Deploy ear file In Weblogic 12.1 The…… -
How to unit test Java methods using processbuilder and process?
I have a Java method that starts a process with processbuilder, outputs its output pipeline to a byte array, and then …… -
Java: non heap memory analysis
The problem we have is that our non heap memory has been growing So we have to restart our Jee (java8) – webapp every …… -
Multithreading – operations in a separate TThread block GUI thread
I use this tutorial http://delphi.about.com/od/kbthread/a/thread-gui.htm Creates a class that uses the tdownloadurl to…… -
Java – determines whether the list number is continuous
I work in Java I have an unordered list of 5 numbers, ranging from 0 to 100, without repetition I want to check whethe…… -
Java – firestore – objects with internal objects
Custom object with (documentsnapshot documentsnapshot) parameter It is also the internal object of firebsae. It retrie…… -
Java – spring security authorizes the requests value from the database
I want to configure the authorize requests value from the database when the server starts At present, I have given the…… -
Link to any online tutorial on JSR 330: dependency injection in Java?
I'm looking for some tutorials on JSR 330: dependency injection in Java Google search doesn't provide much information…… -
Java – is ThreadLocal better than HttpServletRequest setAttribute(“key”,“value”)？
The servlet specification (see my previous question) guarantees that the same thread will execute all filters and asso…… -
Java – how do I ensure that a given dependency is included in my application using the spring framework?
This will be an indescribable problem, but there are We are using Delphi spring framework ( http://code.google.com/p/d…… -
How wildcards work in Java
I'm reading a java tutorial on wildcards in generics In the following code: void printCollection(Collection<Object&…… -
Java – running Google App Engine applications on multiple client domains
I want our customers to integrate our Google App Engine Application into their domain For example, suppose a customer …… -
Java – hibernate conditions use group by and return entity list
I'm trying to use group by in my standard I need to do this: SELECT b FROM Book b GROUP BY volumeCode; I have the foll…… -
Java – Sam type optimization
The working document describing the status of project lambda refers to the so-called Sam (single abstract method) type…… -
Java – hibernate restricted result query
How does the maxresult property of a hibernate query work? In the following example: Query query = session.createQuery…… -
Java – any algorithm for the “flip all” (light out) game?
In this game: http://www.mathsisfun.com/games/allout.html OK, after reading some answers and comments (and taking a qu…… -
java – MethodHandles. lookup(). defineClass retention
MethodHandles. Lookup. Defineclass generates a new class from the byte array at run time Under what circumstances can …… -
Java – why can I assign a value to a char variable without explicit conversion?
I wonder why this clip works char ch1; ch1 = 'a' + 1; System.out.println(ch1); In line 2, instead of promoting the rig…… -
Java – short for bitwise operations
I use a technology called DDS. In IDL, it does not support int. therefore, I think I will use a short one I don't need…… -
Java – why can’t my JNI code successfully find the GetMessage method of jthrowable?
I'm trying to access the message in jthrowable and handle the exception generated when the class cannot be found Howev…… -
Java – how to sort the values of the HashMap freemaker template
I have this HashMap in Java: HashMap<String,String> map = new HashMap<String,String>(); map.put("k1"…… -
The JPA / Hibernate timestamp is not saved in the database / object entity
I'm using javax Persistence as my entity object MySQL for database @Column(name = "ENTRYDATE") private Date entryDa…… -
Java – how to resolve exceptions in bufferinputstream mule, the type of message payload
I've converted to a byte array, but I keep getting this error: ERROR 2015-02-25 11:12:30,517 [[ESR].HTTP_Request_Liste…… -
How do I detect completed resizing operations in JavaFX?
I have a stage, a scene and a WebView node When I expand the window to a larger size - things get very slow due to Web…… -
Java – find Net 3.5 / J2EE architecture concept comparison article / chart
We're thinking about bringing the Net technology combined with Java Technology (WCF, JBoss / ESB, mom, WPF, WF), I nee……