Java
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Java – exceptions in Google guava eventbus and event handlers
The guava eventbus documentation illustrates this If you know that some exceptions may occur, you can register the sub…… -
Java – how to delete firebase data after “n” days
I want to delete some old data in my friedbase I know this question has been asked a lot here, but it is still difficu…… -
Java – how to resolve jar conflicts at run time?
I have two jars in conflict They all contain a class with the same package name and class name For the same reason, I …… -
Java – dynamodbmapppingexception: mapping without hash key
When writing dynamodb Java application, if the table and its data model are not configured correctly, you can receive …… -
Java – stream mapping to find the value of the latest key
I have a map < < element, attributes >, which consists of the following (example) classes and instances of en…… -
Java – “unable to parse the symbol ‘request’ of Facebook graph API” error
I will the latest Facebook SDK 4.0 1 is included in the Android studio project I want to make the basic graph API call…… -
When they are Is java integer always = = when equals()?
See English answer > java: integer equals vs. = = 5 Integer x = 5; Integer y = x + 1; Integer z = y - 1; x.equals(z…… -
Get errors in C using vector and struct
What is the error in this Code: #include <iostream> #include <vector> #include <algorithm> using nam…… -
Nsurlconnection – variable nshtturlresponse or nsurlresponse
I need to modify the response header in the nsurlresponse Is that possible? Solution I just talked about it with my fr…… -
Java – which framework should I choose for a particular web application?
What are the factors that determine the choice of framework, the technology of web application Any architect should pr…… -
Java – why cast to closed first?
While reading some java source code, I came across this line: ((Closeable) some_obj).close(); some_ Obj is obviously a…… -
Java – how to hide public methods?
There is a method in my static state machine that is used only once when my application starts for the first time This…… -
Can I rename implemented methods in Java?
I have a class that implements the interface, and one of its methods is called onclick Is there a way to implement onc…… -
Errors that require assistance in compiling basic Java programs
I'm new to Java I'm having trouble compiling basic Java programs, and I'm trying to understand why (note that the TEXT…… -
Is there a C equivalent to Java concurrenthashmap#
I need a dictionary / HashMap in c# that allows you to do the following >The placement value does not iterate simul…… -
Java – how do you handle the generated code?
What is a good strategy for handling generated code? One of our projects uses Apache CXF's wsdl2 Java tool to generate…… -
Use the “Java” command to run CentOS Jar file
I'm trying to run on my CentOS box Jar file, but it says "Java: command not found" What is the best or simplest way to…… -
Declare parameter subtypes in Java interfaces and use subtypes in Java implementation methods
I want to declare a method in the interface, where the parameters of the method defined in the implementation class ca…… -
Java – opencv “Hello world” example for Android
How do I use opencv on Android? If possible, please provide a simple "Hello world" opencv code example for Android Sol…… -
Java – Android layout files do not allow characters such as &, <, >
When I try to use &, <, > as main XML and strings XML, which returns an error I want to mean "&" and "&l…… -
Java – dependency injection: should dependency objects be passed as constructor args?
Video here It explains what it should be How to explain dependency injection to a 5-year-old? So I'm confused now Solu…… -
To build a Java based stock trading application, you need to point to the technology to be used
I am using Java (with jQuery front end) to build an application that needs to communicate with third-party application…… -
Java – JFrame with multiple layers
I have a window with two layers: a static background and a foreground containing moving objects My idea is to draw the…… -
Java – do you want to keep interconnected strings when serializing?
If I have a large object graph with many duplicate strings, is it good to actually () the strings before serializing t…… -
Java – how to customize exception handling behavior in JUnit 3?
I want to use JUnit 3 to implement exception checking (as in JUnit 4) For example, I would like to be able to write th…… -
Java libraries with more data structures
Anyone can point to some excellent Java libraries (jars), which have more data structures than part of the standard Ja…… -
Java – apt and AOP use Maven in the same project
I have to use annotation processing (APT) and AspectJ in the same Maven project Both are suitable for me, but I need t…… -
Java – a simple way to remove headers from XML files
I need to remove non - XML tags from a file generated by another program The document reads as follows: Executing Comm…… -
Java – warning: [rawtypes] found original type: defaultlistmodel
I got this warning from the compiler, which makes no sense (at least to me) It basically requires me to assign type to…… -
How to convert list to HashMap
How can I convert this: Map<String,Integer> itemsBought So I can add it to the ArrayList as follows: public void…… -
java – println(String s)vs println(Object o)
In my opinion, printstream Print (object x) and printstream Println (object x) and printstream Print (string x) and pr…… -
Java policy error applet alert
[aspectj:compile {execution: default}] [aspectj:compile {execution: default}] Current policy properties: mmc.s……