包含标签：Java 的文章
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Java: catching specific exceptions
Say I have the following try{ //something }catch(Exception generic){ //catch all }catch(SpecificException se){ //catch…… -
Java – HashMap means that even if it does exist, the key does not exist
I have an interesting problem. I'm sure it's HashMap's fault Consider the following debugging code (AMAP is the HashMa…… -
JUnit – performs custom actions when the given mocked void method is called
When a given void method is called, I want mockito to perform a custom operation Say I have the following code: @Autow…… -
Java – how to override object array attribute types in RAML 1.0
I have a common Java type, as follows: class Response<D> { List<D> data; } And want to create something …… -
Java – create XML documents using NodeList
I need to create an XML document object using NodeList Someone can do it for me I've shown you the following code and …… -
Java – how to use El JSTL to convert arbitrary objects to strings? (call tostring())
Is there a way to call toString () in an object with EL and JSTL? (I need an enumerated string representation as an in…… -
Java – connection pool for dynamic database connections
The problem setting is based on a web service (spring / Java, tomcat7 and MySQL). Each user obtains its own database, …… -
Java – hibernate SQL query result mapping / conversion to object / class / bean
1 2: Select (table. * *) / (all columns) ok String sql = "select t_student.* from t_student"; //String sql = "select t…… -
Java – which runs faster, ArrayList or LinkedList?
There is already an answer to this question: > when to use LinkedList over ArrayList? 30 List li = new LinkedList()…… -
JPA temporary information was lost during creation
I have an entity with a transient field When I want to create a new object instance, I lose my transient information T…… -
Java – calling a method is faster when you initialize an object or save it as a variable and call the method
Suppose there is a classA class that gives the value I need through non - static methods If I only need the value of o…… -
Multithreading – testeract 3.00 multithreading?
I read some other posts and suggested that they add multithreading support in 3.00 But I don't know if I add it after …… -
What experience have you had with functional Java projects?
I am reading the following questions – how safe would it be to use functional java to add closures to a Java productio…… -
What does this () mean in Java
There is already an answer to this question: > what the use of this() in LinkedList java2 It appears to work only w…… -
Java – Android Maven does not start the simulator
When I right-click My Android project and select run – > Android application The simulator is started and the chang…… -
Java – operator = = wrap differential behavior on class objects
Any body can explain what happened in my output static void main(String args[]) { Integer aa = Integer.valueOf("12…… -
Can anyone simply describe the difference between the three closure proposals and their current state in Java?
I'm reading closures that will appear in Java 7 I'm a little confused because on the one hand, there are many good art…… -
How to use org. Org in Java apache. commons. Lang namespace?
I tried using org. Org in eclipse apache. commons. Lang. notimplementedexception, although you can see from IntelliSen…… -
How to understand “consistency before occurrence is not enough” in Java
In Chapter 17 of Java language specification, there was a part explaining why "lack of consistency" Here is an example…… -
How to use the java7 file attribute APIs to get the digital groupid / userid?
I can use the following code to get the name of the file owner; final PosixFileAttributes basicFileAttributes = …… -
Why do we need abstract classes in Java?
Why do we need abstract classes in Java? If you will never be an object, why do you do it? How do you use it? Why is t…… -
Java – how to design a system to send records and retry sending if no confirmation is received?
I'm working on a project where I need to consume a lot of records, and then I send these records to other systems usin…… -
Java – Android studio – gradle 1.5 – core library options
There is a problem with my android project and gradle 1.5 I know that searching from Android devices may not be the be…… -
Java – why does UDP datagram fail even when the process is running locally?
Then I am developing a java interface between the streaming media server and the flash client I noticed that even if b…… -
Java – large inner classes and private variables
One thing I've experienced several times is that a service class (such as JBoss service) has become too large due to t…… -
Java – how to bind this service in Android?
This is the code in my activity Start the intention and connect, right? hello_service = new Intent(this,HelloService.c…… -
The best Java Jabber Client Library
What are your good / bad experiences with the Java Jabber library? Solution I have good experience in smack library I …… -
Java – loop through the list, a better way
When I write and discover new ways of working in Java, I'm always confused about the better way to loop lists to outpu…… -
java – org. hibernate. Objectnotfoundexception: no row with the given identifier exists
Since hibernate 4.1 Since August 8, I have had a problem, resulting in the following exceptions: org.hibernate.ObjectN…… -
Java – multi module project configuration based on spring MVC annotations
I implemented two Maven based independent web projects using spring MVC, hibernate and Jax rs Item 1: parent program &…… -
Java – the location of the currently running class or jar file
I have a Lotus Notes database that is performing some interaction with remote web services I wrote a custom Java class…… -
Java – your project location contains spaces (Android Studio)
I just moved from eclipse to Android studio for Android application development When creating a project, I received th……