包含标签：Java 的文章
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Java – how to implement the same interface multiple times, but with different generics?
There is already an answer to this question: > how to make a Java class that implements one interface with two gene…… -
Java – why can’t object [] be converted to string []
>No error Object[] a = new String[]{"12","34","56"}; String[] b = (String[]) a; >No error Object a = new String[…… -
javax. Persistence field, comment of getter or setter?
I am learning hibernate and Java persistence API I have a @ entity class that needs to annotate each field I've listed…… -
Java – run “MVN package” on “build project” in eclipse
I have Maven java project during the solar eclipse I right click the project and select "build project". I want "MVN p…… -
How to configure Xdebug using Wamp
I'm using Wamp 2.0 and trying to install the Xdebug extension for PHP I have followed all the steps written here http:…… -
Multithreading – creating threaded local objects on Scala
I'm writing a computing library in scala Similar functions I grouped into local Scala singleton objects containing som…… -
Java – create immutable objects using JAXB
I am using JAXB to create Java objects from XSD files I'm creating immutable wrappers to hide JAXB generated objects (…… -
Java – how do you ensure that multiple threads can safely access class fields?
How do you maintain thread safety when accessing class fields through getter methods through multiple threads? Is the …… -
Java – when using HashMap, the values and keys are guaranteed to be in the same order during iteration?
When I iterate over values or keys, are they related? Map the second key graph to the second value? Solution No, not n…… -
Java EE – GlassFish V3 domain server cannot start The port is occupied
I imagine this is a very general mistake I can't seem to find any files I'm just trying to run a Java Web project with…… -
How to run Java programs on the server?
I've made a will The data in CSV file is stored in the Java application of MySQL database Now my client wants to uploa…… -
Unit test cases using JUnit (robolectric or mockito or both in Android)
This is the first time I have written unit test cases in Android So I searched a lot of things >Robolectric framewo…… -
Java – Eclipse’s $fall-through $annotation standard?
I use eclipse, so I use / / $fall - through $annotation, which is a common practice in switch statements and so on But…… -
Java – how can pattern search be faster?
I'm processing about 1GB of incremental files and I want to search for a specific pattern Solution Basically, what you…… -
Java – elasticsearch – using filterbuilders
I'm new to elasticsearch and couchbase I'm building a sample Java application to learn more about elasticsearch and co…… -
Sort the array by length, then alphabetically
How do I arrange arrays alphabetically? I have a list of numbers that I'm getting: Something1 Something10 Something2 S…… -
Java – no JPA transaction is currently active
It is implemented using JPA and eclipse link Code: try{ if(!em.getTransaction().isActive()) em.getTransact…… -
Java – let Android applications listen to shared links
When a user shares a URL from another application (such as a browser), I want my Android application to appear as an o…… -
Java – how to quickly create instances in CDI
Let's suppose I have a car class In my code, I want to create 10 cars The car class has some dependencies on the @ inj…… -
Java – server 415 response code
I'm using jetty web server and Jersey for rest processing I define: @POST @Path("/sendMessage") @Consumes ({MediaType.…… -
What kind of things can you use Java instead of Python?
I will choose a new programming language, Java, and have been using Python for some time But it seems that most things…… -
java – PropertyNotFoundException：Target Unreachable,’null’returns null
See the English answer > identifying and solving javax el. Propertynotfoundexception: target unreachable7 WARNING: …… -
How do I attach to a Java exception?
I am a novice and general exception to Java In my previous days of C / Perl programming, when I wrote a library functi…… -
Java – capture outofmemoryerror
Is there any memory error (Java. Lang. outofmemoryerror) in Java? Solution Yes Here are several examples to illustrate…… -
Java – retrieves the first number of a number
See the English answer > return first digit of an integer18 int number = 534; String numberString = Integer.toStrin…… -
Java – spring does not have an XML hibernate mapping class
In my ApplicationContext XML, this is how I map XML to POJO How do I map directories to class files without creating X…… -
Java – thread safe date parser
I am looking for a thread safe alternative to simpledateformat Parseobject is not implemented in the old fastdateforma…… -
Java: use decimalformat to format doubles and integers, but keep integers without decimal separator
I tried to format some numbers in a java program Numbers will be double and integer When dealing with double precision…… -
Java – I need to know how Haskell represents data and can write a good Haskell program?
I'm learning Haskell from a Java background When I program java, I think I know very well how objects are arranged in …… -
Java – real ORM: how to handle maps?
I'm creating an Android application. I need to persist map < string, MyClass > Solution As you've noticed, real …… -
java – Resources. Openrawresource () releases Android
I have a database file in RES / raw / folder I'm calling resources Openrawresource(), the file name is r.raw Filename,…… -
SIGTERM is not received by the java process using ‘docker stop’ and the official JAVA image
I use Debian / Jessie based image Java: 7u79 to run the dropwizard Java application in the docker container My java ap……