包含标签：Java 的文章
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Java – realm: change the name of the migrated field
I want to change the field name during the real DB migration Is it correct? It takes a lot of time The following code …… -
Java – is there a more portable way to encapsulate pointers than jlong in JNI?
I've seen an example of using long / jlong to allow Java objects to hold C pointers: class Foo { private native lo…… -
Java – Mac hosts do not like docker container port forwarding
This is my first attempt to use docker. I'm trying to make a @ L_ 404_ 0 @ boot web application runs in docker contain…… -
Java – how to find the parent JSON node when parsing JSON
I'm using Jackson to parse JSON streams The API I'm using is objectmapper readTree(..) Consider the following flows: {…… -
What is the appropriate media type for Java – Hal JSON?
I'm using spring to create restful services, and I'm curious about the syntax of media types According to my understan…… -
Java – Liferay API / jsonws page can only be accessed by administrator users
Anyone can tell me how to restrict ordinary users from accessing Liferay API / jsonws pages The API / jsonws page can …… -
Write 3D games in Java
Hi, I started learning java this summer because I like creating games very much I managed to master the Java se core. …… -
Java – log4j: error with Tomcat 6
I wrote a web application in Java EE I use log4j and Tomcat 6.0 28. When I start my application in tomcat, an error me…… -
Java – log4j2: the location where the log4jcontextselector system property is set for asynchronous logging
I tried to set asynchronous logging in the rest web method currently running in the free profile server (for performan…… -
Select a Java Web Framework 2011
My question is based on the following question: choosing a java web framework now? The reason for my problem is that a…… -
How to make indexof case insensitive in Java
I have a simple question How to use @ L_ 419_ Make indexof case insensitive in 0 @ This question has been answered in …… -
Java: the reference to static context is similar to class self reference ‘this’, which is often used as the coding style
As mentioned in Python, I have been using class self - reference since the recent beginning of Java, whether it is man…… -
How do I find infinite loops in Java Web applications?
One day, the CPU utilization of our Java Web application reached 100% We try to find the problem by using kill - quit …… -
What methods can represent weighted directed graphs in Java?
I can't use any external libraries, so I try to think of some ways to build my own data structure I was thinking maybe…… -
Unknown developer of Java Web start application on OS X
The Java Web start application signed on Mac OS X 10.9 blocks this message by default: "application.jnlp" can't be ope…… -
Java XOR two arrays [closed]
I have to apply one XOR two arrays as if I had the following: array_1: 1 0 1 0 1 1 array_2: 1 0 0 1 0 1 I want a funct…… -
Java webdriver: element invisible exception
I have the following questions I have a hidden drop-down list, so when I make a selection and run the test, I get the …… -
How do I type π (PI) in Java?
Is there a character in the math API that allows the character π to be represented? Solution You don't even need to us…… -
Java – with restlets, xStream annotations don’t seem to have any effect
Using @ xstreamomitfield in my POJO doesn't seem to have any impact Annotated fields are still exposed in XML or JSON …… -
Java – why is “. Concat (string)” much faster than “”?
See the English answer > string concatenation: concat() vs "+" operator11 for(int i = 0; i < 100000000L; i++) { …… -
Java – what dependencies are required for the embedded ActiveMQ proxy?
I am trying to use the embedded ActiveMQ agent for unit testing as follows: http://activemq.apache.org/how-to-unit-tes…… -
Java – values cannot be placed in MDC
I tried to record several values in onbeginrequest () of requestcycle () in the ticket Here are the codes: getRequestC…… -
Java – why does the scheduleatfixedrate – schedulewithfixeddelay method not use callable
I'm doing some experiments on Java 8 concurrency In the scheduledthreadpoolexecutor API I can see the following two si…… -
Java – set vs list vs array as return type of EJB method
I was recently told that collection should take precedence over list as the return value of EJB methods The argument i…… -
Java – JUnit Derby spring: the in memory database is discarded after each test
In my unit test, I automatically installed some data sources using URLs jdbc:derby:memory:mydb;create=true Create dB i…… -
Java – explains the behavior of automatically incrementing a composite ID sequence using hibernate mapping
I have a table CREATE TABLE `SomeEntity` ( `id` int(11) NOT NULL AUTO_INCREMENT,`subid` int(11) NOT NULL DEFAULT …… -
Is there OLE automation in Java?
Can OLE automation be used in Java? If not, why is it impossible in Java? I want to automatically export Excel spreads…… -
Array – call the constructor with array parameters from PowerShell
I am a beginner and know c# moderation Recently, I was writing this power shell script and wanted to create a HashSet …… -
What kind of Java syntax is “= = null? False: true;”
I'm looking at the code and wondering what this means: Boolean foo = request.getParameter("foo") == null? false:true; …… -
Java: how to check whether a lock can be acquired?
If I want to ensure exclusive access to objects in Java, I can write this: ... Zoo zoo = findZoo(); synchronized(zoo) …… -
Java – stores the contents of a text file line by line into an array
All, the problem I'm facing now is that I don't know how to store the contents of the text file in the array Is it pos…… -
Java generics and number classes
I want to create a method to compare a number, but can have an input of any subclass of a number I see this in the fol……