包含标签：Java 的文章
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java – sun. security. x509. Certandkeygen and sun security. pkcs. Pkcs10 – missing in jdk8 Implementation recommendations
In jdk8, the class sun security. x509. Certandkeygen no longer exists Sun. Com is still missing security. pkcs. PKCS10…… -
Java generics and factories
Establish: I have some formatter interfaces: interface Formatter<T extends AbstractItem> { String format(T ite…… -
Java – should I synchronize static volatile variables?
There are several questions about this problem, but most of them focus on this problem, because this is not the intent…… -
Java – viewrootimpl. In viewtransitioncoordinition Setpausedfortransition (Boolean) when NullPointerException is converted to another activity called prematurely
In my Android application, I have a startup screen where I make some settings and loads My application uses the defaul…… -
How do I determine the size of permgen in a Java application (that is, programmatically)?
>Is there any way to measure the permgen size currently used in my java application? I cannot use external analysis…… -
PowerMock Mockito [PowerMockito] @PrepareForTest – > java. lang.NoClassDefFoundError：javassist / NotFoundException
I'm trying to use my first powermockito [powermockito] simulation in existing JUnit tests I've narrowed down that when…… -
Java – use generics to implement common methods in abstract classes
Suppose I have this hierarchy: public abstract class AbstractEntity implements Cloneable { ... public Abstract…… -
How to create a directory in the current working directory in Java
What is the simplest way to create a directory called "foo" in the current working directory of my java application (i…… -
Java – API retry logic in Amazon Web Services
http://docs.aws.amazon.com/general/latest/gr/api-retries.html This document mentions that "each AWS SDK implements aut…… -
MOXy JAXB javax. xml. bind. PropertyException
I follow this example: http://wiki.eclipse.org/EclipseLink/Examples/MOXy/JSON_Twitter Now I have this class: import ja…… -
Java: namedquery string problem
Hello, I encountered some exact matching problems when doing namedquery I am currently using something like this: @Nam…… -
Java – time complexity of iterating over array lists
I have an array list and I iterate In each iteration, I call get () to get an element, and if the item passes some con…… -
dispatch_ semaphore_ Grand central dispatch of create – lvalue parameter?
In dispatch_ semaphore_ In create, what does the long value parameter mean? dispatch_semaphore_create(long value) I do…… -
Java – how do I read from a specific header in opencsv?
I have a CSV file I want to extract specific columns from it For example: id1,caste1,salary,name1 63,Graham,101153.06,…… -
Java – namedentitygraph – JPA / hibernate.org hibernate. loader. Multiplebagfetchexception: cannot get multiple packages at the same time
We have a project where we need to load a collection of entities lazily, but in some cases we need them to load them e…… -
Java – is the resource import order important in spring XML?
Suppose I import four resource files in the main configuration file of the application, as shown below, <import res…… -
java – guava-libraries：Objects. Is hashcode (object []) collision safe?
When looking at the different options for overriding hashcode (), I was directed to objects. In Google's guava librari…… -
Java – how do I force an OutputStream object to refresh without closing it?
My problem lies in the following assumptions. I hope these assumptions are correct, because I believe these are what I…… -
Get the public DNS of Amazon EC2 instance from Java API
I have managed to start, stop and check the status of EC2 instances previously created from the Java API However, it i…… -
Lombok is related to Java 8
I just upgraded to IntelliJ idea 14 and Java 8. I also want to upgrade my project to Java version 8 and start using so…… -
Java – JSP / GlassFish: how to correctly set UTF-8 encoding
I'm looking for help to convert all layers in the stack to UTF - 8 encoding I found this good article: http://www.java…… -
Location parameter problem in Java – JPA Native Query
I'm trying to: String sql = "SELECT email FROM users WHERE (type like 'B') AND (username like '?1')"; List results = e…… -
Java – different log4j layouts for debugging and errors?
In log4j, is there any way to make logger Error ("") and logger Debug ("") contains different output layouts? I think …… -
Java – what kind of maze solving algorithm is this?
I tried to find out if this algorithm was a * (A-star) algorithm or something, but I was still confused Stack<Cell&…… -
Java – running Axis2 client version 1.5
So I'm trying to get the client to connect to the soap service I'm running through Axis2 I tried two methods. One is t…… -
Combining two functions in Java 8
In the isreadytodeliver method, if all products in the order are available (productstate. Available) and the order sta…… -
Java – how to merge a single selected PDF file into one PDF when downloading?
How do I merge a single selected PDF file into one PDF when downloading? I want to achieve the following goals: http:/…… -
MacOS – clojure dependency for Java 1.5 only?
I hope this is not the subject of so (I hesitate between so and programmers. Stackexchange), but as far as I know, thi…… -
How do I know if a Java se class or method is thread safe?
For example: static private DateFormat df = new SimpleDateFormat(); public static void format(final Date date){ fo…… -
Java – COM / MySQL / JDBC / Driver: Unsupported major Minor version 52.0
When I was in Apache Tomcat / 7.0 52 (Ubuntu) deploying my war using MySQL connector - java-6.0 3. Jar encountered thi…… -
The static of Java and the self of ruby
Is it static in ruby, like self in ruby? Solution No, the static nature of Java has nothing to do with Ruby's ego Java…… -
Java – Maven project design – share a common project
I'm new to maven, I'm trying to convert some projects into Maven work, and I'm not sure what's the right way to build ……