包含标签:Java 的文章
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Java equals(): reflect or not
This problem is related to the equals () method of objects that cover a large number of fields First of all, let me sa…… -
Java – set powemockito static
I want to use powermock and mockito to simulate some static method calls I have followed the instructions and examples…… -
Java – how to run a single JUnit test method in eclipse?
There is already an answer to this question: > running a single JUnit test in eclipse 12 For example, how to run a …… -
Macros in Java?
I know there are no macros in Java, but there is a solution to do this: #ifdef _FOO_FLAG_ import com.x.y.z.Foo; #else …… -
Virtual machine – how does the vagrant package save changes to the new box
My question is about this here, but I didn't let it work I use from vagrant@R_355_2419 @.es( http://goo.gl/KwQSa2 )I …… -
Java – taglibs and variable declarations generate blank lines at the top of the source page
I declared some taglibs and variables in the JSP page, as follows: <%@ page language="java" contentType="text/html;…… -
Calculate Sha 3 hash in Java
I have been using the Sha-3 hash from the cryptojs (i.e. cryptojs. Algo. Sha3. Create()) library to the front end (see…… -
Java – used in Apache POI instead of the deprecated cellrangeaddress valueOf
I wanted to add conditional formatting in this region, but one of the methods I saw in the tutorial has been deprecate…… -
How to randomly select a letter (A-Z) in Java?
If I want to randomly select a letter between a and Z, I assume I have to use the random class: Random rand = new Rand…… -
Java-8 – why can’t @ functionalinterface be applied to Sam abstract base classes
I just started learning camels. The first thing I saw was context.addRoutes(new RouteBuilder() { public void c…… -
Conditional if else statements in Java
See English answers > why does the internal operator unexpectedly cast integers? two public class Pre { public …… -
Java – extends activities in the navigation bar to other activities
I'm trying to create a navigation drawer activity, so I can expand the activity, use menus in all activities and follo…… -
Java – why this numberformatexception?
I have this stack trace (part) Servlet.service() for servlet action threw exception java.lang.NumberFormatException: F…… -
Why does Java use merge sort to sort arrays larger than element 7
According to Wikipedia: But why? Both merge sort and quick sort are o (n log n) Solution The difference of the algorit…… -
Is there a “best” or most popular database with stand-alone Java applications?
Is there a "best" or more popular database with stand-alone Java applications? Update: talk about small applications (…… -
Java – jasperreports is exported to xlsx instead of XLS
I can't find how to export jasperreports 4.1 1 Xlsx file JRXlsExporter There is no xlsx equivalent I can't find a para…… -
Java – Android – open or restart the application after clicking the push notification using the flag activity
I use push notifications in Android When I receive a push notification, if the application is still running, I want to…… -
Create a zero int array in Java
How do I initialize all elements of an array to 0? for example int[] array = new int[10]; return array[2]; Should retu…… -
Java – maps strings to integers
The simplest method in Java is to map a string (Java string) to a (positive) integer (Java int) >Are equal strings …… -
Java – split screen in libgdx
The question is short and simple How to create split screen effect in libgdx If I create two cameras, it will draw one…… -
Java – factory pattern dynamic method
I'm trying to understand the factory model If there are many implementations, there will be many switch cases in my fa…… -
Java – it makes sense to override the methods in the interface
There is already an answer to this question: > why Java 6 overrides keyset(), entryset() and values() interface in …… -
Avoid checkstyle magic number errors in JDBC queries
I'm having a group project in class. We're trying checkstyle I'm very satisfied with Java, but I've never touched JDBC…… -
. Net and Httpwebrequest are equivalent in Java?
. Net has Httpwebrequest and webclient to simulate browser requests I will Google, but I don't know what keywords to u…… -
[ljava. Lang. object; cannot be discarded
I want to get the value from the database. In my case, I use list to get the value from the database, but I receive th…… -
Java: cloning arbitrary collections by referencing collections
Suppose you have a method of type Java util. Collection, and it can't be said which Java it will point to at run time …… -
Java – why do we have immutable empty maps?
/** /** * Returns the empty map (immutable). This map is serializable. * * <p>This example illustrates the t…… -
Java – WebService call timed out from the client
I am using resteasy client to call WebService One requirement is to abort / timeout the call if the running time excee…… -
Java – how to create a global variable in Android?
See English answers > 12 Android global variables I've tried to put it in a custom class, but the problem is that i…… -
Java – use App Engine to customize the data storage location on the local computer
I am developing App Engine Application in Android studio and testing it on the local computer (using local data store)…… -
Java – why compile code with consecutive semicolons?
According to my scientific Java experiment, int x = 0; Equivalent to int x = 0;; This is equivalent to int x = 0;;;;;;…… -
java. Lang.illegalargumentexception: the observer is null
A user of one of my applications reported this error I'm confused about how to solve what it means After a Google sear……