包含标签：Java 的文章
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selenium – junit. framework. Assertionfailederror: test not found in register
I had a problem making this test case work Who can point me in the right direction? I know what I did wrong. I just do…… -
Strange array behavior in Java
This is a simple array declaration and initialization int arr[] = new int[10]; for(int i = 0; i<arr.length; i+…… -
Java – how long does the HTTP connection remain open when we use the asynccontext mentioned in the servlet3 specification?
How long does the HTTP connection remain open when we use the asynccontext mentioned in the servlet3 specification? fi…… -
java – Android . The AAR library interface parameter name is missing
I use Android studio (1.2.2) I built an Android module library, which declares an interface: public interface myInterf…… -
Java – SQL SELECT statement with where clause
How do I write this SQL statement without a hard coded value? resultSet = statement .executeQuery("select * from m…… -
Java – different methods for mapping spring requests to specific path variable values
@Controller @Controller @RequestMapping("/authors") public class AuthorController { @RequestMapping(value = "/{id}…… -
Java – which method works best when I traverse a list?
List<T> list = new ArrayList<T>(); List<T> list = new ArrayList<T>(); 1 method: for(int i = li…… -
Java – the class ref in the pre validation class resolves to an unexpected implementation
I am using Android studio and developing the xposed framework module Most of my users can use my application normally,…… -
Why can’t I programmatically close the dialog on JavaFX?
This code example shows but does not turn off JavaFX on JavaFX scene. control. Dialog： Dialog<Void> dialog = ne…… -
Java – debug in GWT 2.7 super development mode. Is stacktrace missing?
I just got from GWT 2.5 1 migrate to 2.7 and use superdev mode for the first time com.google.gwt.event.shared.Umbrella…… -
Java – disable spring security authentication in specific methods
I use spring security 4.0 on my application I have a registration page in my application and I want to exclude this pa…… -
Java – when my application is in portrait, use the camera in landscape
I have tried various ways to achieve the behavior I want, but there seems to be no work My application is locked in po…… -
Java – the compiler says the return statement is missing, but I already have 3
It's strange My compiler says I missed a return statement, but I already have three public int tortoiseMoves() { i…… -
Convert a string into a decimal number with 2 decimal places in Java
In Java, I try to parse a string of formats "####. ##" into floating point numbers The string should always have 2 dec…… -
Java – LL1 Boolean operator grammar implements a recursive parser
This is a small piece from the original syntax, and I have to implement the correct parser for recursion We must remov…… -
Java collection filtering
I have such things: public class Foo { public String id; } and Vector<Foo> foos; I need to get an object from …… -
Java-8 – disadvantages of the javac – parameters flag
I want to try some framework functions that require parameter names at run time, so I need to compile my application w…… -
Java – access modifiers and methods for superclass references [copy]
See English answers > understanding Java's protected modifier 6 package pet; public class Dog { protected void…… -
Java – error (?) in OS X with Jfilechooser UI
Like many others, I have encountered and seen this problem endlessly in this forum Unfortunately, I have never answere…… -
Java – when putting a new row into the MySQL table Created add what URI
I'm doing a restful service. I use post sometimes. I add a new row to the table Therefore, it seems a good idea to suc…… -
Java – get all keys by the value of a table column
I have a tabular data representation in Java In view of this table |----------------------------------------------| | …… -
Java – no message body writer found for multipart body, multipart / form data
I upload XML files by calling rest URL through CXF client: WebClient webClient = WebClient.create("some base uri") …… -
Java okhttp reuses keep alive connections
How to reuse HTTP keep alive connections through okhttp? My code example: public class MainWithOkHttp { static Ok…… -
Multithreading – clang thread safety annotations and sharing capabilities
When I use clang thread annotations, the following code generates a warning I'm trying to wrap boost:: shared_ Mutex a…… -
Java – how do I load all compiled classes from a folder?
I have a folder operator In this folder, I have compiled files (an interface operator and class 4 implementation opera…… -
Multithreading – is calling binaries such as LS or RM a bad Perl exercise?
I find Perl easy to do the following: print "File not found,valid files are:\n\n".`ls DIRECTORY | grep 'PHP'`; `rm…… -
How to solve the exception in thread “main” Java Lang.nullpointerexception error
See English answers > what is a NullPointerException, and how do I fix it? 12 java.lang.NullPointerException at two…… -
Java – why objectoutputstream Readobject() accesses MyClass readObject()
I'm reading the basics of Java io. I see that in order to use the custom writeobject function in a class, it must be d…… -
Which collection is used in Java?
I want to map integers to strings. They are one-to-one, for example: 60 : c 61 : c# 62 : d 63 : d# 64 : e 65 : f 66 : …… -
Java – what is the purpose of using reflection to modify strings?
I'm reading article, which says that Java strings are not completely immutable However, in the article's sample code f…… -
Java – the difference between a = B and a = a
In Java, I really want to know if there is a difference between using a = B; Or a = a, B Which one should I mainly use…… -
Java – why doesn’t Android clean up memory after completing the activity?
In my case, I have two activities called a (main activities) and B (children's activities) If I use Android memory mon……