Java
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Java – how to execute unit tests using threads?
Executive Summary: when an assertion error is thrown in the thread, the unit test will not crash This makes sense beca…… -
Java – why the super class method?
class One { class One { public void doThing(One o) {System.out.println("One");} } class Two extends One{ public…… -
java – httpURLConnection vs apache commons http
I just want to know if you have any problems using the Java default httpurlconnection class A bug that lets you switch…… -
And Java util. stream. Stream processes two lists in parallel
For each element in each list, perform an action Elements can be processed in any order For example, in old Java: List…… -
Java – querydsl – case expression with string value
QueryDsl 3.3. four public class Document { private Confirmation confirmation; } public class Confirmation { .…… -
User interface – which is a better tool for BlackBerry application development?
Which GUI development option provides an optimized and faster GUI for BlackBerry applications? Solution There is no do…… -
How to find the time complexity of recursive methods in Java?
I can't fully grasp the concept of complexity. I want to know how to calculate it for method f (n) in this Code: impor…… -
Java – is there anything better than calling arrays Aslist is a better alternative to list initialization?
Is there a better alternative to using arrays Aslist as a list batch initialization program? Worryingly, this one is v…… -
Java – how to deeply copy 2-dimensional arrays (different row sizes)
This is my first question in such a community, so my format may not be very good. Sorry Since my problem is that I wan…… -
Java – a rest service that accepts and returns objects How to write client?
I have announced two rest web services A simple return of an object Others accept one object and return another @XmlRo…… -
What is Java util. Random. O (n) of next (n)
I want to know Java util. Random. Is next (n) linearly proportional to N or a constant? Can someone help me with this …… -
Why should a Java – 12 factor application be self-contained?
In the 12 factor article on Port Binding Solution To understand the rules for port binding and self-contained applicat…… -
Java – can you confuse code with unit tests?
I wanted to confuse our Java Web application code in our existing ant build script, but I encountered a problem with u…… -
Java – passing ArrayList to a separate class?
I have a code to read from the SQL database and save each column of information to the ArrayList I need to pass each A…… -
Java – does creating a new thread have the side effect of refreshing the cache?
I wonder if creating a new thread in Java will trigger a cache refresh Suppose I do this in the following order: >T…… -
Java: enumerating values () and valueof (string)
Why does javac add the value () and valueof (string) methods to the enumeration type being defined? Wouldn't it be bet…… -
Java – export jasperreports in HTML format
The following code gets a byte [] result, which is applicable to PDF and xlsx An exception was thrown for HTML JasperP…… -
Pass Java map to C method using swig
I have a method defined in C: std::map<std::string,std::string> validate( std…… -
Trace the Java / Android stack to a unique bucket
When a stack trace of unhandled exceptions is recorded in Java or Android (for example, through acra), the stack trace…… -
Java – how to create a generic type safe HashMap by class type?
See English answers > java map with values limited by key's type parameter5 Later, I want to pass the class type an…… -
Java – should I override the hashcode () of the collection?
Given that I have a number of courses that cover a variety of areas: class MyClass { private String s; private…… -
A filled list with an empty vector causes its length to change
In the following code, I expect something of length 96, but I get a list of length 48 Can you explain the result? num_…… -
Java – log in and play non blocked?
Log in to play non blocked? Does it use some non blocking IO APIs behind the scenes? Is it scheduled in some other thr…… -
Randomize text files read in Java
I try to read a text file in Java, which is basically a set of problems There are four choices and one answer The stru…… -
java. Lang. internalerror: callersensitive comment expected in frame 1
In a static method (annotated with @ callersensitive), I try to get the name of the calling class: @CallerSensitive pu…… -
Java – jeooq does not generate Dao with flag set to true
I have refreshed my project, rebuilt it cleanly, searched for similar problems in stackoverflow with Google, read the …… -
Is there any way to use typescript in my code Collections. HashTable？
I saw the implementation of "hashtable" in the code of typescript compiler (in the file Src / compiler / core / hashta…… -
Java – tag interface
Can anyone explain the contract of marking interface in Java? For ex: if clonable is a tag interface without fields / …… -
Java – use graphics2d to draw images with sub-pixel precision
I'm currently trying to draw images on the screen at normal speed, just like in a video game Unfortunately, due to the…… -
Use ‘STD:: vector’ containing incomplete types to recursively define and access’ boost:: variant ‘– libstdc vs libc
I tried to use the incomplete wrapper class and STD:: vector as my indirect technique to define and access the "recurs…… -
In Java cross plateform ably, there is no time to seed the random generator
I initialize two random number generators on two threads almost at the same time. I want the behavior of the two gener…… -
Java – how to verify whether an exception is thrown
In my unit tests using mockito, I want to verify that NullPointerException is not thrown public void testNPENotThrown{……