Java
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Matching non spaces in Java
I want to detect strings that contain non white space characters Now I'm trying: !Pattern.matches("\\*\\S\\*",city) Bu…… -
Download – IE9 streaming files to browser when suspended
I use the following methods to stream files (usually Excel or PDF) to my browser It operates by setting the location o…… -
Java – access annotations in UIMA
Is there any way in UIMA to access annotations from tokens as they are in the CAS debugger GUI? Of course you can acce…… -
Java – if you have only one write thread, do you need special concurrency?
Assumptions: >Only one specific thread can set a reference field (not long or double, so writing it is atomic) >…… -
Java checkstyle – constructor definition for wrong order
I have a course that looks like this: public final class OrderedSetList<T extends Comparable<? super T>> i…… -
What tools are available to audit changes to Java interfaces?
Does anyone know of any tool that can summarize the changes of Java interfaces between different versions? (by interfa…… -
Java – how to reload a resource package in a web application?
I use the resource bundle as a Java class to read values from the database When I update dB, I need to reload the bund…… -
Algorithm – the large O and Ω of the worst-case running time are the best cases, but why do you sometimes use Ω in the worst case?
I'm confused. I think you use big O runtime in the worst case. Ω is the best case? Can anyone explain? Not (LG n) the …… -
Java 8 stream – why is the filter method not executed?
See English answers > why does java8 stream generate nothing? 3 Stream.of("d2","a2","b1","b3","c") .filter(s -&…… -
Java – why are indexes inclusive but exclusive?
In Java API methods, such as: > String. substring(int beginIndex,int endIndex) > String. subSequence(int beginIn…… -
Java – when the field vars is final, do you need a getter?
In Java, the Convention (for me) is to make your field variables private and use getters and / or setters to access th…… -
Java – get the full string stack trace containing the inner exception
Java's e.printstacktrace() does not print all the details of the stack trace of the inner exception Is there a ready w…… -
java. io. File (parent, child) does not work properly
I'm trying to build a java file object based on the file name provided by the user (which can be absolute or relative)…… -
Java – how does this division approximation using displacement operations work?
In Java util. In dualpivotquicksort, the following line of code appears: // Inexpensive approximation of length / 7 in…… -
Java Generator for Poisson and Uniform Distributions？
According to my understanding, the standard generator is used for normal distribution I have to generate random number…… -
Help is needed to find the vid / PID of the USB driver connected to the system through Java code
I need to find the supplier ID and product ID of the USB driver connected to the system through Java code. Any suggest…… -
Java – servlet forward response caller / previous page
I tried to forward the servlet response to the same page it came from (a.k.a: Previous page, or "servlet" caller) I've…… -
Java – can I select null as the column value in the HQL query?
I need a list of three columns Columns 1 and 3 have values, while column 2 is empty I need something like this: select…… -
Java – compilation failed; For more information, see compiler error output
When I try to compile build XML file, the following error is: BUILD Failed C:\Users\workspace\testrepo\src\build.xml:3…… -
Java – change JSP button click
I have a question I have three JSP pages The first is a menu with two buttons When I click the first button, I want to…… -
Java – is there any special reason for eclipse generated equals to use the values of 1231 and 1237 as Boolean values?
The title basically explains everything I tried Google search, but returned a lot of false positives I think I just wa…… -
Java – are local variables in static methods also static?
I wonder if we declare them statically, all local variables will become static? For example: public static void A(){ …… -
Strange floating point behavior in Java programs
See English answer > is floating point math broken? 29 0.0 + 0.04 = 0.04 0.04 + 0.04 = 0.08 0.08 + 0.04 = 0.12 0.12…… -
When reading from a file, Java net. URL cache
It seems that Java is saving some kind of cache for URLs (& files) new java.io.BufferedReader (new java.io.InputSt…… -
Java – zoneddatetime as pathvariable in spring rest requestmapping
I have a rest endpoint in my spring application, as shown below @RequestMapping(value="/customer/device/startDate/{sta…… -
Java – alternatives to Commons beautils
I am looking for an alternative to public beautils I want a small independent alternative that will lead to no / minim…… -
Java – get value from JTable cell
I listed editable columns in JTable When I finish editing the cell, I want the old value of a cell Solution You can ge…… -
Java – condition – should be unlocked before waiting?
Can you tell me if I should release the lock before waiting for the condition? try { lock.lock(); while (isNot…… -
Java – the correct way to find enumerations by value
I have several Java enumerations that look like the following (edit for confidentiality, etc.) public enum Presentatio…… -
What is the c# equivalent of Java’s class type?
In Java, it is convenient for class to use the generic parameter X But c#'s type class doesn't have this So in c#, how…… -
Java – check the current exception in the eclipse debugger?
If a Java application throws an unhandled exception, it will cause eclipse to break at that time Is there any way to c…… -
Interface array in Java
I have an interface a: interface A { } Then I have a level B: class B implements A { } Then I have a way to use the a ……