包含标签：Java 的文章
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Java – won’t Android studio let me use switches on strings?
I'm creating an Android Application in Android studio and trying to create a switch case on the string As far as I kno…… -
Java – why do I throw a NullPointerException
So it's a winter vacation for college, and I'm trying to be sharp in coding, so I just write the code of programs and …… -
How to calculate a good hash code for a large list of strings?
What is the best way to calculate a hash code based on the value of these strings in a pass? OK, I mean, it needs to: …… -
Java – tag interface
Can anyone explain the contract of marking interface in Java? For ex: if clonable is a tag interface without fields / …… -
Why is java safe compared to other programming languages?
Java vendors and communities say that "Java is more secure than other languages." But I want to know what? If we look …… -
Java – use jersey-spring3 to retrieve managed beans from the Jersey test container
This question is derived from the previous question specify custom application context We are using Jersey spring to b…… -
Key of string in Java RSA
I use RSA encryption in my application To store the generated public key, I convert it to a string and save it in the …… -
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 …… -
JBoss – jee6 rest service @ aroundinvoke interceptor is injecting an empty HttpServletRequest object
I have a @ aroundinvoke rest web service interceptor. I want to use it to record common data, such as classes and meth…… -
Java – declare and throw and throw without is declared exceptions
What is the difference between dual methods in Java? public void methodA() throws AnException { //do something …… -
Java assert double is Nan
I try to assert that my double is Nan private Double calculateIt(String input){...} assertEquals(Double.NaN,calculate…… -
Java – sort using spring AOP \ u0026 \ u0026 MVC
I am trying to use spring AOP and spring MVC controller @Aspect @Component public class LoggingAspect implements Order…… -
Java – why doesn’t this code see any significant performance improvement when using multiple threads on a quad core machine?
I wrote some java code to learn more about the executor framework Specifically, I wrote code to verify Collatz hypothe…… -
Java – use JSTL tag to escape JSP el (dot character)
Some frameworks (spring, Tomcat itself) add servlet request attributes that cannot be used in El expressions by defaul…… -
javax. Mail What should I do with the debug = true option?
In my javax mail. In the configuration property of session, I set mail Debug = true, but for some reason, this does no…… -
Java – how to avoid creating redundant entities?
In my current project, I need to execute some native queries. These queries select some fields from the tables connect…… -
Java – use the account manager to authenticate using the Google API
I've been trying to solve this problem for days I'm trying to dial Google calendar using authentication through Androi…… -
Controlling logging levels through the WebSphere administrative console
I have a web application in which I use Java util. logging. In my logging In the properties file, the default level is…… -
Java – JAXB: how to customize XML serialization of two fields
I have a legacy class with many public double fields Use double MAX_ Value initializes all double fields to indicate t…… -
PowerShell – hashtable and custom object array about iteration
I often write lists of things and enumerate them to perform some get / set I hate enumerating hash tables because when…… -
java – Arrays. Sort (object []) did not throw ClassCastException
Code: public class CompareTest { public static void main(String[] args) { ArrayList list = new ArrayLis…… -
How to run sudo command for OS X in Java
I'm using the app in JavaFX. I'm trying to open an application using the command in the terminal. I'm using my java co……