包含标签：Java 的文章
-
Java – how to schedule a task every “n” seconds in the spring framework
How to connect to my web XML task occurs every N seconds In addition, I need to refresh the server method every 5 seco…… -
Java – why does this nested ArrayList code throw an exception?
ArrayList<ArrayList<Integer>> a = new ArrayList<ArrayList<Integer>>(5); ArrayList<ArrayList…… -
Java – why does concurrentmodificationexception appear when deleting from HashMap?
I want to delete a project from HashMap by applying criteria Consider the following codes: Set<Foo> set = myMap.…… -
Java Naming Convention
I've been studying Java hard for the past week, and so far I've been able to generate reasonable code However, I seem …… -
Dynamic array in Java
What I want to do is ... int sum[]; ... for(int z.....){ ... sum[z] = some_random_value; ... } But it gives a…… -
Loop problem in Java
What is the error in the following code? while ((char t==(char) system.in.read())!='0') Solution You cannot declare a …… -
Java – how to generate a unique ID on a web server cluster
In the following scenarios: 1 database 4 web servers How does the web server generate unique IDs for databases to make…… -
Why doesn’t Java use the out parameter in c#’s language syntax?
Although I'm not a big fan of using the out parameter in c#, I wonder why Java chose not to include it in its language…… -
How many threads run in Java?
I have this wonderful idea to speed up the time required to generate 36 files: use 36 threads! Unfortunately, if I sta…… -
Java – is it acceptable to always use ‘this’ as a monitor lock?
For example, I have a class with 2 counters (in a multithreaded environment): public class MyClass { private int cou…… -
Call the child method when converting to the parent type in Java
I am trying to complete some course work. Any help will be appreciated! I have three types of accounts that extend the…… -
Java – Android studio autocomplete
I just switched to Android studio, and even with a few errors, I think it's much better than eclipse However, somethin…… -
Java – syntax error: Insert ‘}’ to complete the block
My code keeps going wrong I'm making an application to generate quotes Who can help me with this? Whatever I try, I ge…… -
Exception in hexadecimal to int number format in Java
I encountered a number format exception while trying to do this int temp = Integer.parseInt("C050005C",16); If I reduc…… -
How to get elements from Java ArrayList
I have a basic question I have this ArrayList: @Named("AccountProfileController") @ViewScoped public class AccountProf…… -
Are there any Java APIs or built-in functions to solve annuity problems?
My boss asked me to create a module to calculate reverse compounds The question is: if I want to achieve $1.000 in 24 …… -
Java – how do I check the number of objects created in heap memory?
I want to see how many objects Java creates when running the program My intention is if I use the code string s = new …… -
Java – handling 401 errors (spring security)
I can handle 404 errors @ResponseStatus(value = HttpStatus.NOT_FOUND) @ExceptionHandler(NoHandlerFoundException.cl…… -
Java – manage MySQL partitions using hibernate
We are currently evaluating the use of MySQL partitions for our small applications The application is basically at the…… -
Java – what are the benefits of having multiple logger instances instead of just one static logger class?
So I checked the best practices on logging in Java (slf4j, log4j, logback, etc.), and it seems that the appearance of …… -
Java – cross platform desktop development
I need to provide cross platform engine / framework suggestions for desktop PC application development (windows, MAC, …… -
The Java – ini4j store method changes the comment character
I want to change the key entry in part of the INI file I use the ini4j library So I wrote the following code I can cha…… -
Java – can I add keys / values to a map in a map in one line of code?
I have HashMap 1, which contains five keys. All keys have hashmaps as the value I want to add key / value pairs to the…… -
Java – wowza authentication using external jars
This is the source code of jar: public class WowzaTesting { boolean authStatus = false; public boolean authen…… -
Java – get different results when rounding decimals
double radius = 5; double radius = 5; double area = Math.PI * Math.pow(radius,2); // System.out.println(ar…… -
Java – resource never closed in try with resources when method linking
try(InputStream in = url.openStream(); Scanner scanner = new Scanner(in).useDelimiter("\\A")) { try(InputStream in = u…… -
Java – error running calendar API sample code
Attempt to implement from https://developers.google.com/google-apps/calendar/quickstart/java Started Google calendar c…… -
java. io. Is filewriter designed for one-time use only?
I'm using Java io. Filewriter builds a program that keeps writing to the same file During runtime, whenever I need to …… -
Java – Tomcat uses defaultservlet to get static content in external directory
I have a simple web application that allows users to upload and access files When users access uploaded files, the ser…… -
Java – recursive code that runs slowly on the UNIX box but fast on windows
I have a java code, which is a combination of while loop and recursion The problem we face is that for the UNIX box [H…… -
The Java chrome selenium CI test was suspended randomly for 3 hours
Our CI Java chrome selenium test hangs randomly for 3 hours before socket timeout We get an error: 2015-08-31 10:18:47…… -
Java – Jfilechooser with custom filesystemview implementation
I extend filesystemview and override every method in this class The model is as follows: public class RemoteSystemFile……