I am using IntelliJ IDEA on ubuntu. I added lombok.jar into my project and installed the Lombok plugin for IDEA. I have access to the annotations but the getters and setters aren’t generated. I get the same errors I would get if I tried accessing a getter or setter method that doesn’t exist. What …
Tag: java
How to return a text file with Spring MVC?
The string is generated inside the Controller. What I want is to send back to the user a Window where he can save a file which contains the myString. It clearly doesn’t work in this current state and I am stuck at the moment. Answer here is a sample: PS: don’t forget to put some random stuff in yo…
How to use DispatcherListener in Struts 2
There is a interface DispatcherListener in Struts2. The docs says “A interface to tag those that want to execute code on the init and destroy of a Dispatcher.” But how to use this interface. If I create a class that implements this interface, how should I configure it to Struts2? Answer When a Dis…
Check if a given time lies between two times regardless of date
I have timespans: String time1 = 01:00:00 String time2 = 05:00:00 I want to check if time1 and time2 both lies between 20:11:13 and 14:49:00. Actually, 01:00:00 is greater than 20:11:13 and less than 14:49:00 considering 20:11:13 is always less than 14:49:00. This is given prerequisite. So what I want is, 20:…
Convert UTC into Local Time on Android
In my project, I have get the API response in json format. I get a string value of time in UTC time format like this Jul 16, 2013 12:08:59 AM. I need to change this into Local time. That is where ever we use this the app needs to show the local time. How to I do this? Here is
Java JEditorPane – Trying to edit an html tag value and getting Exception
I have a JEditorPane and I’m trying to edit one fo the html element attributes, basically changing the the src x value in to a custom value The code I have is: I get the following exception in the before last line when I try to remove the existing attribute (because you can’t replace): I read a fe…
BufferedReader vs Console vs Scanner
Hi I’m new to Java and I would like to know what is the best choice to read a user Input in the console, as far as I know there are 3 ways to do it: Console console = System.console(); BufferedReader input = new BufferedReader(new InputStreamReader(System.in)); Scanner reader = new Scanner(System.in); W…
Efficient way to extract protocol data units from tcp byte stream
I’ve had two java projects (simple multiplayer games) that relied on a byte-based connection-oriented protocol for communication. In both cases I was unhappy with the implementation of the communication, since I couldn’t come up with an intelligent, non-verbose and object-orientied way of writing …
System stack allocation in recursion
As we all know that all most all recursive functions can be modified to iterative approach. Suppose we take an example of adding two linklists which represent two huge numbers. This question can be solved either by recursion (which uses system stack) or iterative (explicit stack usage) approach. My doubt here…
Wrong time calculated in minutes from two Date objects to calculate duration
I am trying to calculate the duration between two date objects in minutes. I have found some inspiration during my research from this stackoverflow question. In generally this seems to work correct, …