I have a long variable which represents the downtime of an application in seconds. I want to display the downtime as HH:mm:ss When passing the long variable to the Date I multiplied it 1000 to get the millisecond value. The newD variable evaluates to Thu Jan 01 01:12:35 GMT 1970 The value of newD is off by 1 hour, 755
Is it possible to resume Java execution after exception?
I have a ParentClass in a JAR, but not source code. I am implementing a SubClass, but i need to handle some corner cases. Is there a way to run the //lots of code 2 part after handling the exception in the overriding method? I don’t want to duplicate code, and cannot modify the ParentClass. P.S: The NullPointerException problem wasn’t
Java Stream filter with regex not working
hope somebody can help me. I have a ArrayList of a Invoice class. What I’m trying to get is to filter this ArrayListand find the first element which one of its properties matches with a regex. The Invoiceclass looks like this: I’m filtering with this regex (\D+) in order to find if there is any value in the orderNumproperty that
Matrix multiplication in Java using 2D ArrayLists
I am trying to implement a simple matrix multiplication in Java, where I am storing the matrices in two-dimensional ArrayLists. It would seem the error is caused by the setting of matrix Result, inside the nested for loop, but I do not understand why. The code produces the result: when in fact it should be: Answer The Result is incorrectly
Logging in AWS Lambda with slf4j
I am using a lambda function and writing it in Java. I was looking up logging for Lambda functions when I read the docs and they support log4j – http://docs.aws.amazon.com/lambda/latest/dg/java-logging.html#java-wt-logging-using-log4j. I was wondering if we could use logging using the Slf4j annotation as well since Slf4j is only a binding annotation. Has anybody tried using Slf4j before with lambda? Answer
Where to place module-info.java using Java 9?
I have an OSGI application and I have around 30 bundles (jar files). Today I decided to see how it works/if it works with Java 9. So I started my application and got After some reading I added command line option and created file module-info.java with the following content: And I have two questions. Where should I place this module-info.java
How to overcome the FCBL_FIELD_COULD_BE_LOCAL issue in FindBugs?
In FindBugs, I am getting an issue like FCBL_FIELD_COULD_BE_LOCAL on the class name line of this code: How can I resolve this issue? Answer In order to resolve that issue you need to use you fields somewhere in your class. What FindBugs is telling you is that your fields in your class are never used as the fields. How you
Inno Setup: Removing files installed by previous version
I’m using Inno Setup to package a Java application for Windows; the application tree is like this: I use Ant to prepare the whole tree (all the files and folders) beforehand, including the lib directory (using *.jar wildcard to copy the dependencies), then I simply call ISCC with: Now, I need to cleanup the lib directory everytime the user upgrades
How to change log level only for current thread with Logback
In Logback, the log level of a logger can be changed with setLevel() method. But in Logback, because the loggers are singleton, the call of setLevel() method will affect to all other threads that use same logger. Now I have a class used in a web application like this: And in Spring ApplicationConfig.xml: I want to log call of insertRecord
java.util.arraylist cannot be cast to java.lang.object[]
So in my code below, line marked with *** gives me the exception java.util.arraylist cannot be cast to java.lang.object[] I am trying to retrieve a list of users from backendless. I have created a list view that works when normally adding to list. but not when trying to get the response(Object) Answer what you are doing looks a bit long