This is my example code using tasklet in spring boot. My problem is: I want to throw exception from afterstep(), but the interface does not allow it. Despite this limitation, why I obsessed with afterstep() is that I want to make abstract class to make Tasklet template which can verify each execution in afterstep(). I want verification to run after
Tag: exception
How to handle empty scanner input strings in java?
I’m working on a .xml file generator. It works by asking the user to input 5 different values and then using them for generating a .xml data container. This is the code: I want the program to detect when someone inputs an empty string by pressing the enter key with no written text and print a message asking the user
Java. Handle dead code (by application logic) in catch block
I have the following piece of code. Is there a better way to handle the dead catch? The “file” variable is loaded by a resource manager, that already handle the case of a file not found (by throwing an exception itself). This is “dead code” only because of application logic, if it was not for the manager doing the check,
How can I make my program run the validation code in my sub-class rather than the parent class?
As the title suggests, I was wondering if there was a way to make my program execute the validation code in the constructor of my sub-class, instead of the validation code in the constructor in my parent class? Here is a very basic example: Here I have the constructor of my Teacher class, which throws an exception if age <
How to hide a method from Stacktrace but not its exception?
I am facing this situation where I have my method which throws some exception. I mask the exception so that it is not shown what exactly is, however in the stack trace the method it comes from is also shown. The code is something like this: In the stacktrace I get: I would like to remove this methodForHiding from the
Way to overcome fail-fast iterator in HashMap
In competitive programming, I was solving a given problem – given an array nums of non-negative integers, and a target sum S, we have to find out the number of ways we can obtain target sum from sum of given numbers (where each nums[i] can be taken as nums[i] or -nums[i]. Although I came across some solutions that mainly relied
Problem resolving an android.content.res.Resources error
I understand that this error has been addressed severally and I’ve checked most of them like Android: android.content.res.Resources$NotFoundException: String resource ID #0x5, android.content.res.Resources$NotFoundException: String resource ID to see if I could find a solution to my problem but I couldn’t and most of them are hard to understand. I can’t tell if my code is an int/string so I don’t
is checking if a file object exists redudent and bad style when you have a try, catch block?
Is it overly redundant and considered bad style to check that the file object exists before a try catch. Since the FileNotFoundException would be called anyways if the file object did not exist? Answer Yes, the exists test is redundant. An implicit existence test happens within the Scanner. (Actually, it occurs in the syscall that opens the file.) And it
Java: Why does my program receive java.io.FileNotFoundException error for creating an input file when it successfully creates an output file?
I created two files in this program: “OutputFile.txt” and “InputFile.txt”. When I run my code, it displays an error called “java.io.FileNotFoundException” but it created “OutputFile.txt” in my system but not “InputFile.txt” Why is that? Answer 2 File objects are created: outFile and inFile, this will create text files in my system The first part of this is correct; the second
Why RuntimeException is not caught in catch block if there are multiple catch blocks?
I am able to catch RuntimeException or subclass of it with below code: But I am getting error with below code and not able to catch RuntimeException in Exception catch block. I searched for the same type of questions but did not find a suitable answer. Can anyone explain why the behaviour is different? Answer In the second example you