I’m trying to make a multi-language app with messages inside multiple *.properties files. I’ve started working on something like this: Now, there’s a lot of messages, and I don’t feel like typing the same thing each time (plus there could me typos which could be an issue…). The f…
Tag: final
Java compiler wrongly marks varible as might already have been assigned to
For some reason java compiler marks the lower str variable as “might already have been assigned to” although this scenario is not possible (at least so I think). any idea why? I know removing the final modifier will solve it but I would like to understand the reason… using java 15 on intelli…
Does final variables occupy memory on a per-instance basis?
I have read other question-answers regarding final instance variables and i came to knew that non-static final instance variables are created in heap for every instance of the class but in java -the complete reference by herbert schildt it is said that : Variables declared as final do not occupy memory on a p…
Variable might be assigned in loop?
I don’t know why the code is not compiling when final variable is initialized in loop and loop iterate only one time? Is Loop is somehow running more than one time and multiple assignments is done to variable x? Answer The compiler does not care how many times the code in the loop will be executed at ru…
multiple constructors for final fields in java
I have some final fields in the class like But this gives an error that final field ‘b’ might not have been initialized. So any help would be appreciated on how to handle final attributes initialization in case of multiple constructors. It works fine if I have only the second constructor. Answer Y…
JMM guarantees about final as field and non final reference to the object
I try to understand final fields semantic. Lets research code: public class App { final int[] data; static App instance; public App() { this.data = new int[]{1, 0}; …
How does the “final” keyword in Java work? (I can still modify an object.)
In Java we use final keyword with variables to specify its values are not to be changed. But I see that you can change the value in the constructor / methods of the class. Again, if the variable is static then it is a compilation error. Here is the code: Above code works fine and no errors. Now change the
Declaring a List field with the final keyword
If I have the following statement within a class where Synapse is an abstract type: Does final allow me to still be able to change the state of the Synapse objects in the List, but prevent me from adding new Synapse objects to the list? If I am wrong, could you please explain what final is doing and when I
Change private static final field using Java reflection
I have a class with a private static final field that, unfortunately, I need to change it at run-time. Using reflection I get this error: java.lang.IllegalAccessException: Can not set static final boolean field Is there any way to change the value? Answer Assuming no SecurityManager is preventing you from doi…
How to handle a static final field initializer that throws checked exception
I am facing a use case where I would like to declare a static finalfield with an initializer statement that is declared to throw a checked exception. Typically, it’d look like this: The issue I have here is that the ObjectName constructor may throw various checked exceptions, which I don’t care ab…