final Questions
0
I have a hierarchy of polymorphic classes. At some level in the hierarchy, I want to make the implementation of a virtual method final.
Additionally, I just want to use the base class implementatio...
Buckra asked 30/9 at 8:17
6
In Kotlin, we have val that is final and can't be change. e.g.
val something = "Something"
If a value that is is initialized later, we use lateinit var.
lateinit var something: String
But thi...
16
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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...
Liberec asked 21/7, 2010 at 16:35
12
Solved
What is the purpose of the final keyword in C++11 for functions? I understand it prevents function overriding by derived classes, but if this is the case, then isn't it enough to declare as non-vir...
5
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By making private constructor, we can avoid instantiating class from anywhere outside. and by making class final, no other class can extend it. Why is it necessary for Util class to have private co...
Shenika asked 3/9, 2015 at 12:4
9
Solved
I was trying to identify the reason behind constants in Java
I have learned that Java allows us to declare constants by using final keyword.
My question is why didn't Java introduce a Constant (co...
1
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What is the difference in between declaring a new (non override) member function virtual final versus just non-virtual?
I'm guessing a virtual final member function (that does not override anything...
Dedicated asked 20/9, 2023 at 13:51
14
Solved
I have seen much code where people write public static final String mystring = ...
and then just use a value.
Why do they have to do that? Why do they have to initialize the value as final prior t...
15
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I'm playing with lambdas in Java 8 and I came across warning local variables referenced from a lambda expression must be final or effectively final. I know that when I use variables inside anonymou...
Nikos asked 5/1, 2014 at 19:30
17
Solved
What is the difference between the const and final keywords in Dart?
2
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This program is the final assignment for my class and I'm have issues figuring out why I'm receiving the error "local variables referenced from an inner class must be final or effectively final". T...
Zero asked 22/9, 2015 at 2:47
25
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I am reading a book about Java and it says that you can declare the whole class as final. I cannot think of anything where I'd use this.
I am just new to programming and I am wondering if program...
4
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I have this piece of code that loads Properties from a file:
class Config {
val properties: Properties = {
val p = new Properties()
p.load(Thread.currentThread().getContextClassLoader.getResou...
Spoilsman asked 28/1, 2013 at 17:50
11
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Wikipedia has the following example on the C++11 final modifier:
struct Base2 {
virtual void f() final;
};
struct Derived2 : Base2 {
void f(); // ill-formed because the virtual function Base2::...
Headrail asked 28/7, 2012 at 20:27
3
Consider:
class UnderstandingConversion {
public static void main(String[] args) {
int a=10, b=20;
byte c = (a>b) ? 40 : 50;
System.out.println(c);
// output : lossy conversion error
}
...
2
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I like compiling my code using -Wsuggest-final-types and -Wsuggest-final-methods in order to be warned about opportunities where the final keyword could be used to allow the compiler to optimize mo...
4
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Say I have a class:
public class R {
public static final int _1st = 0x334455;
}
How can I get the value of the "_1st" via reflection?
Bad asked 21/4, 2010 at 17:57
3
In an std::vector<T> the vector owns the allocated storage and it constructs Ts and destructs Ts. Regardless of T's class hierarchy, std::vector<T> knows that it has only created a T an...
Gurl asked 6/8, 2022 at 6:48
14
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In Java we see lots of places where the final keyword can be used but its use is uncommon.
For example:
String str = "abc";
System.out.println(str);
In the above case, str can be final but thi...
Houlberg asked 25/11, 2010 at 17:8
1
The memory model is defined in 17.4. Memory Model.
The final field multi-threading guarantees are given in 17.5. final Field Semantics.
I don't understand why these are separate sections.
AFAIK bot...
Kaiserism asked 31/7, 2022 at 23:9
3
Solved
Dart docs read:
If you never intend to change a variable, use final or const, either
instead of var or in addition to a type. A final variable can be set
only once;
Ok, this means that assig...
7
Solved
Strategy for defining immutable class says that
all the fields should be final.
For ex:
private String name;
Why does it have to be final?
Since I am not giving setter methods for it? It can'...
Granulate asked 4/9, 2013 at 7:32
7
Solved
If I have the following statement within a class where Synapse is an abstract type:
private final List<Synapse> synapses;
Does final allow me to still be able to change the state of the Sy...
20
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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...
2
When I specify an enum like this:
enum Color { RED }
The generated code javap -p Color looks like this:
final class Color extends java.lang.Enum<Color> {
public static final Color RED;
pri...
Namedropper asked 20/4, 2022 at 14:51
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