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Reference to Classes in Java


Reference to Classes in Java

By : user2956876
Date : November 22 2020, 03:03 PM
To fix the issue you can do The closest you could come would be to pass ClassA.class or ClassB.class as a Class and then use reflection to get the field for that class, and its value.
code :
// TODO: Much better exception handling :) (It's almost never appropriate to
// throw Exception...)
public static String getS(Class<?> clazz) throws Exception {
    Field field = clazz.getField("s");
    return (String) field.get(null);
}
String a = getS(ClassA.class);
String b = getS(ClassB.class);


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Instantiation of reference classes within reference classes - problems with lock() and immutability

Instantiation of reference classes within reference classes - problems with lock() and immutability


By : dudedude975
Date : March 29 2020, 07:55 AM
With these it helps Drawing on the above, the solution I am using is (a little long because of the type checking):
code :
A <- setRefClass('A',
    fields = list(
        count = function(x) {
            if (!missing(x)) {
                if(class(x) != 'numeric')
                    stop('Class A: count set by non-number')
                .self$count.private <- x
            }
            .self$count.private
        }
    ),

    methods = list(
        initialize = function (c=0) {
            cat('DEBUG: A$initialize(c); where c=');  cat(c); cat('\n')
            count <<- c
        }
    )
)

instance.of.A <- A$new(10)
str(instance.of.A)

B <- setRefClass('B',
    field = list(
        a = function(x) {
            if (!missing(x)) {
                if(!inherits(x, 'envRefClass') || class(x)[1] != 'A')
                    stop('Class B: expecting instance of class A')
                .self$a.private <- x
            }
            .self$a.private
        },
        b = function(x) {
            if (!missing(x)) {
                if(!inherits(x, 'envRefClass') || class(x)[1] != 'A')
                    stop('Class B: expecting instance of class A')
                .self$b.private <- x
            }
            .self$b.private
        }
    ),

    methods = list(
        initialize = function(c) {
            a <<- instance.of.A
            b <<- getRefClass('A')$new(c)
        }
    )
)

instance.of.b <- B$new(100)
str(instance.of.b)
Scala cannot reference Java classes

Scala cannot reference Java classes


By : Michalis
Date : March 29 2020, 07:55 AM
like below fixes the issue It appears the particular class(es) are package private. Please make them public and then report back.
Reference to Classes in Java

Reference to Classes in Java


By : Ben Moore
Date : March 29 2020, 07:55 AM
I hope this helps you . I was doing inorder traversals when in the solution I came across the following lines:
code :
stack.push(current);
current = current.left;
How do you reference another one of your classes in java?

How do you reference another one of your classes in java?


By : MorbidCreep
Date : March 29 2020, 07:55 AM
Any of those help getFloat1() and setFloat1() are instance methods.If you want access any instance method then you should create an instance from the class.
Java classes reference each other

Java classes reference each other


By : Theft916
Date : March 29 2020, 07:55 AM
This might help you As is said above, this is a sign of code smell.
Having a setter to set the method afterwards is not satisfactory, as you have an object in an indeterminate state, until the setters are called.
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