In Julia programming language, calling a method in a class is similar to calling any other function. Here is an example:
Let's consider a simple class called Rectangle which has properties length and width and a method area that calculates the area of the rectangle.
# Define the Rectangle class.
struct Rectangle
length::Float64
width::Float64
end
# Define the area method for Rectangle class.
function area(rect::Rectangle)
return rect.length * rect.width
end
To call the area method for a specific Rectangle instance, we can create an instance of the class and pass it to the method like this:
# Create a new Rectangle instance.
rect = Rectangle(3.0, 4.0)
# Call the area method for the rectangle instance.
result = area(rect)
# Print the result.
println("The area of the rectangle is $result.")
This will output:
The area of the rectangle is 12.0.
In this example, we have created an instance of the Rectangle class, passed it to the area method, and stored the result in the result variable. Finally, we printed the result to the console.