Custom subscript in Java [duplicate]

Question

In Apple's programming language Swift, you can use subscript as you do in arrays for your own class. For example a class in Swift could look like this:

class MyNumber {
    let value: Int
    init(value: Int) {
        self.value = value
    }
    subscript(i: Int) -> Int {
        return value * i
    }
}

This class only has a getter subscript but you could do a setter subscript, too. Anyway when doing this:

let number = MyNumber(value: 15)
println(number[3])

it produces the output 45.

Is it possible to write such classes using subscript in Java as well? Of course, I could simply use a method with a parameter but I wanted to know if this is possible. Thanks for any answer :)

Nope, not possible. There is no operator overloading in Java. — August
– August, Commented Jan 1, 2015 at 17:11

lukas · Accepted Answer · 2018-04-15 14:38:48Z

1

Short answer: no. Setting something equal to Class() in Java is creating a new instantiation of that object. Just do something like this:

var = new MyNumber(15)
var.multiply(3)

and in your MyNumber class code, change subscript to multiply for clarity. That will work the same.

A shorthand version of the same principle is

System.out.println(new MyNumber(15).multiply(3));

edited Apr 15, 2018 at 14:38

lukas

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answered Jan 1, 2015 at 17:16

Isaiah Taylor

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