Hi problem with Barcode4J val barcodeGenerator = Code128Bean() barcodeGenerator.fontSize(0.5) got k...

# getting-started

[Nicola]

Hi
problem with Barcode4J
val barcodeGenerator = Code128Bean()
barcodeGenerator.fontSize(0.5)

got
kotlin Unresolved reference. None of the following candidates is applicable because of receiver type mismatch:

kotlin version 1.8.10

[Nicola]

..followed by this (intimidating indeed):
public operator fun <T, R> DeepRecursiveFunction<TypeVariable(T), TypeVariable(R)>.invoke(value: TypeVariable(T)): TypeVariable(R) defined in kotlin

[Nicola]

Barcode4j is a java library, version 2.1
fontSize is a property with usual get/set

[Adam S]

are you sure there’s a fontSize() function? What happens if you try setFontSize(0.5) instead?

[Nicola]

/**
 * Returns the font size of the human-readable part.
 * @return the font size
 */
public double getFontSize() {
    return this.fontSize;
}

/**
 * Sets the font size of the human-readable part.
 * @param size the font size
 */
public void setFontSize(double size) {
    this.fontSize = size;
}

[Nicola]

with setFontSize it works!

[Nicola]

i didn't tried because Intellij marked in red but after a while it cleared it up ...

[Nicola]

anyway ...

[Nicola]

thanks a lot 👍

[Adam S]

no problem!

if there’s a getFontSize() and setFontSize() in Java (given some conditions…) then Kotlin will magically create a fontSize variable property, so this should also work:

val barcodeGenerator = Code128Bean()
barcodeGenerator.fontSize = 0.5

https://kotlinlang.org/docs/java-interop.html#getters-and-setters

[Nicola]

ah my fault!

[Nicola]

i was using fontSize(argument)

[Nicola]

yes it works in the assignment form .. thanks again 😅