How to Use @JvmName for Getters in Java Interop for Interfaces and Abstract Classes?

How can the @JvmName annotation be applied to getters of properties defined in interfaces or abstract classes in Kotlin when interoperating with Java?

// Kotlin code with @JvmName usage
interface MyInterface {
    @get:JvmName("customGetName")
    val name: String
}

The @JvmName annotation in Kotlin allows developers to define custom names for Java methods, enhancing interoperability between Kotlin and Java. This can be particularly useful in interfaces and abstract classes to avoid naming conflicts or to better conform to Java naming conventions.

// Example of using @JvmName in an interface
interface Person {
    @get:JvmName("getUserName")
    val name: String
}

// Java usage: 
// Person person = ...;
// String userName = person.getUserName();

Causes

• Kotlin properties are compiled to Java methods with specific naming conventions (e.g., `getName` for `val name`).
• When the generated method names clash with existing Java methods or when specific naming is required for Java users.

Solutions

• Use the @JvmName annotation on the getter of the property in the interface or abstract class to specify a different name.
• This allows Java code to call the Kotlin property getter using the provided custom name instead of the default one.

Mistake: Forgetting the @get: prefix when using @JvmName on property getters.

Solution: Always include the @get: prefix before the @JvmName annotation.

Mistake: Not accounting for visibility modifiers on properties.

Solution: Ensure that the property is public; otherwise, Java may not be able to access it.

Mistake: Using @JvmName on fields rather than on getters.

Solution: Always apply the @JvmName annotation to the getter function, not directly to the fields.