Convert Kotlin MutableMap to java.util.HashMap

Question

I am working with a pretty old project that has a lot of java code in it, and to replace it, it will be too much of a hassle, and as kotlin is much better than java, I'm trying to coed all the new code in kotlin, but when I try to access a java code with this kotlin code

val params = mutableMapOf<String, String>(
    "name" to response.name,
    "type" to response.type
)
product.params = params

I got a red underline below the params, it said

Required: Hashmap<String!, Any!>!
Found: MutableMap<String, String>

This is my java setter

public void setParams(HashMap<String, Object> params){
    this.params = params;
}

Can I fix this without changing the java code? Please help if it is possible, or if it is not, and what is the workaround to fix this.

Answer 1

You can construct a new HashMap from the params:

val params = mutableMapOf<String, String>(
    "name" to response.name,
    "type" to response.type
)
product.params = HashMap(params)

Answer 2

You can use hashMapOf instead.

product.params = hashMapOf<String, Any?>(
    "name" to response.name,
    "type" to response.type
)