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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.
860
Kotlin MutableMap is an interface of collection framework that holds the object in the form of key and value pair. The values of MutableMap interface are retrieved by using their corresponding keys. The key and value may be of different pairs such as <Int, Int>,<Int, String>, <Char, String> etc. Each key of MutableMap holds only one value.
Use toList () method on map object or keys, values properties. 5. Kotlin Map to List using entries properties map.entries properties will returns the key-value pairs. Use map () method on the entries object. We can use the any pattern in between the key and value.
Converting LinkedHashMap to List in Kotlin Using ArrayList Constructor From the above program, the output is not in the order what is inserted into the map. To preserve the insertion order then need to use LinkedHashMap class instead of HashMap.
The map is invariant in its key type. V - the type of map values. The mutable map is invariant in its value type. Represents a key/value pair held by a MutableMap. Returns a MutableSet of all key/value pairs in this map. Returns a MutableSet of all keys in this map. Returns a MutableCollection of all values in this map.
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)
You can use hashMapOf instead.
product.params = hashMapOf<String, Any?>(
"name" to response.name,
"type" to response.type
)
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