Создайте HashMap с другой карты Java
import java.util.HashMap;
import java.util.TreeMap;
class Main {
public static void main(String[] args) {
// create a treemap
TreeMap<String, Integer> evenNumbers = new TreeMap<>();
evenNumbers.put("Two", 2);
evenNumbers.put("Four", 4);
System.out.println("TreeMap: " + evenNumbers);
// create hashmap from the treemap
HashMap<String, Integer> numbers = new HashMap<>(evenNumbers);
numbers.put("Three", 3);
System.out.println("HashMap: " + numbers);
}
}
Eager Elk