❮ HashMap Methods
Example
import java.util.HashMap;
public class Main {
public static void main(String[] args) {
HashMap<String, String> capitalCities = new HashMap<String, String>();
capitalCities.put("England", "London");
capitalCities.put("Germany", "Berlin");
capitalCities.put("Norway", "Oslo");
capitalCities.put("USA", "Washington DC");
HashMap copy = (HashMap)capitalCities.clone();
copy.remove("England");
System.out.println(capitalCities);
System.out.println(copy);
}
}Definition and Usage
The clone() method returns a copy of the map as an Object .
This creates a "shallow" copy, which means that copies of objects in the map are not created, instead the map has references to the same objects that are in the original map.
Note
Since the return type is Object , it must be type casted in order to use it as a HashMap as shown in the example above.
Syntax
public Object clone()Technical Details
| Returns: | A copy of the HashMap object. |
|---|