TreeMap clone() Method in Java with Examples
Last Updated :
13 Jan, 2022
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In Java, clone() method of the TreeMap class is used to return a shallow copy of the mentioned treemap. It just creates a copy of the map.
--> java.util Package
--> TreeMap Class
--> clone() Method
Syntax:
Tree_Map.clone()
Parameters: The method does not take any parameters.
Return Type: A copy of the TreeMap.
Example 1: Mapping string values to integer keys
// Java Program to Illustrate clone() method
// of TreeMap class
// Importing required classes
import java.util.*;
// Main class
public class GFG {
// Main driver method
public static void main(String[] args)
{
// Creating an empty TreeMap by
// declaring object of integer-string pairs
TreeMap<Integer, String> tree_map
= new TreeMap<Integer, String>();
// Mapping string values to int keys
// using put() method
tree_map.put(10, "Geeks");
tree_map.put(15, "4");
tree_map.put(20, "Geeks");
tree_map.put(25, "Welcomes");
tree_map.put(30, "You");
// printing all elements of TreeMap
System.out.println("Initial Mappings are: "
+ tree_map);
// Displaying the cloned TreeMap
// using clone()
System.out.println("The cloned map look like this: "
+ tree_map.clone());
}
}
Output
Initial Mappings are: {10=Geeks, 15=4, 20=Geeks, 25=Welcomes, 30=You}
The cloned map look like this: {10=Geeks, 15=4, 20=Geeks, 25=Welcomes, 30=You}Example 2: Mapping Integer Values to String Keys
// Java Program to Illustrate clone() Method
// of TreeMap class
// Importing required classes
import java.util.*;
// Main class
public class GFG {
// Main driver method
public static void main(String[] args)
{
// Creating an empty TreeMap
TreeMap<String, Integer> tree_map
= new TreeMap<String, Integer>();
// Mapping int values to string keys
// using put() method
tree_map.put("Geeks", 10);
tree_map.put("4", 15);
tree_map.put("Geeks", 20);
tree_map.put("Welcomes", 25);
tree_map.put("You", 30);
// Displaying all elements initial mapping TreeMap
System.out.println("Initial Mappings are: "
+ tree_map);
// Displaying the cloned TreeMap
// using clone()
System.out.println("The cloned map look like this: "
+ tree_map.clone());
}
}
Output
Initial Mappings are: {4=15, Geeks=20, Welcomes=25, You=30}
The cloned map look like this: {4=15, Geeks=20, Welcomes=25, You=30}Note: Similarly the same operation can be performed with any type of Mappings with variation and combination of different data types.
