TreeMap clone() Method in Java

The java.util.TreeMap.clone() method is used to return a shallow copy of the mentioned treemap. It just creates a copy of the map.

Syntax:

Tree_Map.clone()

Parameters: The method does not take any parameters.

Return Value: The method just returns a copy of the TreeMap.

Below programs are used to illustrate the working of java.util.TreeMap.clone() Method:
Program 1: Mapping String Values to Integer Keys.

// Java code to illustrate the clone() method 
import java.util.*; 
  
public class Tree_Map_Demo { 
    public static void main(String[] args) 
    { 
  
        // Creating an empty TreeMap 
        TreeMap<Integer, String> tree_map = new TreeMap<Integer, String>(); 
  
        // Mapping string values to int keys 
        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"); 
  
        // Displaying the TreeMap 
        System.out.println("Initial Mappings are: " + tree_map); 
  
        // Displaying the cloned TreeMapusing clone() 
        System.out.println("The cloned map look like this: " +  
        tree_map.clone()); 
    } 
} 

Program 2: Mapping Integer Values to String Keys.

// Java code to illustrate the clone() method 
import java.util.*; 
  
public class Tree_Map_Demo { 
    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 
        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 the TreeMap 
        System.out.println("Initial Mappings are: " + tree_map); 
  
        // Displaying the cloned TreeMapusing clone() 
        System.out.println("The cloned map look like this: " + 
        tree_map.clone()); 
    } 
} 

Note: The same operation can be performed with any type of Mappings with variation and combination of different data types.

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