java.util.TreeMap.clone() Method

Description

The clone() method is used to return a shallow copy of this TreeMap instance.But the keys and values themselves are not cloned.

Declaration

Following is the declaration for java.util.TreeMap.clone() method.

public Object clone()

Parameters

• NA

Return Value

The method call returns a shallow copy of this map.

Exception

• NA

Example

The following example shows the usage of java.util.TreeMap.clone() method.

package com.tutorialspoint;

import java.util.*;

public class TreeMapDemo {
   public static void main(String[] args) {
      // creating tree map 
      TreeMap<Integer, String> treemap = new TreeMap<Integer, String>();
      TreeMap<Integer, String> treemapclone = new TreeMap<Integer, String>();
      
      // populating tree map
      treemap.put(2, "two");
      treemap.put(1, "one");
      treemap.put(3, "three");
      treemap.put(6, "six");
      treemap.put(5, "five");
      
      // cloning tree map
      System.out.println("Cloning tree map");
      treemapclone=(TreeMap)treemap.clone();
      
      System.out.println("Original map: "+ treemap);
      System.out.println("Cloned map: "+ treemapclone);
   }    
}

Let us compile and run the above program, this will produce the following result.

Cloning tree map
Original map: {1=one, 2=two, 3=three, 5=five, 6=six}
Cloned map: {1=one, 2=two, 3=three, 5=five, 6=six}