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}

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