java.util.TreeMap.clone() Method


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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}

java_util_treemap.htm

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