TreeMap clone() method in java

by September 11, 2020 Java

Let’s learn TreeMap clone() method in java.

TreeMap clone() method in java

clone() method of TreeMap class returns a shallow copy of this TreeMap instance. (The keys and values themselves are not cloned.)

Syntax:

public Object clone()

Also read – TreeMap in java

Now let’s see example on TreeMap clone() method.

import java.util.TreeMap;
public class TreeMapCloneMethodExample
{
   public static void main(String[] args)
   {
      TreeMap<Integer, String> tm = new TreeMap<Integer, String>();
      TreeMap<Integer, String> tmClone = new TreeMap<Integer, String>();
      tm.put(60, "apple");
      tm.put(10, "banana");
      tm.put(50, "cherry");
      tm.put(30, "fig");
      tm.put(80, "grape");
      tm.put(90, "kiwifruit");
      // cloning TreeMap
      System.out.println("Cloning TreeMap: ");
      tmClone = (TreeMap)tm.clone();
      System.out.println("Given TreeMap: " + tm);
      System.out.println("Cloned TreeMap: " + tmClone);
   }
}

Output:

Cloning TreeMap:
Given TreeMap: {10=banana, 30=fig, 50=cherry, 60=apple, 80=grape, 90=kiwifruit}
Cloned TreeMap: {10=banana, 30=fig, 50=cherry, 60=apple, 80=grape, 90=kiwifruit}