What is HashMap clone() in Java?

We can use the java.util.HashMap.clone() method to create a shallow copy of any specified HashMap, meaning that no new HashMap is created. Instead, a reference for the original HashMap is made. This shallow copy refers to the clone of a HashMap.

Syntax

Hash_Map.clone()

Parameters and Return Value

Parameters

This method does not have any parameters.

Return value

This method returns a copy of a HashMap.

// import the util lib from Java
import java.util.*;
class HelloWorld {
    public static void main( String args[] ) {
    {
		// Creating an empty HashMap based on our data
		HashMap<Integer, String> fruit_prices = new HashMap<Integer, String>();
		// Introduce some data in the hashmap
		fruit_prices.put(10, "Apple");
		fruit_prices.put(20, "Banana");
		fruit_prices.put(30, "Orange");
		// Lets have a look at the HashMap
		System.out.println("Hashmap: "+ fruit_prices);
	
		// Lets have a look a look at the hashmap after applying clone
		System.out.println("After applying clone method: " + fruit_prices.clone());
	}
  }
}

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What is HashMap clone() in Java?

Syntax

Parameters and Return Value

Parameters

Return value

Code