Write a Java program to get a shallow copy of a HashMap instance

This is a Java program that demonstrates how to create a shallow copy of a HashMap using the clone() method. Here's how it works:

First, a HashMap object is created using the HashMap class. This HashMap will be used to store integer keys and string values.
Key-value pairs are added to the HashMap using the put() method.
The contents of the HashMap are printed to the console using the println() method.
A new HashMap object is created using the HashMap class. This will be used to store the shallow copy of the original HashMap.
The clone() method is called on the original HashMap object, and the result is stored in the new HashMap object. This creates a shallow copy of the original HashMap.
The contents of the new HashMap are printed to the console using the println() method.

Source Code

import java.util.*;  
public class Shallow_Copy
{  
	public static void main(String args[])
	{  
		HashMap<Integer,String> hash_map = new HashMap<Integer,String>();  
		hash_map.put(1, "Pink");
		hash_map.put(2, "Green");
		hash_map.put(3, "Red");
		hash_map.put(4, "White");
		hash_map.put(5, "Blue");
		hash_map.put(6, "Black");
		hash_map.put(7, "Orange");		
		System.out.println("HashMap : " + hash_map);
 
		HashMap<Integer,String> new_hashmap = new HashMap<Integer,String>();	
		new_hashmap = (HashMap)hash_map.clone();     
		System.out.println("Cloned HashMap : " + new_hashmap);        
	}
}

Output

HashMap : {1=Pink, 2=Green, 3=Red, 4=White, 5=Blue, 6=Black, 7=Orange}
Cloned HashMap : {1=Pink, 2=Green, 3=Red, 4=White, 5=Blue, 6=Black, 7=Orange}

Write a Java program to get a shallow copy of a HashMap instance

Source Code

Output

Example Programs

HashMap Programs in Java