Secret Santa Draw Names this season without Paper!!!

                One of the more popular holiday games, Secret Santa (also known as Kris Kringle in some circles) is a fun and easy way for a group of friends, family members or co-workers to exchange gifts.

                The basic concept of the Secret Santa game is simple. All of the participants’ names are placed into a hat, box, etc. and mixed up. Each person then chooses one name from the box, but doesn't tell anyone which name was picked. He/she is now responsible for buying a gift for the person selected.

For more information how to play? Click me!! and  to play  online Click me!!

Today we will explore concepts of Collections in Java to create Virtual name drawing Program.

	import java.util.ArrayList;
	import java.util.Collections;
	import java.util.List;
	import java.util.Map;
	import java.util.Scanner;
	import java.util.TreeMap;
	public class LogicalClass {
	//results are saved in map
	static Map<Integer,Integer> mappings=new TreeMap<Integer,Integer>();
	static List<Integer> listNumbers1=new ArrayList<Integer>();
	static List<Integer> listNumbers2=new ArrayList<Integer>();
	public static void match(){
	//taking input from users.
	System.out.println("enter the number of players");
	Scanner sc=new Scanner(System.in);
	int players=sc.nextInt();
	for(int i=0;i<players;i++){
	listNumbers.add(i+1);
	listNumbe.add(i+1);
	}
	// shuffle mehtod using to randomize the elements in list.
	Collections.shuffle(listNumbers);
	Collections.shuffle(listNumbe);
	for(int i=0;i<players;i++){
	mappings.put(listNumbers.get(i),listNumbe.get((players-1)-i));
	}
	for(Map.Entry<Integer,Integer> entry : mappings.entrySet()) {
	System.out.println(entry.getKey()+"should be secret santa for "+entry.getValue());
	}
	sc.close();
	}
	}

view raw secret santa logical class.txt hosted with ❤ by GitHub

	public class ClientCkass {
	public static void main(String[] args) {
	// calling static match method of class Logical class from Client class(main) class
	LogicalClass.match();
	}
	}

view raw secret santa client class.txt hosted with ❤ by GitHub

How to use this code to draw the names??! Well it is simple all you need to do is

• take a Notepad/Notepad++, write down the names of the players.
•  copy pass the code in two classes and run the program. 
• compare the results with the names written in the notepad(by default Notepad++  has number displayed for each line which makes your job easy to compare results).

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About Sandeep Ram