What is the different between Set and List

Set and List explanation

• Set – Stored elements in unordered or shuffles way, and does not allow duplicate values.
• List – Stored elements in ordered way, and allow duplicate values.

Set and List Example

import java.util.ArrayList;

import java.util.HashSet;

import java.util.List;

import java.util.Set;

public class SetAndListExample

{

    public static void main( String[] args )

    {

        System.out.println("List example .....");

        List<String> list = new ArrayList<String>();

        list.add("1");

        list.add("2");

        list.add("3");

        list.add("4");

        list.add("1");

        for (String temp : list){

               System.out.println(temp);

        }

        System.out.println("Set example .....");

        Set<String> set = new HashSet<String>();

        set.add("1");

        set.add("2");

        set.add("3");

        set.add("4");

        set.add("1");

        set.add("2");

        set.add("5");

        for (String temp : set){

               System.out.println(temp);

        }       

    }

}

Output

List example .....

1

2

3

4

1

Set example .....

3

2

10

5

4

In Set, the stored values are in unordered way, and the duplicated value will just ignored.