List vs SET

Introduction#

What are differences between List and Set collection at the top level and How to choose when to use List in java and when to use Set in Java

List vs Set

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 list = new ArrayList(); 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