How to synchronize Set

Set is non-synchronized in Java. So to perform thread-safe operations,you must synchronize Set.

There are two ways.

   1. Synchronizing the set explicitly. 
   2. Use 'Collections.synchronizedSet' method.

import java.util.*;

public class SetEx {
    public static void main(String args[]){
        Set<Integer> mySet = Collections.synchronizedSet(new HashSet<> ());
        
        mySet.add(10);
        mySet.add(20);
        mySet.add(30);
        
        System.out.println(mySet);
    }
}

Output

[20, 10, 30]

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