Question

How to get HashSet size in Java

Answer 1

import java.util.*;

public class MyClass {
    public static void main(String args[]) {
        Set<String> letters = new HashSet<>(Arrays.asList("a", "b", "c", "d", "a", "a", "e"));
      
        System.out.println(letters); 
        System.out.println(letters.size()); 
    }
}




/*
run:

[a, b, c, d, e]
5

*/

 

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