Question

How to get set size in Java

Answer 1

import java.util.Set;
import java.util.Arrays;
import java.util.HashSet;

class Program {
    public static void main(String[] args) {
        String str = "aaaaaabbbcccccccccccc";
        
        Set<String> set = new HashSet<String>(Arrays.asList(str.split("")));
        
        System.out.println(set.size());
    }
}
 
 
 
/*
run:
 
3
 
*/

 

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