Question

How to initialize a set with numbers in Java

Answer 1

import java.util.Collections;
import java.util.HashSet;
import java.util.Set;

public class MyClass {
    public static void main(String args[]) {
        Set<Integer> set = new HashSet<>();
        
        Collections.addAll(set, 1, 7, 0, 9, 3, 5, 8, 6, 99, 1200);
        
        System.out.println(set);
    }
}




/*
run:

[0, 1200, 1, 3, 99, 5, 6, 7, 8, 9]

*/

 

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Answer 2

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

public class MyClass {
    public static void main(String args[]) {
        Set<Integer> set = new HashSet<>(Arrays.asList(1, 7, 0, 9, 3, 5, 8, 6, 99, 1200));

        System.out.println(set);
    }
}




/*
run:

[0, 1200, 1, 3, 99, 5, 6, 7, 8, 9]

*/

 

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