Question

How to print a HashSet in Java

Answer 1

import java.util.HashSet;
import java.util.Iterator;
 
public class PrintHashSet {
    public static void main(String args[]) {
        HashSet<String> hset = new HashSet<>();
          
        hset.add("java");
        hset.add("c");
        hset.add("c++");
        hset.add("c#");
        hset.add("python");
        hset.add("rust");

        Iterator<String> s = hset.iterator();  
        while(s.hasNext()) {  
           System.out.println(s.next());  
        }
    }
}



/*
run:

c#
rust
c++
python
java
c

*/

 

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Answer 2

import java.util.HashSet;

public class PrintHashSet {
    public static void main(String args[]) {
        HashSet<String> hset = new HashSet<>();
          
        hset.add("java");
        hset.add("c");
        hset.add("c++");
        hset.add("c#");
        hset.add("python");
        hset.add("rust");

        System.out.println(hset); 
    }
}



/*
run:

[c#, rust, c++, python, java, c]

*/

 

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Answer 3

import java.util.HashSet;

public class PrintHashSet {
    public static void main(String args[]) {
        HashSet<String> hset = new HashSet<>();
          
        hset.add("java");
        hset.add("c");
        hset.add("c++");
        hset.add("c#");
        hset.add("python");
        hset.add("rust");

        for (String element : hset) {
            System.out.println(element);
        }
    }
}



/*
run:

c#
rust
c++
python
java
c

*/

 

70+ SQL courses for beginners and professionals