Question

How to convert set of string to array of string in Java

Answer 1

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

public class MyClass {
    public static void main(String args[]) {
       Set<String> set = new HashSet<>(Arrays.asList("Java", "C", "PHP", "Python"));

		String[] array = new String[set.size()];

		int i = 0;
		for (String s: set)
			array[i++] = s;

		System.out.println(Arrays.toString(array));
    }
}

/*
run:

[Java, C, PHP, Python]

*/

 

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Answer 2

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

public class MyClass {
    public static void main(String args[]) {
        Set<String> set = new HashSet<>(Arrays.asList("Java", "C", "PHP", "Python"));

	    String[] array = set.toArray(new String[0]);
	
	    System.out.println(Arrays.toString(array));
    }
}


/*
run:

[Java, C, PHP, Python]

*/

 

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Answer 3

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

public class MyClass {
    public static void main(String args[]) {
        Set<String> set = new HashSet<>(Arrays.asList("Java", "C", "PHP", "Python"));

	    String[] array = set.stream().toArray(String[]::new);
	
	    System.out.println(Arrays.toString(array));
    }
}


/*
run:

[Java, C, PHP, Python]

*/

 

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