Question

How to copy all elements of HashSet to an Object Array in Java

Answer 1

package javaapplication1;

import java.util.HashSet;

public class JavaApplication1 {

    public static void main(String[] args) {

        HashSet hash = new HashSet();
   
        hash.add(new Integer("1"));
        hash.add(new Integer("2"));
        hash.add(new Integer("3"));
        hash.add(new Integer("4"));
        hash.add(new Integer("5"));

        Object[] oArray = hash.toArray();
   
        for (int i = 0; i < oArray.length; i++)
             System.out.println(oArray[i]);
  }
}
  
/*
run:

1
2
3
4
5

*/

 

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Answer 2

package javaapplication1;

import java.util.HashSet;

public class JavaApplication1 {

    public static void main(String[] args) {

        HashSet hash = new HashSet();
   
        hash.add(new Integer("1"));
        hash.add(new Integer("2"));
        hash.add(new Integer("3"));
        hash.add(new Integer("4"));
        hash.add(new Integer("5"));

        Object[] oArray = hash.toArray();
   
        for (Object oa : oArray) 
            System.out.println(oa);
  }
}
  
/*
run:

1
2
3
4
5

*/

 

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