Example of toArray() method of hashset in java.

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Example of toArray() method of hashset in java.
Posted on: April 4, 2011 at 12:00 AM

Example of toArray() method of hashset in java.

Example of toArray() method of hashset in java.

The toArray() is a method of HashSet in java. It is used to create array of object. It is also used to copy all element of hashset into array of object.

Code:

HashSetToArray .java

package net.roseindia;

import java.util.HashSet;

public class HashSetToArray {

public static void main(String[] arg) {

HashSet obHashSet = new HashSet();

obHashSet.add(new Integer(1));

obHashSet.add(new Integer(2));

obHashSet.add(new Integer(3));

obHashSet.add(new Integer(4));

System.out.println("All Elements in HashSet : " + obHashSet);

/* Copy to array of object... */

Object[] num = obHashSet.toArray();

/* All elements of array... */

for (int i = 0; i < num.length; i++) {

System.out.println("Array element : " + num[i]); } }

}

Output :

All Elements in HashSet : [1, 2, 3, 4]

Array element : 1

Array element : 2

Array element : 3

Array element : 4

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