Example of Hashset iterator method in java.


 

Example of Hashset iterator method in java.

Example of Hashset iterator method in java.

Example of Hashset iterator method in java.

Example of Hashset iterator method in java.

In this exmple of HashSet class,  you will see the use of iterator() method. It is used for traversing all element from HashSet.

Code: 

HashSetRemoveElement.java

package net.roseindia;

import java.util.HashSet;

public class RemoveAllElement {

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("Element before clear method : " + obHashSet);

obHashSet.clear();

System.out.println("Check HashSet : " + obHashSet.isEmpty());

System.out.println("Element after clear method : " + obHashSet);

}

}

Output :

Element before clear method : [1, 2, 3, 4]

Check HashSet : true

Element after clear method : []

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