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Friday, February 14, 2014

How to use iterator in Map : java

Here is an example of how to use Iterator in Map. To use iterator in Map you need to Get a set of all the entries contained in the HashMap then Obtain an Iterator for the entries Set.

package java;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Set;
public class HashMapIterator {

public static void main(String[] args) {

// Create a HashMap and populate it with elements

HashMap hashMap = new HashMap();




// Get a set of all the entries (key - value pairs) contained in the HashMap

Set entrySet = hashMap.entrySet();

// Obtain an Iterator for the entries Set

Iterator it = entrySet.iterator();

// Iterate through HashMap entries

System.out.println("HashMap entries : ");





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