Iterate over each Entry in HashMap in Java Or loop Map to remove Entries

Example Class: HashMapIterator.java

package com.pkm.annotation;

import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;

/**
 *
 * @author Pritom
 */
public class HashMapIterator {
    public static void main(String[] args) {
        Map map = new HashMap();
        map.put("key1", "Value 1");
        map.put("key2", "Value 2");
        map.put("key3", "Value 3");
        map.put("key4", "Value 4");
        map.put("key5", "Value 5");
        
        /* Using Iterator */
        System.out.println("Using Iterator");
        Iterator iterator = map.entrySet().iterator();
        while(iterator.hasNext()) {
            Map.Entry mapEntry = (Map.Entry) iterator.next();
            System.out.println("Key: " + mapEntry.getKey() + ", Value: " + 
                    mapEntry.getValue());
            if(mapEntry.getKey().toString().equals("key3")) {
                /* Removing without ConcurrentModificationException */
                iterator.remove(); 
            }
        }
        
        /* Using Direct Entry Set */
        System.out.println("\nUsing Direct Entry Set");
        for (Object entry : map.entrySet()) {
            Map.Entry mapEntry = (Map.Entry) entry;
            System.out.println("Key : " + mapEntry.getKey() + ", Value : "
                    + mapEntry.getValue());
        }
        
        /* Using Direct Key Set */
        System.out.println("\nUsing Direct Key Set");
        for (Object entry : map.keySet()) {
            System.out.println("Key : " + entry + ", Value : "
                    + map.get(entry));
        }
    }
}

Example Output:

Using Iterator
Key: key4, Value: Value 4
Key: key3, Value: Value 3
Key: key5, Value: Value 5
Key: key2, Value: Value 2
Key: key1, Value: Value 1

Using Direct Entry Set
Key : key4, Value : Value 4
Key : key5, Value : Value 5
Key : key2, Value : Value 2
Key : key1, Value : Value 1

Using Direct Key Set
Key : key4, Value : Value 4
Key : key5, Value : Value 5
Key : key2, Value : Value 2
Key : key1, Value : Value 1