Javaで地図をループする方法

package com.example;

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

public class LoopMap {

    public static void main(String[] args) {

        // initial a Map
        Map map = new HashMap<>();
        map.put("1", "Jan");
        map.put("2", "Feb");
        map.put("3", "Mar");
        map.put("4", "Apr");
        map.put("5", "May");
        map.put("6", "Jun");

        // Standard classic way, recommend!
        System.out.println("\nExample 1...");
        for (Map.Entry entry : map.entrySet()) {
            System.out.println("Key : " + entry.getKey() + " Value : " + entry.getValue());
        }

        // Java 8, forEach and Lambda. recommend!
        System.out.println("\nExample 2...");
        map.forEach((k, v) -> System.out.println("Key : " + k + " Value : " + v));

        // Map -> Set -> Iterator -> Map.Entry -> troublesome, don't use, just for fun
        System.out.println("\nExample 3...");
        Iterator> iterator = map.entrySet().iterator();
        while (iterator.hasNext()) {
            Map.Entry entry = iterator.next();
            System.out.println("Key : " + entry.getKey() + " Value :" + entry.getValue());
        }

        // weired, but works anyway, don't use, just for fun
        System.out.println("\nExample 4...");
        for (Object key : map.keySet()) {
            System.out.println("Key : " + key.toString() + " Value : " + map.get(key));
        }

    }

}

Example 1...
Key : 1 Value : Jan
Key : 2 Value : Feb
Key : 3 Value : Mar
Key : 4 Value : Apr
Key : 5 Value : May
Key : 6 Value : Jun

Example 2...
Key : 1 Value : Jan
Key : 2 Value : Feb
Key : 3 Value : Mar
Key : 4 Value : Apr
Key : 5 Value : May
Key : 6 Value : Jun

Example 3...
Key : 1 Value :Jan
Key : 2 Value :Feb
Key : 3 Value :Mar
Key : 4 Value :Apr
Key : 5 Value :May
Key : 6 Value :Jun

Example 4...
Key : 1 Value : Jan
Key : 2 Value : Feb
Key : 3 Value : Mar
Key : 4 Value : Apr
Key : 5 Value : May
Key : 6 Value : Jun

    map.entrySet().stream()
        .filter(x -> "Jan".equals(x.getValue()))
        .forEach( x -> System.out.println("Key : " + x.getKey() + " Value : " + x.getValue()));

Key : 1 Value : Jan