ways to map a map in java

MapMap.java

import java.util.Map;

public class MapMap
{
	Map<String, String> map;
	
	public static void map(Object key, Object value)
	{
		System.out.println(key + ":" + value);
	}
	
	public void mapmap()
	{
		/* loop */
		for (Map.Entry entry: map.entrySet())
		{
			map(entry.getKey(), entry.getValue());
		}
		
		/* lambda expression */
		map.forEach((key,value) -> {
			map(key, value);
		});
	
		/* simplified lambda */
		map.forEach((key,value) -> map(key, value));
		
		/* method reference */
		map.forEach(MapMap::map);
	}
}