/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
 
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
		Map<Object, Object> m = new LinkedHashMap<>();
		m.put("zero", 0);
		m.put("1", 1.5);
		m.put(2.5, new Date());
 
		for(Map.Entry<Object, Object> e : m.entrySet()){
			System.out.println(e.getKey().getClass().getName() + "(" + e.getKey() + ")");
			System.out.println(e.getValue().getClass().getName() + "(" + e.getValue() + ")");
		}
	}
}

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