/* 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
	{
		HashMap<String,String>m=new HashMap<String,String>();
		m.put("first","first inserted");
		m.put("second","second inserted");
		m.put("third","third inserted");
		System.out.println("key value pairs are"+m);
		System.out.println(m.get("second"));
		System.out.println(m.isEmpty());
		System.out.println(m.size());
		Set keys=m.keySet();
		for(Object key:keys){
			System.out.println("value of" +key+ "is:"+m.get(key));
		}
 
 
	}
}

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