/* 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<Integer, MyClass> m = new HashMap<>();
		m.put(1, new MyClass());
		MyClass mc = m.get(1);
		mc.i = 15;
		System.out.println(m.get(1).i);
	}
 
	private static class MyClass{
		public int i = 10;
	}
}

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