/* 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
	{
		Base b = new Derive(); // run-time тип - Derive, compile-time тип - Base
        b.kmToMiles(10); // "Derive class"
	}
}
 
class Base{
    public void  kmToMiles(int km){
        System.out.println("Base class");
   }
}
 
class Derive extends Base{
    public void  kmToMiles(int km){
        System.out.println("Derive class");
    } 
}

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