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/* 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
	{
		num1 a=new num1();
		numeros b=a;
		System.out.println(b.n1 // no puedo acceder);
 
	}
 
	public interface numeros
{
 
}
public class Binarios implements numeros
{
	String n1;
}
public class num1 extends Binarios implements numeros
{
	String n1="0";
}
public class num2 extends Binarios implements numeros
{
	String n1="1";
}
 
}

Main.java:14: error: ')' expected
		System.out.println(b.n1 // no puedo acceder);
		                       ^
Main.java:18: error: illegal start of expression
	public interface numeros
	^
Main.java:18: error: ';' expected
	public interface numeros
	      ^
Main.java:18: error: not a statement
	public interface numeros
	                 ^
Main.java:18: error: ';' expected
	public interface numeros
	                        ^
Main.java:22: error: illegal start of expression
public class Binarios implements numeros
^
Main.java:26: error: illegal start of expression
public class num1 extends Binarios implements numeros
^
Main.java:30: error: illegal start of expression
public class num2 extends Binarios implements numeros
^
Main.java:35: error: reached end of file while parsing
}
 ^
9 errors

Standard output is empty