// Animal.java [static]
import java.util.*;
public class Animal
 implements  Tracer
{
  private String     name;
  private Integer    code;
  public  void    setName(String n) { name = n; }
  public  String  getName() { return name; }
  public  void    setCode(Integer i) { code = i; }
  public  Integer getCode() { return code; }
  // ============= for Tracer
  Tracer$Ego $tracer = new Tracer$Ego( );
  public void trace(String msg) { 
    $tracer.trace(this, msg); 
  }
}