public class Person implements Comparable {

	String name ;
	int id ;
	int age ;
	int weight ;
	
	public Person( int inId, String iName, int iAge, int iWeight)
	{
		id = inId ;
		name = iName ;
		age = iAge ;
		weight = iWeight ;
	}
	
	public String toString()
	{
		return( id + " " + name + " " + age + " " + weight) ;
		
	}
	
	public String getName() { return name ;}
	public int getAge() { return age;}
	public int getWeight() { return weight;}
	public int getId() { return id;}
	
	

	public int compareTo(Object o)  throws ClassCastException {
		if (!(o instanceof Person))
			throw new ClassCastException("A person object is expected") ;
	    int anotherPersonId = ((Person) o).getId() ;
	    	return (id - anotherPersonId ) ;
	}
	
	
			
	
	
	
}