package headfirst.templatemethod.sort;public class Duck implements Comparable {	String name;	int weight;  	public Duck(String name, int weight) {		this.name = name;		this.weight = weight;	} 	public String toString() {		return name + " weighs " + weight;	}    	public int compareTo(Object object) { 		Duck otherDuck = (Duck)object;  		if (this.weight < otherDuck.weight) {			return -1;		} else if (this.weight == otherDuck.weight) {			return 0;		} else { // this.weight > otherDuck.weight			return 1;		}	}}