java Programming Glossary: duck

How do I make the method return type generic?

http://stackoverflow.com/questions/450807/how-do-i-make-the-method-return-type-generic

each Animal can have many friends. And subclasses like Dog Duck Mouse etc which add specific behavior like bark quack etc. Here's.. jerry.addFriend spike new Dog jerry.addFriend quacker new Duck Dog jerry.callFriend spike .bark Duck jerry.callFriend quacker.. quacker new Duck Dog jerry.callFriend spike .bark Duck jerry.callFriend quacker .quack Is there any way I can use generics..

Sorting Java objects using multiple keys

http://stackoverflow.com/questions/8036429/sorting-java-objects-using-multiple-keys

Java objects using multiple keys I've got a collection of Duck objects and I'd like to sort them using multiple keys . class.. and I'd like to sort them using multiple keys . class Duck DuckAge age implements Comparable DuckWeight weight implements.. and I'd like to sort them using multiple keys . class Duck DuckAge age implements Comparable DuckWeight weight implements Comparable..