edu.pdx.cs399J.j2se15
Class CovariantReturns

java.lang.Object
  edu.pdx.cs399J.j2se15.CovariantReturns

public class CovariantReturns
extends Object

This class demonstrates covariant returns in JDK 1.5. The Java compiler allows an overriding method to change the method's return type to be a subclass of the overriden method's return type. However, you have to be extra careful when using covariant returns with legacy code. If someone else overrides a method and doesn't change the return type, their code will not compile.

Since:

Winter 2004

Author:

David Whitlock

Constructor Summary

CovariantReturns()

Method Summary

static void

main(String[] args) A main class that clones some animals.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

CovariantReturns

public CovariantReturns()

Method Detail

main

public static void main(String[] args)

A main class that clones some animals. Note that we don't need to cast the result of the clone method.