Java Covariant Return

CovariantReturn.java

package javatest;

public class CovariantReturn
{
    private static class NumberNode
    {
        public Number get()
        {
            return 13;
        }
    }

    private static class IntegerNode
            extends NumberNode
    {
        @Override
        public Integer get()
        {
            return 42;
        }
    }

    public static void main(String[] args)
    {
        NumberNode node = new IntegerNode();

        Number n = node.get();
        Integer i = ((IntegerNode) node).get();

        System.out.println(n);
        System.out.println(i);
    }
}