Not so dangerous functional Java

FunctionalJavaDemo.java

package functionaljavademo;

import com.google.common.base.Function;
import static com.google.common.collect.DiscreteDomains.integers;
import static com.google.common.collect.Iterables.transform;
import static com.google.common.collect.Ranges.closed;

public class FunctionalJavaDemo
{
    public static final Function<Integer, Integer> squareOf = new Function<Integer, Integer>()
    {
        public Integer apply ( Integer input ) { return input * input; }
    };

    public static void main ( String[] args )
    {
        System.out.println( transform( closed( 1, 25 ).asSet( integers() ), squareOf ) );
    }
}