import java.util.*;
import static java.lang.Math.PI;
/** Illustrates Java 5 features  @author: Akif Eyler */
public class Java5 {
    /** Typesafe enumeration: objects of class Kind */
    enum Kind { zero, negative, positive, fractional }
    /** Classifies a given Number */
    public static Kind kindOf(Number n) {
        float i = n.floatValue();  
        if (i == 0) return Kind.zero;
        if (n instanceof Float || n instanceof Double) 
            return Kind.fractional;
        return (i < 0)? Kind.negative : Kind.positive;
    }
    static Collection<Number> bag; //Generics
    /** Makes a Number Collection from a Number[] */
    public static Collection<Number> toBag(Number... num) {
        bag = new ArrayList<Number>();
        for (Number n : num) bag.add(n);  //num is Number[]
        return bag;
    }
    public static void main(String... args) {
        for (Number n : toBag(0, 10, 0.01, -33333333333333L, PI))
            System.out.printf("Number %s is %s \n", n, kindOf(n));
    }
}