import java.util.ArrayList;

public class Main {
	public void trace(Number n) {
		System.out.println("Number: "+n.getClass().getName());
	}
	
	public void trace(Integer i) {
		System.out.println("Integer");
	}
	
	public void trace(Float f) {
		System.out.println("Float");
	}
	
	public static void main(String[] args) {
		ArrayList<Number> objects = new ArrayList<Number>();

		objects.add(4.6d);
		objects.add(1);
		objects.add(2.3f);
		
		Main main = new Main();
		for (Number n : objects) {
			main.trace(n);
		}
	}
}