inappropriatefloat.java

effective-java中文英文版,大师人物写的

// Broken - uses floating point for monetary calculation! - page 149

public class InappropriateFloat {
    public static void main(String[] args) {
        double funds = 1.00;
        int itemsBought = 0;
        for (double price = .10; funds >= price; price += .10) {
            funds -= price;
            itemsBought++;
        }
        System.out.println(itemsBought + " items bought.");
        System.out.println("Change: $" + funds);
    }
}