bigdecimalversion.java

来自「Effective Java 中文版 侯捷译配套代码」· Java 代码 · 共 21 行

// Correct version of the program from page 149 using BigDecimal - Page 150

import java.math.BigDecimal;

public class BigDecimalVersion {
    public static void main(String[] args) {
        final BigDecimal TEN_CENTS = new BigDecimal( ".10");

        int itemsBought = 0;
        BigDecimal funds = new BigDecimal("1.00");
        for (BigDecimal price = TEN_CENTS;
             funds.compareTo(price) >= 0;
             price = price.add(TEN_CENTS)) {
            itemsBought++;
            funds = funds.subtract(price);
        }
        System.out.println(itemsBought + " items bought.");
        System.out.println("Money left over: $" + funds);
    }
}